Lead-Free Perovskite Solar Cells with Over 10% Efficiency and Size 1 cm2 Enabled by Solvent-Crystallization Regulation in a Two-Step Deposition Method

被引：57

作者：

Liu, Xiao ^{[1
]}

Wu, Tianhao ^{[2
]}

Luo, Xinhui ^{[2
]}

Wang, Haibin ^{[1
]}

Furue, Miwako ^{[3
]}

Bessho, Takeru ^{[4
]}

Zhang, Yiqiang ^{[5
]}

Nakazaki, Jotaro ^{[4
]}

Segawa, Hiroshi ^{[3
,4
]}

Han, Liyuan ^{[1
,2
]}

机构：

[1] Univ Tokyo, Coll Arts & Sci, Komaba Org Educ Excellence KOMEX, Special Div Environm & Energy Sci, Tokyo 1538902, Japan

[2] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

[3] Univ Tokyo, Grad Sch Arts & Sci, Dept Gen Syst Studies, Tokyo 1138654, Japan

[4] Univ Tokyo, Res Ctr Adv Sci & Technol RCAST, Tokyo 1138654, Japan

[5] Zhengzhou Univ, Henan Inst Adv Technol, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China

来源：

ACS ENERGY LETTERS | 2022年 / 7卷 / 01期

基金：

中国国家自然科学基金;

关键词：

THIN-FILMS; PERFORMANCE; STABILITY;

D O I：

10.1021/acsenergylett.1c02651

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The efficiency of tin perovskite solar cells (TPSCs) decreases largely with increased cell area because of the inhomogeneity of the tin perovskite films formed by a one-step deposition method. Here, we apply a two-step deposition method that is rarely used in TPSCs to solve this problem. We study the steric hindrance of four different solvent molecules in the second step on the crystallization process of tin perovskites and find that the increased steric hindrance to hydroxyl in solvent molecules contributes to dense and homogeneous tin perovskite films. In comparison to the films fabrication by a one-step deposition, the tin perovskite films fabricated by the two-step deposition exhibit a higher uniformity in both the horizontal and longitudinal directions. As a result, over 10% power conversion efficiency of TPSCs was achieved with a cell size of over 1 cm(2). The cell maintained over 92% of its initial efficiency after operation under 1 sun illumination for 1000 h.

引用

页码：425 / 431

页数：7

共 38 条

[1] A combined molecular dynamics and experimental study of two-step process enabling low-temperature formation of phase-pure α-FAPbI3 [J].