Ionic Liquid Modified Polymer Intermediate Layer for Improved Charge Extraction toward Efficient and Stable Perovskite/Silicon Tandem Solar Cells
Author:
Sun Yinqing1,
Mao Lin1,
Yang Tian2,
Zhang Hao1,
Shi Jianhua3,
Tan Qichuan1,
Li Faming1,
Zeng Peng1,
Gong Jue1,
Liu Zhengxin3,
Liu Mingzhen14ORCID
Affiliation:
1. School of Materials and Energy University of Electronic Science and Technology of China Chengdu 611731 P. R. China
2. Sichuan Research Center of New Materials Institute of Chemical Materials China Academy of Engineering Physics Chengdu 610200 China
3. Research Center for New Energy Technology Shanghai Institute of Microsystem and Information Technology (SIMIT) Chinese Academy of Sciences (CAS) Shanghai 200050 P. R. China
4. State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu 611731 China
Abstract
AbstractMonolithic perovskite/silicon tandem solar cells have been attracted much attention in recent years. Despite their high performances, the stability issue of perovskite‐based devices is recognized as one of the key challenges to realize industrial application. When comes to the perovskite top subcell, the interface between perovskite and electron transporting layers (usually C60) significantly affects the device efficiency as well as the stability due to their poor adhesion. Here, different from the conventional interfacial passivation using metal fluorides, a hybrid intermediate layer is proposed—PMMA functionalized with ionic liquid (IL)—is introduced at the perovskite/C60 interface. The application of PMMA essentially improves the interfacial stability due to its strong hydrophobicity, while adding IL relieves the charge accumulation between PMMA and the perovskite. Thus, an optimal wide‐bandgap perovskite solar cells achieves power conversion efficiency of 20.62%. These cells are further integrated as top subcells with silicon bottom cells in a monolithic tandem structure, presenting an optimized PCE up to 27.51%. More importantly, such monolithic perovskite/silicon cells exhibit superior stability by maintaining 90% of initial efficiency after 1200 h under continuous illumination.
Funder
National Key Research and Development Program of China
Fundamental Research Funds for the Central Universities
National Natural Science Foundation of China
Natural Science Foundation of Sichuan Province
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
1 articles.
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