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

作　　者：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 

机构地区：[1]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 [2]Frontiers Science Center for Flexible Electronics,Xi’an Institute of Flexible Electronics(IFE),Northwestern Polytechnical University,Xi'an 710072,Shaanxi,China [3]School of Artificial Intelligence Optics and Electronics(iOPEN),Northwestern Polytechnical University,Xi'an 710072,Shaanxi,China

出　　处：《Journal of Energy Chemistry》2024年第8期348-356,I0008,共10页能源化学（英文版）

基　　金：financially supported by the Natural Science Foundation of China(Grant Nos.52372226,52173263,62004167);the Natural Science Basic Research Plan in Shaanxi Province of China(Grant Nos.2022JM-315,2023-JC-QN-0643);the National Key R&D Program of China(Grant No.2022YFB3603703);the Qinchuangyuan High-level Talent Project of Shaanxi(Grant No.QCYRCXM-2022-219);the Ningbo Natural Science Foundation(Grant No.2022J061);the Key Research and Development Program of Shaanxi(Grant No.2023GXLH-091);the Shccig-Qinling Program and the Fundamental Research Funds for the Central Universities。

摘　　要：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 transporting property of bulky organic cation spacers limits the performance of 2DRP PSCs.Inspired by the Asite 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(GPA_(0.85)FPEA_(0.15))_(2)MA_(4)Pb_5I_(16)show good morphology,large grain size,decreased trap state density,and preferential orientation of the as-prepared film.Accordingly,the present 2DRP-based PSC with the binary spacer achieves a remarkable efficiency of 18.37%with a V_(OC)of1.15 V,a J_(SC)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.

关 键 词：Perovskite solar cells Two-dimensional Ruddlesden-Popper perovskite Binary spacers Stability 

分 类 号：TM914.4[电气工程—电力电子与电力传动]