CHINESE JOURNAL OF CHEMISTRY
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2023
·Vol. 41
·期 23
·3197-3204
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IF 5.4
Hui Zhang,Yuan Zhou,Tonghui Guo,Xiang Zhang,Zhenkun Zhu,Junjun Jin,Xiaxia Cui,Dan Zhang,Zhen Wang,Lin Li,Nai Wang,Guanqi Tang,Qidong Tai
Comprehensive Summary Formamidinium (FA)-based Sn-Pb perovskite solar cells (FAPb 0.5 Sn 0.5 I 3 PSCs) with ideal bandgap and impressive thermal stability have caught enormous attention recently. However, it still suffers from the challenge of realizing high efficiency due to the surface imperfections of the transport materials and the energy-level mismatch between functional contacts. Herein, it is demonstrated that the modification on buried interface with alkali metal salts is a viable strategy to alleviate these issues. We systematically investigate the role of three alkali metal bromide salts (NaBr, KBr, CsBr) by burying them between the NiO x hole transport layer (HTL) and the perovskite light-absorbing layer, which can effectively passivate interface defects, improve energy-level matching and release the internal residual strain in perovskite layers. The device with CsBr buffer layer exhibits the best power conversion efficiency (PCE) approaching 20%, which is one of the highest efficiencies for FA-based Sn-Pb PSCs employing NiO x HTLs. Impressively, the long-term storage stability of the unencapsulated device is also greatly boosted. Our work provides an efficient strategy to prepare desired FA-based ideal-bandgap Sn-Pb PSCs which could be applied in tandem solar cells.
研究领域:
材料科学
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光伏技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 9
·期 4
·1303-1309
·
IF 7.059
Wantian Yang,Jiarui Hu,Jian Chen,Yaxin Xu,Guoliang Tong,Haotian Fan,Xingchen Chai,Junnian Chen,Yunbin He
Two-dimensional diamine-based perovskites are now attracting intense interest due to their enhanced ambient stability as compared to monoamine-based perovskites. Few reports to date have focused on the fundamental morphology of diamine-based perovskite single crystals and related this to their electrical properties and the further photoconductivity behaviors. Herein, we systematically investigated pentamethylenediammonium lead bromide (PDAPbBr4) and pentylammonium lead bromide (PA2PbBr4) perovskite single crystals, and explored how their morphology and structure characteristics affected their electrical properties and photodetecting performances. Notably, PDAPbBr4 perovskite exhibited distinctive smooth and continuous morphology, quite different from the rough and discontinuous morphology of PA2PbBr4 perovskite. Besides, the single organic interlayer spacer in PDAPbBr4 perovskite induced an orderly arrangement of inorganic sheets and decreased interlayer distance. With smooth, continuous morphology and shortened interlayer distance, PDAPbBr4 perovskite exhibited lower defect density and higher electrical conductivity than PA2PbBr4 perovskite. Importantly, a PDAPbBr4-based photodetector produced a responsivity of 7.92 mA W−1, a photocurrent on/off ratio of 246, and response time of 31 ms, which outperformed a PA2PbBr4-based photodetector by 387 times in responsivity, 27 times in on/off ratio, and 10 times in response time. The findings might provide a foundation for understanding the morphology characteristics of 2D perovskites and the effects on their optoelectronic performance.
研究领域:
材料科学
·
电子工程
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
·
2019
·
IF 1.536
Xiaofeng Wang,Beihai Zhou,Xia Shao
Dimethylamine-based pharmaceutical personal care products (DMA-based PPCPs) are a group of N-nitrosodimethylamine (NDMA) precursors. The acid dissociation constant (pKa) values of four DMA-based PPCPs were determined by potentiometric titration over the pH range of 3–11. The pKa values of ranitidine, nizatidine, doxylamine and carbinoxamine corresponding to the DMA moiety were 8.4, 6.8, 9.4 and 9.1, respectively. Competition reaction kinetics and pseudo-first-order reaction kinetics were used to determine the reaction rate constant (k) of the DMA-based PPCPs with O3, NaClO, ClO2 and KMnO4. Comparing the degradation rate constants of the four DMA-based PPCPs, the results of ClO2 oxidation were close, and for the other three oxidants, the order was kranitidine ≈ knizatidine > kdoxylamine ≈ kcarbinoxamine. Comparing the reaction rate of the four oxidants, for ranitidine and nizatidine, the order was kNaClO > kO3 > kKMnO4 > kClO2, and for doxylamine and carbinoxamine, the order was kO3 > kNaClO > kClO2 > kKMnO4.
研究领域:
环境科学
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化学动力学
✓ 已验证
DOI
高影响因子
Chemical Engineering Journal Advances
·
2021
·
IF 0
Weifeng Chen,Guo Lv,Xiang Liu,Jiaying Yan,Qichun Zhang,Dong-Sheng Li
Although a few “on–off” approaches such as the pH-adjusting, temperature-adjusting, and controlling by light upon photo-catalysts have been reported, the “on–off” control of the on-broad and on-demand hydrogen production still faces many challenges. Herein, we first report the usage of Zn 2+ /EDTA-2Na system as an unprecedented, universal, high-efficient, and reusable “on–off” switch for the on-demand H 2 evolution upon the hydrolysis of ammonia borane, sodium borohydride and dimethyl aminoborane. This “on–off” switch has been demonstrated to be efficient and reusable in various heterogeneous and homogeneous metal catalysts for on-demand H 2 evolution. The detailed characterizations have confirmed that Zn 2+ ions attached and located at the surface of catalyst, covered its active sites on the surface, and turned off the H 2 production. The H 2 generation was switched on by the addition of EDTA-2Na, due to its strong coordination ability with Zn 2+ ions. In addition, the Zn 2+ /EDTA-2Na switch has been successfully reused several times without any activity loss in the “on–off” control of H 2 evolution. This switch is of great importance in the practical application for highly efficient, on-site and on-demand H 2 evolution under ambient conditions.
研究领域:
氢能
·
催化
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材料科学
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化学工程
✓ 已验证
DOI
Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-11
·
IF 36.3
Liu Jianbo,Zhang Meng,Sun Xiaoran,Xiang Linhu,Yang Xiangyu,Hu Xin,Wang Zhicheng,Hou Tian,Qin Jinzhao,Huang Yuelong,Abdi-Jalebi Mojtaba,Hao Xiaojing
RbI is the most effective in mitigate PbI 2 precipitation caused by Pb(SCN) 2 while maintaining large grains.
Rb is kept at the grain boundaries during crystallization and Ostwald ripening, contributes to a slow growth of the grains.
Wide-bandgap perovskite solar cells with blade-coated perovskite in air achieved a certified power conversion efficiency of 23%, among the highest values reported.
研究领域:
材料科学
·
光伏技术
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薄膜技术
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纳米技术
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固体物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）