文献类型：期刊文献

英文题名：Minimizing interfacial energy losses in inverted perovskite solar cells by a dipolar stereochemical 2D perovskite interface

作者：Qian, Junjie[1];He, Jingjing[2];Zhang, Qihang[1];Zhu, Chenyue[1];Chen, Shilin[1];Wei, Zhanpeng[1];Leng, Xuesong[1];Zhou, Ziren[1];Shen, Benben[1];Peng, Yu[1];Niu, Qiang[2];Yang, Shuang[1];Hou, Yu[1]

机构：[1]East China Univ Sci & Technol, Key Lab Ultrafine Mat, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn,Minist Educ, Shanghai 200237, Peoples R China;[2]Inner Mongolia Erdos Elect Power & Met Grp Co Ltd, Natl Enterprise Technol Ctr, Ordos 016064, Inner Mongolia, Peoples R China

年份：2024

卷号：90

起止页码：496

外文期刊名：JOURNAL OF ENERGY CHEMISTRY

收录：;EI(收录号：20240115324514);WOS:【SCI-EXPANDED(收录号:WOS:001150202700001)】；

基金：This work was financially supported by the National Ten Thousand Talent Program for Young Top-notch Talent, China, the National Natural Science Fund for Excellent Young Scholars, China (52022030) , the National Natural Science Foundation of China, China (51972111, 52203330), the Shanghai Pilot Program for Basic Research, China (22TQ1400100-5) , the "Dawn" Program of Shanghai Education Commission, China (22SG28), the Shanghai Municipal Natural Science Foundation, China (22ZR1418000) , the Science and Technology Innovation Plan of Shanghai Science and Technology Commission, China (22YF1410000) , the Postdoctoral Research Foundation of China, China (2021M701190), the Fundamental Research Funds for the Central Universities, China (JKD01231632, JKVD1231041) , the Major Science and Technology Projects of Inner Mongolia Autonomous Region, China (2021ZD0042), the Shanghai Engineering Research Center of Hierarchical Nanomaterials, China (18DZ2252400).

语种：英文

外文关键词：Perovskite solar cells; Dipole interlayer; Stereochemistry; Non-radiative recombination

摘要：Inverted perovskite solar cells (PSCs) have attracted broad research and industrial interest owing to their suppressed hysteresis, cost-effectiveness, and easy-fabrication. However, the issue of non-radiative recombination losses at the n-type interface between the perovskite and fullerene has impeded further improvement of photovoltaic performance. Here, we modify the n-type interface of FAPbI3 perovskite films by constructing a stereochemical two-dimensional (2D) perovskite interlayer, in which the organic cations comprise both pyridine and ammonium groups. The pyridine N donor can create stable bonding with the surface-uncoordinated Pb on the perovskite, thereby passivating the shallow-level defects and enhancing the air stability of the film. Furthermore, the pyridine N donor also offers a positive polar interface to decrease the surface work function of the perovskite film, enabling n-type modification. Ultimately, we employ a p-i-n photovoltaic (PV) device with the positive dipole interlayer at perovskite/fullerene contact and achieve remarkable photoelectric conversion efficiency (PCE) of 22.0%.(c) 2023 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.