Buried hole-selective interface engineering for high-efficiency tin-lead perovskite solar cells with enhanced interfacial chemical stability  

增强高效锡铅钙钛矿太阳能电池界面化学稳定性的埋底空穴选择界面工程

作　　者：Xu Zhang Jorge Pascual Zhihao Li Xilin Zhang Zhenhuang Su Junhan Zhang Xingyu Gao Bo Hou Guixiang Li Antonio Abate Meng Li 张旭;Jorge Pascual;李志浩;张喜林;苏圳煌;张君瀚;高兴宇;侯博;李桂香;Antonio Abate;李萌

机构地区：[1]Key Lab for Special Functional Materials of Ministry of Education,National&Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology,School of Nanoscience and Materials Engineering,and Collaborative Innovation Center of Nano Functional Materials and Applications,Henan University,Kaifeng 475004,China [2]Polymat,University of the Basque Country UPV/EHU,Donostia-San Sebastián 20018,Spain [3]School of Physics,Henan Normal University,Xinxiang 453007,China [4]Shanghai Synchrotron Radiation Facility(SSRF),Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,China [5]School of Physics and Astronomy,Cardiff University,Cardiff,Wales,CF243AA,UK [6]Institute of Chemical Sciences and Engineering,École Polytechnique Fédérale de Lausanne(EPFL),Lausanne,CH-1015,Switzerland [7]Helmholtz-Zentrum Berlin für Materialien und Energie GmbH,Hahn-Meitner-Platz 1,Berlin,14109,Germany

出　　处：《Science Bulletin》2025年第4期556-562,共7页科学通报(英文版)

基　　金：supported by the Joint Fund of Provincial Science and Technology Research and Development Plan of Henan Province(232301420004);and the Outstanding Youth Fund of the Natural Science Foundation of Henan Province(242300421069);the Energy for future-E4F Postdoctoral fellowship program MSCA-COFUND(101034297).

摘　　要：Mixed Sn-Pb perovskites are attracting significant attention due to their narrow bandgap and consequent potential for all-perovskite tandem solar cells.However,the conventional hole transport materials can lead to band misalignment or induce degradation at the buried interface of perovskite.Here we designed a self-assembled material 4-(9H-carbozol-9-yl)phenylboronic acid(4PBA)for the surface modification of the substrate as the hole-selective contact.It incorporates an electron-rich carbazole group and conjugated phenyl group,which contribute to a substantial interfacial dipole moment and tune the substrate’s energy levels for better alignment with the Sn-Pb perovskite energy levels,thereby promoting hole extraction.Meanwhile,enhanced perovskite crystallization and improved contact at bottom of the perovskite minimized defects within perovskite bulk and at the buried interface,suppressing non-radiative recombination.Consequently,Sn-Pb perovskite solar cells using 4PBA achieved efficiencies of up to 23.45%.Remarkably,the 4PBA layer provided superior interfacial chemical stability,and effectively mitigated device degradation.Unencapsulated devices retained 93.5%of their initial efficiency after 2000 h of shelf storage.

关 键 词：Sn-Pb perovskite Hole-selective materials Interfacial chemical stability Dipole moment High efficiency 

分 类 号：TG1[金属学及工艺—金属学]