Sn Composition Engineering Toward the Breakthrough of Transparent Front Electrodes for Efficient and Stable Perovskite Solar Cells

Author:

Seok Hae‐Jun1,Park Jung‐Min1,Lan Shuai1,Kim Han‐Ki1ORCID

Affiliation:

1. School of Advanced Materials Science and Engineering Sungkyunkwan University Suwon Gyeonggi‐do 16419 Republic of Korea

Abstract

AbstractTo overcome the Shockley–Queisser limit, studies have focused on improving the efficiency of perovskite solar cells (PSCs) through several optimization and tandem‐structure design strategies. Furthermore, the significance of emerging transparent front electrodes (TFEs), which exert a direct and substantial influence on the performance of PSCs, is on the rise. Therefore, further research must be conducted to validate these effects in improving the existing performance of PSCs. Thus, this study developed a composition‐engineered indium tin oxide (CE‐ITO) TFE that outperforms commercial ITO (C‐ITO; 10 at.% Sn doped ITO) for efficient and stable PSCs. The CE‐ITO electrode (7.50 at.% Sn doped ITO) has a large columnar structure and good thermal stability, which are ideal for high‐performance PSCs. Compared to C‐ITO, CE‐ITO has a smoother surface, higher conductivity, lower resistivity, and improved optical transmittance in the active layer. These contribute to the larger perovskite active‐ and electron‐transport layers, less active‐layer degradation, and lower shunt resistance. The various merits of CE‐ITO enable high‐performance PSCs with a maximum power conversion efficiency of 23.35% and long‐term stability by simply substituting C‐ITO with optimal CE‐ITO.

Funder

Ministry of Science and ICT, South Korea

National Research Foundation of Korea

Publisher

Wiley

Subject

General Materials Science,Renewable Energy, Sustainability and the Environment

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