首页|Boosting MA-based two-dimensional Ruddlesden-Popper perovskite solar cells by incorporating a binary spacer

Boosting MA-based two-dimensional Ruddlesden-Popper perovskite solar cells by incorporating a binary spacer

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Two-dimensional Ruddlesden-Popper(2DRP)perovskite exhibits excellent stability in perovskite solar cells(PSCs)due to introducing hydrophobic long-chain organic spacers.However,the poor charge trans-porting property of bulky organic cation spacers limits the performance of 2DRP PSCs.Inspired by the A-site cation alloying strategy in 3D perovskites,2DRP perovskites with a binary spacer can promote charge transporting compared to the unary spacer counterparts.Herein,the superior MA-based 2DRP perovskite films with a binary spacer,including 3-guanidinopropanoic acid(GPA)and 4-fluorophenethylamine(FPEA)are realized.These films(GPA0.85FPEA0.15)2MA4Pb5I16 show good morphology,large grain size,decreased trap state density,and preferential orientation of the as-prepared film.Accordingly,the pre-sent 2DRP-based PSC with the binary spacer achieves a remarkable efficiency of 18.37％with a Voc of 1.15 V,a Jsc of 20.13 mA cm-2,and an FF of 79.23％.To our knowledge,the PCE value should be the highest for binary spacer MA-based 2DRP(n ≤ 5)PSCs to date.Importantly,owing to the hydrophobic fluorine group of FPEA and the enhanced interlayer interaction by FPEA,the unencapsulated 2DRP PSCs based on binary spacers exhibit much excellent humidity stability and thermal stability than the unary spacer counterparts.

Perovskite solar cellsTwo-dimensional Ruddlesden-PopperperovskiteBinary spacersStability

Xue Dong、Yinhao Tang、Yiqun Li、Xin Li、Yuzhen Zhao、Wenqi Song、Fangmin Wang、Shudong Xu、Yipeng Zhou、Chenxin Ran、Zongcheng Miao、Lin Song、Zhongbin Wu

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Xi'an Key Laboratory of Advanced Photo-Electronics Materials and Energy Conversion Device,Technological Institute of Materials & Energy Science(TIMES),Xijing University,Xi'an 710123,Shaanxi,China

Frontiers Science Center for Flexible Electronics,Xi'an Institute of Flexible Electronics(IFE),Northwestern Polytechnical University,Xi'an 710072,Shaanxi,China

School of Artificial Intelligence,OPtics and ElectroNics(iOPEN),Northwestern Polytechnical University,Xi'an 710072,Shaanxi,China

Natural Science Foundation of ChinaNatural Science Foundation of ChinaNatural Science Foundation of ChinaNatural Science Basic Research Plan in Shaanxi Province of ChinaNatural Science Basic Research Plan in Shaanxi Province of ChinaNational Key R&D Program of ChinaQinchuangyuan Highlevel Talent Project of ShaanxiNingbo Natural Science FoundationKey Research and Development Program of ShaanxiShccig-Qinling ProgramFundamental Research Funds for the Central Universities

5237222652173263620041672022JM-3152023-JC-QN-06432022YFB3603703QCYRCXM-2022-2192022J0612023GXLH-091

2024

10.1016/j.jechem.2024.03.047

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.95(8)