2D Materials
·
2019
·Vol. 6
·期 4
·045017
·
IF 7.343
Zhongqiang Wang,Zhiyuan Wang,Zongtao Wang,Min Zhao,Yingjuan Zhou,Bo Zhao,Yanqin Miao,Peizhi Liu,Yuying Hao,Hua Wang,Bingshe Xu,Yucheng Wu,Shougen Yin
In this work, soluble two-dimensional (2D) material of antimonene quantum sheets (AMQSs) is used to form a bilayer hole extraction layer (HEL) with CuSCN. It proves that the application of AMQSs helps to passivate surface defects of CuSCN, resulting in diminished recombination loss and depressed exciton quenching effect, and thereby achieving improved photovoltaic performance. In OPVs based on poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b;4,5-b']dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene-)-2-carboxylate-2-6-diyl)]: [6,6]-phenyl C71-butyric acid methyl ester (PTB7-Th:PC71BM), over 12% enhancement of power conversion efficiency (PCE) is observed compared to that of the reference cell fabricated with pure CuSCN as an HEL. The advantage of the bilayer CuSCN/AMQS HEL is also confirmed in non-fullerene systems of PBDB-T-2F:IT-4F and PTB7-Th:ITIC. In a cell based on PBDB-T-2F:IT-4F, a PCE of 10.14% was obtained after application of AMQSs, which improved by about 10% compared to that of the reference cell using pure CuSCN as an HEL. Furthermore, cells based on CuSCN and CuSCN/AMQS HEL exhibit superior air stability. The use of a bilayer CuSCN/AMQS HEL provides a promising approach to obtain efficient and stable organic solar cells.
研究领域:
材料科学
·
光伏技术
·
有机电子学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Yanqi Lv,Yuanzeng Jin,Wanxian Cai,Zhaobin Zhang,Xingfu Zhou,Hongling Chen
Recently, fully air-processed perovskite solar cells have attracted a large number of research workers to promote the process of large-scale productions of perovskite solar cell devices. In this paper, we use a simple substrate preheating at a controlled temperature ranging from 313 K to 353 K to prepare the full coverage and uniform mixed-ion FA 0.83 MA 0.17 PbI 2·49 Br 0.51 perovskite films via a one-step deposition method in ambient air with a relative humidity of 30%∼50%. A high-quality air-processed perovskite film is obtained at an optimized temperature of 333 K. The perovskite solar cells with and without using CuSCN obtain the champion power conversion efficiencies of 14.87% and 11.12% at an optimized substrate preheating temperature of 333 K. The device using CuSCN show 34% increase in power conversion efficiency, which is mainly attributed to the more efficient hole extraction between perovskite and CuSCN, thus contributing to the lower recombination of electrons and holes. The best performed cell without encapsulation displays high stability via 30 days stability tests. High-efficiency fully air-processed devices using CuSCN as hole transport layer and carbon as the back contact electrode are potential candidates for large-scale production of perovskite solar cell.
✓ 已验证
DOI
高影响因子
SOLAR ENERGY
·
2018
·
IF 4.374
Yanqi Lv,Yi Guo,Heng Zhang,Xingfu Zhou,Hongling Chen
In this study, commercial available inorganic p-semiconductor CuSCN and carbon was employed in replacing the expensive hole transport materials and noble metal electrode of the traditional perovskite solar cell, respectively. TiO 2 compact layer and the mesoporous layer were also replaced by TiO 2 nanorod arrays. The fully-air processed perovskite solar cells were easy to fabricate and demonstrated an enhanced efficiency and stability. The introduction of CuSCN improves the current density and the fill factor of the solar cell, thus leads to 29% increase in conversion efficiency. Intensity modulated photovoltage (IMVS) shows that the solar cell with CuSCN has a longer electron life time. Current attenuation curve shows that the current of the solar cell with CuSCN rises quicker and higher than that of the solar cell without CuSCN. The steady-state photoluminescence tests shows that the introduction of CuSCN layer enhances the separation of electrons and holes, thus reducing the recombination of electrons and holes. Electrochemical impedance spectroscopy (EIS) reveals that the solar cell with CuSCN has low transport resistance and high recombination resistance, thus leading to the slower electron recombination rates. In addition, study shows that the use of CuSCN and carbon displays high stability, and both kind of cells keep over 80% of the initial efficiency after 30 days without encapsulation. This method simplifies the perovskite solar cell fabrication process and opens a door toward the cheap, stable and printable solar cell.
研究领域:
光伏技术
·
材料科学
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可再生能源
·
纳米材料
·
半导体器件
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 43
·21435-21444
·
IF 9.931
Haoxin Wang,Ze Yu,Jianbo Lai,Xinkai Song,Xichuan Yang,Anders Hagfeldt,Licheng Sun
The low-cost and stable inorganic p-type semiconductor copper(I) iodide (CuI) is a promising hole-transporting layer (HTL) material for inverted planar perovskite solar cells (PSCs). However, the power conversion efficiencies (PCEs) of inverted planar PSCs based on CuI HTLs reported so far are not satisfactory and far behind those of their organic counterparts. Herein, we demonstrate a simple but effective approach to improve the performance of inverted planar PSCs based on the CuI HTL through the incorporation of copper thiocyanate (CuSCN) into the CuI HTL. As compared to pristine CuI, the introduction of CuSCN significantly improves the quality of the film, resulting in a smooth and uniform film while maintaining relatively high electrical conductivity. As a consequence, the champion device based on the composite CuI/CuSCN HTL affords an impressive PCE of 18.76% under full sun illumination (100 mW cm−2, AM 1.5G), which is substantially higher than the corresponding values of the respective devices containing pristine CuI (14.53%) and CuSCN (16.66%). This value is one of the highest efficiencies reported thus far for CuI- and CuSCN-based HTLs in PSCs. This work demonstrates the great potential of low-temperature solution-processed CuI/CuSCN composites as hole-selective layers for low-cost and efficient PSCs as well as other optoelectronic devices.
研究领域:
材料科学
·
能源技术
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Jinsong Xiong,Ziting You,Shuijin Lei,Kehan Zhao,Qinghuan Bian,Yanhe Xiao,Baochang Cheng
One-dimensional nanostructure arrays hold great promise for orthogonalizing light absorption and carrier collection, and thus have been attractive building blocks for next-generation solar cells. Therefore, it is highly desired to build one-dimensional nanostructure arrays of novel photovoltaic materials. In this work, for the first time, the ternary BiSI nanorod arrays have been successfully fabricated on a tungsten substrate for application in solar cells. These nanorods have an oriented growth along the [001] direction. The UV–vis–NIR absorption results demonstrate that the prepared BiSI nanorods exhibit a continuous strong absorption in the entire visible light region with an indirect band gap of 1.57 eV. A solid-state solar-cell device utilizing the as-grown BiSI nanorod arrays as the n-type absorber layer and CuSCN as the p-type window layer is also developed. The assembled solar-cell device can reach a power conversion efficiency of 0.66% with a fill factor of 52.81%. Therefore, the present study reveals the potential of BiSI nanorod arrays as absorber materials for application in low-cost solar cells.
研究领域:
材料科学
·
纳米技术
·
太阳能
·
光伏
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Tongzhou Wei,Haohong Jiang,Yuanhong Hu,Qiaoming Zhang,Liangqin Zeng,Junjie Guo,Lixiang Chen,Xingwen Tan,Ping Chen,Yanlian Lei
Integrating photodetector and photosynapse functions into a single device is crucial for advancing image perception in neuromorphic visual systems. However, the disparity in response speeds between these functionalities poses significant challenges for multimodal integration. Here, a multimodal optoelectronic device is presented based on a copper(I) thiocyanate (CuSCN)/poly(N-vinylcarbazole) (PVK):Y6 composite heterojunction, achieving ultraviolet (UV)-detection, UV-synapse, and near-infrared (NIR)-detection modes. The device allows seamless switching between modes by precisely tuning the operational voltage and/or adjusting the excitation light wavelength. The charge trapping at the CuSCN/PVK interface, coupled with the controllable movement of photogenerated carriers, enables this multimodal operation. Most importantly, through the synergistic interaction between modes, two optoelectronic applications are demonstrated: frequency-selective photoresponse for encrypted optical communications and NIR-assisted enhancement for image recognition. This work not only provides a straightforward method for multimodal operation within a single device but also highlights the potential for synergistic applications in artificial vision systems.
研究领域:
光电子学
·
神经形态工程
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光子学
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材料科学
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通信技术
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图像处理
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）