Co-reporter:Yihui Wu, Huanhuan Pan, Xin Zhou, Mingrun Li, Bin Zhou, Chi Yang, Wen-Hua Zhang, Jiansheng Jie and Can Li
Chemical Science 2015 vol. 6(Issue 8) pp:4615-4622
Publication Date(Web):13 May 2015
DOI:10.1039/C5SC00708A
We present the first colloidal synthesis of highly uniform single-crystalline Bi19S27Br3 nanowires (NWs) with a mean diameter of ∼9 nm and tunable lengths in the range of 0.15–2 μm in the presence of foreign metal ions (Al3+). The Al3+ ions not only control the growth of NWs, but also achieve species transformation, i.e., from Bi2S3 to Bi19S27Br3, and are not present in the resulting NWs. This colloidal chemistry approach can be expanded to prepare a family of single-crystalline Bi19S27(Br3−x,Ix) alloyed NWs with controlled compositions (0 ≤ x ≤ 3). Interestingly, these alloyed NWs show an unusual composition-independent band gap of ∼0.82 eV, and theoretical calculations indicate that this phenomenon comes from the very minor contributions of the halogens to the valence band maximum and conduction band minimum. The photodetectors made of Bi19S27(Br3−x,Ix) alloyed NWs show a pronounced photoresponse with high stability and reproducibility, which makes the NWs potentially useful candidates in optoelectronic devices.
Co-reporter:Yihui Wu, Bo Yuan, Mingrun Li, Wen-Hua Zhang, Yan Liu and Can Li
Chemical Science 2015 vol. 6(Issue 3) pp:1873-1878
Publication Date(Web):22 Dec 2014
DOI:10.1039/C4SC03229B
We demonstrate the first colloidal synthesis of single-crystalline BiOCl ultrathin nanosheets (UTNSs) that feature a well-defined square morphology. Unlike BiOCl nanomaterials prepared by hydrothermal routes, our colloidal BiOCl UTNSs exhibit hydrophobic surface properties and high activity and selectivity toward the photocatalytic aerobic oxidation of secondary amines to corresponding imines at room temperature. Hence, the application of BiOCl nanomaterials has been successfully extended from the widely studied photodecomposition of pollutants in aqueous solution to the synthesis of fine chemicals in organic solvent using a green approach.
Co-reporter:Bing Cai, Dong Zhong, Zhou Yang, Baokun Huang, Shu Miao, Wen-Hua Zhang, Jieshan Qiu and Can Li
Journal of Materials Chemistry A 2015 vol. 3(Issue 4) pp:729-733
Publication Date(Web):28 Nov 2014
DOI:10.1039/C4TC02249A
The facile hydrothermal synthesis of rutile TiO2 nanorod arrays on FTO substrates without the use of acids has been developed. The morphology of the nanorods can be finely tuned by changing the growth parameters, and the potential of the as-made rutile TiO2 nanorods in perovskite solar cells was evaluated, showing power conversion efficiencies up to 11.1%.
Co-reporter:Chi Yang, Huanhuan Pan, Sheng Liu, Shu Miao, Wen-Hua Zhang, Jiansheng Jie and Xin Xu
Chemical Communications 2015 vol. 51(Issue 13) pp:2593-2596
Publication Date(Web):02 Jan 2015
DOI:10.1039/C4CC09002K
Single-crystalline Cd3P2 nanowires (NWs) have been synthesized via a solution–liquid–solid (SLS) mechanism. The lengths of the resulting nanowires can be effectively tuned in the range of 180 nm and 5 μm, and the photodetectors made of the Cd3P2 nanowires exhibited a pronounced photoresponse with high stability and reproducibility.
Co-reporter:Yedi Xing, Xiaojia Zheng, Yihui Wu, Mingrun Li, Wen-Hua Zhang and Can Li
Chemical Communications 2015 vol. 51(Issue 38) pp:8146-8149
Publication Date(Web):08 Apr 2015
DOI:10.1039/C5CC01379H
Nitrogen-doped carbon nanotubes decorated with Co and Ni metal nanoparticles were assessed as counter electrodes (CEs) of dye-sensitized solar cells (DSSCs). These composites show good electrocatalytic activity toward the counter electrode reduction reaction (I3− → I−) in DSSCs. The resulting devices using these composites as CEs display photovoltaic performance as good as, or even better than Pt-based devices, indicating their potential for application in DSSCs.
Co-reporter:Zhou Yang, Bing Cai, Bin Zhou, Tingting Yao, Wei Yu, Shengzhong (Frank) Liu, Wen-Hua Zhang, Can Li
Nano Energy 2015 Volume 15() pp:670-678
Publication Date(Web):July 2015
DOI:10.1016/j.nanoen.2015.05.027
•A facile approach has been developed to prepare high-quality perovskite film.•Highly uniform perovskite film with size of 5.0 cm×5.0 cm can be obtained.•The 1.00 cm2 device achievea the highest PCE of 12.6%.In this work, we describe an up-scalable, two step approach to prepare CH3NH3PbI3 perovskite films with high quality and exceptional uniformity at centimeter-scale (5.0 cm×5.0 cm). The resulting solar cells achieve efficiency up to 16% with an average efficiency of 14.3% for small-area devices. Remarkably, devices with size of 1.0 cm×1.0 cm made on the 5.0 cm×5.0 cm perovskite films display a very impressive efficiency up to 12.6% with an average efficiency of 10.9% (for 48 devices), which is significantly superior to previous reports (<9.0% efficiency) with centimeter-sized devices. The present approach combines the advantages of the short reaction time, facile fabrication, exceptional uniformity, good reproducibility, high device performance and up-scalability, enabling it the potential ability in large-scale photovoltaic applications.
Co-reporter:Dong Zhong, Bing Cai, Xiuli Wang, Zhou Yang, Yedi Xing, Shu Miao, Wen-Hua Zhang, Can Li
Nano Energy 2015 Volume 11() pp:409-418
Publication Date(Web):January 2015
DOI:10.1016/j.nanoen.2014.11.014
•Oriented TiO2 nanocones have been prepared on FTO substrate by a facile hydrothermal approach.•Photovoltaic performance of TiO2 nanocone-based perovskite solar cells is significantly superior to the nanorod-based device.•Faster electron injection from excited organmetal halide perovskite to TiO2 nanocone than to TiO2 nanorod was disclosed by TRPL.One-dimensional (1D) rutile TiO2 nanostructures on fluorine-doped tin oxide (FTO) substrates are interesting building blocks of solar cells, and they have been traditionally prepared under highly acidic conditions. In this article, a green, facile hydrothermal approach was exploited to grow oriented rutile TiO2 nanocones on FTO under nearly neutral conditions in a high-control way. XRD, SEM, TEM, HRTEM, and Raman spectroscopy were used to characterize the nanocones, showing rutile phase with single-crystalline structure, and the length of nanocones can be tailored in the range of 700~1400 nm by varying the reaction durations. As building blocks of CH3NH3PbI3-based perovskite solar cells, 11.9% power conversion efficiency was achieved for the TiO2 nanocone devices, which is significantly superior to the state-of-the-art efficiency for other 1D nanostructure counterparts (~10% for TiO2 nanorods and 11% for ZnO nanorods, respectively). It was further revealed by time-resolved photoluminescence spectroscopy (TRPL) that electron transfer from CH3NH3PbI3 to TiO2 nanocones is significantly faster than to TiO2 nanorods, an important factor to suppress charge recombination and improve device performance. These characteristics make nanocones to be a promising candidate as electron transport materials for photovoltaic devices.
Co-reporter:Bin Zhou;Mingrun Li;Yihui Wu;Chi Yang; Wen-Hua Zhang; Can Li
Chemistry - A European Journal 2015 Volume 21( Issue 31) pp:11143-11151
Publication Date(Web):
DOI:10.1002/chem.201501000
Abstract
We report an efficient approach to the synthesis of AgSbS2 nanocrystals (NCs) by colloidal chemistry. The size of the AgSbS2 NCs can be tuned from 5.3 to 58.3 nm with narrow size distributions by selection of appropriate precursors and fine control of the experimental conditions. Over 15 g of high-quality AgSbS2 NCs can be obtained from one single reaction, indicative of the up-scalability of the present synthesis. The resulting NCs display strong absorptions in the visible-to-NIR range and exceptional air stability. The photoelectrochemical measurements indicate that, although the pristine AgSbS2 NC electrodes generate a cathodic photocurrent with a relatively small photocurrent density and poor stability, both of them can be significantly improved subject to CdS surface modification, showing promise in solar energy conversion applications.
Co-reporter:Feng-Qiang Xiong, Xuming Wei, Xiaojia Zheng, Dong Zhong, Wen-Hua Zhang and Can Li
Journal of Materials Chemistry A 2014 vol. 2(Issue 13) pp:4510-4513
Publication Date(Web):20 Jan 2014
DOI:10.1039/C3TA15028C
Layered TiO2 nanotube arrays with new structures were prepared by switching the applied voltage of anodization of Ti. Taking advantage of the solvent effect, in an ethylene glycol electrolyte, arrays with thickness-modulated nanotube walls were prepared; in formamide electrolytes, nanotube arrays on 3-D nanopores, arrays with branched structures and arrays with separable nanotube segments were fabricated by designed voltage procedures.
Co-reporter:Yihui Wu, Bin Zhou, Mingrun Li, Chi Yang, Wen-Hua Zhang and Can Li
Chemical Communications 2014 vol. 50(Issue 84) pp:12738-12741
Publication Date(Web):01 Sep 2014
DOI:10.1039/C4CC06071G
A facile colloidal approach was developed to prepare cubic Cu2(Ge1−x,Snx)(S3−y,Sey) nanocrystals (NCs) (0 ≤ x ≤ 1, 0 ≤ y ≤ 3). The band gaps of the NCs can be tuned in the range of 1.35–2.45 eV by varying the chemical compositions, and the NCs display promising applications in solar energy utilization.
Co-reporter:Xiaojia Zheng, Dongqi Yu, Feng-Qiang Xiong, Mingrun Li, Zhou Yang, Jian Zhu, Wen-Hua Zhang and Can Li
Chemical Communications 2014 vol. 50(Issue 33) pp:4364-4367
Publication Date(Web):05 Feb 2014
DOI:10.1039/C3CC49853K
Anodized TiO2 nanotubes were decorated by II–VI semiconductor nanofilms via atomic layer deposition (ALD) and further employed as photoanodes of semiconductor nanofilm sensitized solar cells (NFSCs) exhibiting superior photovoltaic performance.
Co-reporter:Bin Zhou;Yedi Xing; Shu Miao; Mingrun Li; Wen-Hua Zhang; Can Li
Chemistry - A European Journal 2014 Volume 20( Issue 39) pp:12426-12431
Publication Date(Web):
DOI:10.1002/chem.201404220
Abstract
A facile colloidal approach to synthesize Ag8(Ge1−x,Snx)(S6−y,Sey) nanocrystals (NCs) in a highly controlled way across the entire compositional ranges (0≤x≤1, 0≤y≤6) has been developed. The NCs exhibit a uniform size distribution, highly crystalline structure, over 1 g scalable synthesis, and tunable band gaps in the range of 0.88–1.45 eV by varying their chemical compositions. The Ag8GeS6 NCs with a band gap of approximately 1.45 eV were employed as a model light harvester to assess their applicability in solar cells by a full solution-processing device, yielding an efficiency of 0.28 % under AM1.5 illumination, demonstrating their application potential in solar energy utilization.
Co-reporter:Xiaojia Zheng;Jiao Deng;Nan Wang; Dehui Deng; Wen-Hua Zhang; Xinhe Bao ; Can Li
Angewandte Chemie International Edition 2014 Volume 53( Issue 27) pp:7023-7027
Publication Date(Web):
DOI:10.1002/anie.201400388
Abstract
Podlike nitrogen-doped carbon nanotubes encapsulating FeNi alloy nanoparticles (Pod(N)-FeNi) were prepared by the direct pyrolysis of organometallic precursors. Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and Tafel polarization measurements revealed their excellent electrocatalytic activities in the I−/I3− redox reaction of dye-sensitized solar cells (DSSCs). This is suggested to arise from the modification of the surface electronic properties of the carbon by the encapsulated metal alloy nanoparticles (NPs). Sequential scanning with EIS and CV further showed the high electrochemical stability of the Pod(N)-FeNi composite. DSSCs with Pod(N)-FeNi as the counter electrode (CE) presented a power conversion efficiency of 8.82 %, which is superior to that of the control device with sputtered Pt as the CE. The Pod(N)-FeNi composite thus shows promise as an environmentally friendly, low-cost, and highly efficient CE material for DSSCs.
Co-reporter:Wen-Hua Zhang;Bing Cai
Science Bulletin 2014 Volume 59( Issue 18) pp:2092-2101
Publication Date(Web):2014 June
DOI:10.1007/s11434-014-0259-9
Great attention has recently been drawn to developing cost-effective, high efficiency solar cells to meet the ever increasing demand for clean energy. We have most recently witnessed a breakthrough and a rapid development in solid state, hybrid solar cells using organolead halide perovskites as light harvesters. These semiconductors can not only serve as sensitizer in solid state sensitized solar cells with efficiency up to unprecedented 15 %, but also function as both light absorber and hole conductor (or electron conductor) at the same time to display power conversion efficiency above 10 %. In this review, we will introduce their operation mechanism, structure, and especially the development of the organolead halide perovskite based solar cells. Based on the achievements that have been made to date, solid state photovoltaic device with superior performance than the present one is highly expected.
Co-reporter:Chi Yang ; Bin Zhou ; Shu Miao ; Chunyan Yang ; Bing Cai ; Wen-Hua Zhang ;Xin Xu
Journal of the American Chemical Society 2013 Volume 135(Issue 16) pp:5958-5961
Publication Date(Web):April 6, 2013
DOI:10.1021/ja400452t
A facile solution-phase route was developed to synthesize a family of monodisperse Cu2Ge(S3–xSex) alloyed nanocrystals (NCs) with controlled composition across the entire range (0 ≤ x ≤ 3). The band gaps of the resultant NCs can be engineered by tuning the compositions with a nearly linear relationship between them. The band structures of the NCs were studied by cyclic voltammetry and UV–vis absorption spectroscopy. The conducting behavior was revealed to be p-type for these NCs by photoelectrochemical measurements. Their photovoltaic applicability was finally assessed by fabricating solar cells with the Cu2Ge(S2Se) NCs as light harvester and CdS nanorods as electron conducting materials.
Co-reporter:Xiaojia Zheng, Jiahao Guo, Yantao Shi, Fengqiang Xiong, Wen-Hua Zhang, Tingli Ma and Can Li
Chemical Communications 2013 vol. 49(Issue 83) pp:9645-9647
Publication Date(Web):23 Aug 2013
DOI:10.1039/C3CC45064C
Porous chalcogels CoMoS4 and NiMoS4 made by a facile solution reaction displayed good electrocatalytic activity in the redox reaction of the I−/I3− shuttle. Dye-sensitized solar cells with these ternary compounds as counter electrodes (CEs) showed photovoltaic performance similar to the devices made with noble metal platinum CE (7.46%).
Co-reporter:Chunyan Yang, Mingrun Li, Wen-Hua Zhang, Can Li
Solar Energy Materials and Solar Cells 2013 Volume 115() pp:100-107
Publication Date(Web):August 2013
DOI:10.1016/j.solmat.2013.03.023
•Controlled growth of CdS branched nanorod arrays on FTO substrate is achieved.•The branches are formed by epitaxial growth from the backbones.•The microstructures of the branched nanorod arrays can be easily tuned.•Superior performance of the branched nanorod arrays is demonstrated in hybrid solar cells.Controlled growth of single-crystalline CdS branched nanorod arrays (B-NRs) on fluorine-doped tin oxide (FTO) substrate is achieved by growing the branches on the pre-formed CdS straight nanorod arrays (NRs) via the hydrothermal approach. The branches are formed by epitaxial growth from the backbones, and no seeds or catalysts are involved in the synthesis process. The microstructures of the CdS B-NRs can be easily tuned by varying the reaction parameters. The structures of CdS B-NRs are characterized in detail by field-emission scanning electron microscopy (SEM), X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM) with focused ion beam (FIB) cutting of the materials. The properties and application of the CdS B-NRs are assessed by UV–vis absorption spectroscopy, photoelectrochemical cells and hybrid photovoltaic devices. Experimental results show that, compared to the straight NRs counterparts, the CdS B-NRs fabricated in this work exhibited significantly stronger light absorbability, remarkably enhanced photocurrents in photoelectrochemical cells, and an improvement of up to 92% in power conversion efficiency for hybrid solar cells. This work demonstrates clearly the advantages of the branched nanostructures over the straight one in device applications.Graphical abstract
Co-reporter:Dr. Sheng Liu;Dr. Xiaoyang Guo; Mingrun Li; Wen-Hua Zhang; Xingyuan Liu; Can Li
Angewandte Chemie International Edition 2011 Volume 50( Issue 50) pp:12050-12053
Publication Date(Web):
DOI:10.1002/anie.201105614
Co-reporter:Dr. Sheng Liu;Dr. Xiaoyang Guo; Mingrun Li; Wen-Hua Zhang; Xingyuan Liu; Can Li
Angewandte Chemie 2011 Volume 123( Issue 50) pp:12256-12259
Publication Date(Web):
DOI:10.1002/ange.201105614
Co-reporter:Dong Zhong, Qike Jiang, Baokun Huang, Wen-Hua Zhang, Can Li
Journal of Energy Chemistry (September 2015) Volume 24(Issue 5) pp:626-631
Publication Date(Web):1 September 2015
DOI:10.1016/j.jechem.2015.08.002
We have exploited a green approach to prepare layered titanate Na2-xHxTi2O5•H2O nanosheet arrays on FTO substrate by hydrothermal hydrolysis of titanium(IV) isopropoxide (TTIP) with aids of Na2EDTA and TEOA as co-coordination agents, which were then treated by HNO3 to replace Na+ by H+, followed by a calcination at 450 °C to topotactically transform into anatase TiO2 nanosheet arrays. SEM, TEM, XRD, and Raman spectroscopy have been employed to characterize the nanosheet films. The TiO2 nanosheet arrays were further applied as electron transport materials of CH3NH3PbI3 perovskite solar cells, achieving power conversion efficiency of 6.99%.Download high-res image (46KB)Download full-size image Well-defined anatase TiO2 nanosheet arrays have been formed on FTO substrate via a green hydrothermal approach, and have been employed as building blocks of perovskite solar cells.
Co-reporter:Chunyan Yang, Mingrun Li, Wen-Hua Zhang, Can Li
Solar Energy Materials and Solar Cells (August 2013) Volume 115() pp:100-107
Publication Date(Web):1 August 2013
DOI:10.1016/j.solmat.2013.03.023
•Controlled growth of CdS branched nanorod arrays on FTO substrate is achieved.•The branches are formed by epitaxial growth from the backbones.•The microstructures of the branched nanorod arrays can be easily tuned.•Superior performance of the branched nanorod arrays is demonstrated in hybrid solar cells.Controlled growth of single-crystalline CdS branched nanorod arrays (B-NRs) on fluorine-doped tin oxide (FTO) substrate is achieved by growing the branches on the pre-formed CdS straight nanorod arrays (NRs) via the hydrothermal approach. The branches are formed by epitaxial growth from the backbones, and no seeds or catalysts are involved in the synthesis process. The microstructures of the CdS B-NRs can be easily tuned by varying the reaction parameters. The structures of CdS B-NRs are characterized in detail by field-emission scanning electron microscopy (SEM), X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM) with focused ion beam (FIB) cutting of the materials. The properties and application of the CdS B-NRs are assessed by UV–vis absorption spectroscopy, photoelectrochemical cells and hybrid photovoltaic devices. Experimental results show that, compared to the straight NRs counterparts, the CdS B-NRs fabricated in this work exhibited significantly stronger light absorbability, remarkably enhanced photocurrents in photoelectrochemical cells, and an improvement of up to 92% in power conversion efficiency for hybrid solar cells. This work demonstrates clearly the advantages of the branched nanostructures over the straight one in device applications.Graphical abstractDownload full-size image
Co-reporter:Xiaojia Zheng, Dongqi Yu, Feng-Qiang Xiong, Mingrun Li, Zhou Yang, Jian Zhu, Wen-Hua Zhang and Can Li
Chemical Communications 2014 - vol. 50(Issue 33) pp:NaN4367-4367
Publication Date(Web):2014/02/05
DOI:10.1039/C3CC49853K
Anodized TiO2 nanotubes were decorated by II–VI semiconductor nanofilms via atomic layer deposition (ALD) and further employed as photoanodes of semiconductor nanofilm sensitized solar cells (NFSCs) exhibiting superior photovoltaic performance.
Co-reporter:Yedi Xing, Xiaojia Zheng, Yihui Wu, Mingrun Li, Wen-Hua Zhang and Can Li
Chemical Communications 2015 - vol. 51(Issue 38) pp:NaN8149-8149
Publication Date(Web):2015/04/08
DOI:10.1039/C5CC01379H
Nitrogen-doped carbon nanotubes decorated with Co and Ni metal nanoparticles were assessed as counter electrodes (CEs) of dye-sensitized solar cells (DSSCs). These composites show good electrocatalytic activity toward the counter electrode reduction reaction (I3− → I−) in DSSCs. The resulting devices using these composites as CEs display photovoltaic performance as good as, or even better than Pt-based devices, indicating their potential for application in DSSCs.
Co-reporter:Xiaojia Zheng, Jiahao Guo, Yantao Shi, Fengqiang Xiong, Wen-Hua Zhang, Tingli Ma and Can Li
Chemical Communications 2013 - vol. 49(Issue 83) pp:NaN9647-9647
Publication Date(Web):2013/08/23
DOI:10.1039/C3CC45064C
Porous chalcogels CoMoS4 and NiMoS4 made by a facile solution reaction displayed good electrocatalytic activity in the redox reaction of the I−/I3− shuttle. Dye-sensitized solar cells with these ternary compounds as counter electrodes (CEs) showed photovoltaic performance similar to the devices made with noble metal platinum CE (7.46%).
Co-reporter:Yihui Wu, Bin Zhou, Mingrun Li, Chi Yang, Wen-Hua Zhang and Can Li
Chemical Communications 2014 - vol. 50(Issue 84) pp:NaN12741-12741
Publication Date(Web):2014/09/01
DOI:10.1039/C4CC06071G
A facile colloidal approach was developed to prepare cubic Cu2(Ge1−x,Snx)(S3−y,Sey) nanocrystals (NCs) (0 ≤ x ≤ 1, 0 ≤ y ≤ 3). The band gaps of the NCs can be tuned in the range of 1.35–2.45 eV by varying the chemical compositions, and the NCs display promising applications in solar energy utilization.
Co-reporter:Yihui Wu, Bo Yuan, Mingrun Li, Wen-Hua Zhang, Yan Liu and Can Li
Chemical Science (2010-Present) 2015 - vol. 6(Issue 3) pp:NaN1878-1878
Publication Date(Web):2014/12/22
DOI:10.1039/C4SC03229B
We demonstrate the first colloidal synthesis of single-crystalline BiOCl ultrathin nanosheets (UTNSs) that feature a well-defined square morphology. Unlike BiOCl nanomaterials prepared by hydrothermal routes, our colloidal BiOCl UTNSs exhibit hydrophobic surface properties and high activity and selectivity toward the photocatalytic aerobic oxidation of secondary amines to corresponding imines at room temperature. Hence, the application of BiOCl nanomaterials has been successfully extended from the widely studied photodecomposition of pollutants in aqueous solution to the synthesis of fine chemicals in organic solvent using a green approach.
Co-reporter:Yihui Wu, Huanhuan Pan, Xin Zhou, Mingrun Li, Bin Zhou, Chi Yang, Wen-Hua Zhang, Jiansheng Jie and Can Li
Chemical Science (2010-Present) 2015 - vol. 6(Issue 8) pp:NaN4622-4622
Publication Date(Web):2015/05/13
DOI:10.1039/C5SC00708A
We present the first colloidal synthesis of highly uniform single-crystalline Bi19S27Br3 nanowires (NWs) with a mean diameter of ∼9 nm and tunable lengths in the range of 0.15–2 μm in the presence of foreign metal ions (Al3+). The Al3+ ions not only control the growth of NWs, but also achieve species transformation, i.e., from Bi2S3 to Bi19S27Br3, and are not present in the resulting NWs. This colloidal chemistry approach can be expanded to prepare a family of single-crystalline Bi19S27(Br3−x,Ix) alloyed NWs with controlled compositions (0 ≤ x ≤ 3). Interestingly, these alloyed NWs show an unusual composition-independent band gap of ∼0.82 eV, and theoretical calculations indicate that this phenomenon comes from the very minor contributions of the halogens to the valence band maximum and conduction band minimum. The photodetectors made of Bi19S27(Br3−x,Ix) alloyed NWs show a pronounced photoresponse with high stability and reproducibility, which makes the NWs potentially useful candidates in optoelectronic devices.
Co-reporter:Bing Cai, Dong Zhong, Zhou Yang, Baokun Huang, Shu Miao, Wen-Hua Zhang, Jieshan Qiu and Can Li
Journal of Materials Chemistry A 2015 - vol. 3(Issue 4) pp:NaN733-733
Publication Date(Web):2014/11/28
DOI:10.1039/C4TC02249A
The facile hydrothermal synthesis of rutile TiO2 nanorod arrays on FTO substrates without the use of acids has been developed. The morphology of the nanorods can be finely tuned by changing the growth parameters, and the potential of the as-made rutile TiO2 nanorods in perovskite solar cells was evaluated, showing power conversion efficiencies up to 11.1%.
Co-reporter:Feng-Qiang Xiong, Xuming Wei, Xiaojia Zheng, Dong Zhong, Wen-Hua Zhang and Can Li
Journal of Materials Chemistry A 2014 - vol. 2(Issue 13) pp:NaN4513-4513
Publication Date(Web):2014/01/20
DOI:10.1039/C3TA15028C
Layered TiO2 nanotube arrays with new structures were prepared by switching the applied voltage of anodization of Ti. Taking advantage of the solvent effect, in an ethylene glycol electrolyte, arrays with thickness-modulated nanotube walls were prepared; in formamide electrolytes, nanotube arrays on 3-D nanopores, arrays with branched structures and arrays with separable nanotube segments were fabricated by designed voltage procedures.
Co-reporter:Chi Yang, Huanhuan Pan, Sheng Liu, Shu Miao, Wen-Hua Zhang, Jiansheng Jie and Xin Xu
Chemical Communications 2015 - vol. 51(Issue 13) pp:NaN2596-2596
Publication Date(Web):2015/01/02
DOI:10.1039/C4CC09002K
Single-crystalline Cd3P2 nanowires (NWs) have been synthesized via a solution–liquid–solid (SLS) mechanism. The lengths of the resulting nanowires can be effectively tuned in the range of 180 nm and 5 μm, and the photodetectors made of the Cd3P2 nanowires exhibited a pronounced photoresponse with high stability and reproducibility.
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