DataVXAdvanced MaterialsPaper
journal article·2023-09Open access

Visualizing Interfacial Energy Offset and Defects in Efficient 2D/3D Heterojunction Perovskite Solar Cells and Modules

Weichuang Yang, Bin Ding, Zedong Lin, Jingsong Sun, YuanYuan Meng, Yong Ding, Jiang Sheng, Zhenhai Yang, Jichun Ye, Paul J. Dyson, Mohammad Khaja Nazeeruddin

Advanced Materials· Volume 35· Issue 35
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Source abstract

Abstract

Abstract Currently, the full potential of perovskite solar cells (PSCs) is limited by chargecarrier recombination owing to imperfect passivation methods. Here, the recombination loss mechanisms owing to the interfacial energy offset and defects are quantified. The results show that a favorable energy offset can reduce minority carriers and suppress interfacial recombination losses more effectively than chemical passivation. To obtain high‐efficiency PSCs, 2D perovskites are promising candidates, which offer powerful field effects and require only modest chemical passivation at the interface. The enhanced passivation and charge‐carrier extraction offered by the 2D/3D heterojunction PSCs has boosted their power conversion efficiency to 25.32% (certified 25.04%) for small‐size devices and to 21.48% for a large‐area module (with a designated area of 29.0 cm2). Ion migration is also suppressed by the 2D/3D heterojunction, such that the unencapsulated small‐size devices maintain 90% of their initial efficiency after 2000 h of continuous operation at the maximum power point.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences (CAS) Ningbo 315201 P. R. China

University of Chinese Academy of Sciences Beijing 100049 P. R. China

Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL) Lausanne CH‐1015 Switzerland

Guangdong Provincial Key Lab of Nano‐Micro Materials Research School of Chemical Biology and Biotechnology Shenzhen Graduate School Peking University Shenzhen 518055 P. R. China

Zhejiang Energy Group R&D 152 Xihu District Hangzhou 310003 P. R. China

School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China Soochow University Suzhou 215031 P. R. China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China

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