DataVXAdvanced Functional MaterialsPaper
journal article·2025-01Open access

Efficient Silicon Solar Cells with Aluminum‐Doped Zinc Oxide‐Based Passivating Contact

Kun Gao, Dacheng Xu, Jing Wang, Qunyu Bi, Zhao Wu, Hong Lin, Shibo Wang, Wei Shi, Cao Yu, Fengxian Cao, Yifan Diao, Junjie Xie, Xinyu Wang, Kun Li, Xinliang Lou, Wenhao Li, Chunfang Xing, Yujiao Wang, Tong Yan, Daliang Zhang, Stefaan de Wolf, Xiaohong Zhang, Xinbo Yang

Advanced Functional Materials· Volume 35· Issue 4
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Source abstract

Abstract

Abstract Crystalline silicon (c‐Si) solar cells require passivating contacts to unlock their full efficiency potential. For this doped silicon layers are the materials of choice, as they yield device voltages close to the thermodynamic limit. Yet, replacing such layers with wide‐bandgap metal oxides may be advantageous from a cost perspective and minimize parasitic optical absorption. Here the aluminum‐doped zinc oxide (AZO)‐based passivating contacts with high electron selectivity are presented. The SiO2/AZO/Al2O3 stack is demonstrated to provide excellent surface passivation on c‐Si (implied Voc up to 742 mV) after thermal annealing, and an average contact resistivity of 51 mΩ cm2 is simultaneously obtained after etching off Al2O3 capping layer. By the implementation of AZO‐based electron‐selective contact, a champion power conversion efficiency (PCE) of 24.3% is achieved on c‐Si solar cells, representing the PCE record for metal oxide‐based passivating contacts. Finally, the efficiency potential, cost, and industrial compatibility of the AZO‐based electron‐selective contacts are discussed, paving the way for industrial applications.
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Research context

Materials processing

OpenAlex topics: Silicon and Solar Cell Technologies · Semiconductor materials and interfaces · Thin-Film Transistor Technologies

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

Affiliations

College of Energy Soochow University Suzhou 215006 China

LONGi Central R&D Institute LONGi Green Energy Technology Co., Ltd Xi'an 710000 China

School of Optoelectronic Science and Engineering Soochow University Suzhou 215006 China

Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow University Suzhou 215123 China

Multi‐scale Porous Materials Center Institute of Advanced Interdisciplinary Studies & School of Chemistry and Chemical Engineering Chongqing University Chongqing 401331 China

King Abdullah University of Science and Technology (KAUST) KAUST Solar Center (KSC) Thuwal 23955‐6900 Saudi Arabia

Suzhou Institute of Renewable Energy & Photoelectronics Suzhou 215000 China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Collaborative Innovation Center of Suzhou Nano Science and Technology

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