2021年11月25日，《科学》杂志在线发表了美国国家可再生能源实验室Kai Zhu等研究人员的最新合作成果，该研究发现，亚稳的Dion-Jacobson二维结构实现高效和稳定的钙钛矿型太阳能电池。

Title: Metastable Dion-Jacobson 2D structure enables efficient and stable perovskite solar cells

Author: Fei Zhang, So Yeon Park, Canglang Yao, Haipeng Lu, Sean P. Dunfield, Chuanxiao Xiao, Soňa Uliná, Xiaoming Zhao, Linze Du Hill, Xihan Chen, Xiaoming Wang, Laura E. Mundt, Kevin H. Stone, Laura T. Schelhas, Glenn Teeter, Sean Parkin, Erin L. Ratcliff, Yueh-Lin Loo, Joseph J. Berry, Matthew C. Beard, Yanfa Yan, Bryon W. Larson, Kai Zhu

Issue&Volume: 2021-11-25

Abstract: The performance of three-dimensional (3D) organic-inorganic halide perovskite solar cells (PSCs) can be enhanced by surface treatment with 2D layered perovskites that have efficient charge transport. We maximized hole transport across the layers of a metastable Dion-Jacobson (DJ) 2D perovskite that tuned the orientational arrangements of asymmetric bulky organic molecules. The reduced energy barrier for hole transport increased out-of-plane transport rates by a factor of 4 to 5, and the power conversion efficiency (PCE) for the n=1 2D PSC was 4.9%. With the metastable DJ 2D surface layer, the PCE of three common 3D PSCs was enhanced by ~12–16% and could reach ~24.7%. For a triple-cation-mixed-halide PSC, 90% of the initial PCE was retained after 1000-hours of 1-sun operation at ~40°C in N2.

DOI: abj2637

Source: https://www.science.org/doi/10.1126/science.abj2637