Low‐Temperature Synthesis of SnO<sub>2</sub> Nanocrystals as Electron Transport Layers for High‐Efficiency CsPbI<sub>2</sub>Br Perovskite Solar Cells
Haoran Tian, Jingjing He, Xinyi Liu, Qing Li, Da Liu, Benben Shen, Shuang Yang, Qiang Niu, Yu Hou
Abstract
Perovskite solar cells (PSCs) have recently become a hot topic in photovoltaics due to their high power conversion efficiency (PCE) and low‐cost processing. As a key component of PSCs, electron transport layers (ETLs) that play a vital role in efficient PSCs generally require high charge extraction ability, mobility, and easy fabrication. Herein, a simple route to obtain dispersion of tin oxide nanocrystals (SnO 2 NCs) with uniform diameters and high stability as efficient ETLs for CsPbI 2 Br solar cells is demonstrated. The champion device achieves a remarkable PCE of 16.22% with an open‐circuit voltage of 1.30 V. This work offers a facile and effective way to fabricate high‐performance ETL nanocrystals in PSCs.