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

Environmental Studies and Forestry

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

W. Yang, B. Ding, et al.

This research by Weichuang Yang and colleagues delves into the charge-carrier recombination loss mechanisms in perovskite solar cells, revealing that a favorable energy offset can reduce minority carrier recombination more effectively than conventional chemical passivation. The study showcases groundbreaking results with a power conversion efficiency of 25.32% for 2D/3D heterojunction PSCs, paving the way for more stable and efficient solar technologies.

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Playback language: English
Abstract
This research quantifies charge-carrier recombination loss mechanisms in perovskite solar cells (PSCs) due to interfacial energy offset and defects. It finds that a favorable energy offset reduces minority carriers and suppresses recombination more effectively than chemical passivation. 2D/3D heterojunction PSCs, offering enhanced passivation and charge-carrier extraction, achieve a 25.32% power conversion efficiency (certified 25.04%) in small devices and 21.48% in a large-area module. The 2D/3D heterojunction also suppresses ion migration, leading to improved stability.
Publisher
Advanced Materials
Published On
May 23, 2023
Authors
Weichuang Yang, Bin Ding, Zedong Lin, Jingsong Sun, Yuanyuan Meng, Yong Ding, Jiang Sheng, Zhenhai Yang, Jichun Ye, Paul J Dyson, Mohammad Khaja Nazeeruddin
Tags
perovskite solar cells
charge-carrier recombination
energy offset
2D/3D heterojunction
power conversion efficiency
stability
ion migration
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