Highly oriented quasi-2D layered tin halide perovskites with 2-thiopheneethylammonium iodide for efficient and stable tin perovskite solar cells. (12th January 2022)

• Record Type: Journal Article
• Authors: Xu, Yanting; Jiang, Ke-Jian; Wang, Pengcheng; Gu, Wei-Min; Yu, Guang-Hui; Zhou, Xueqin; Song, Yanlin
• Is Part Of: New journal of chemistry. Volume 46:Number 5(2022)
• Page Start: 2259
• Page End: 2265
• Publication Date: 2022-01-12
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d1nj05178d
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : The addition of TEAI can induce oriented growth of perovskite films and enhance the efficiency with high stability. Abstract : 3D tin-based halide perovskites are promising light absorbers for perovskite solar cells (PSCs) due to their non-toxicity, suitable optical band gaps, and excellent optoelectronic properties. However, the inherent rapid crystallization and easy oxidation of Sn 2+ to Sn 4+ in 3D perovskites result in a low power conversion efficiency (PCE) and poor stability of tin perovskite solar cells compared with the lead counterparts. In this report, quasi-2D hybrid tin-based perovskite films are fabricated by using 2-thiopheneethylammonium (TEA + ) as the spacer cation in MASnI3 (MA: CH3 NH3 + ), leading to the formation of quasi-2D perovskite films with high orientation and a low content of Sn 4+ . As a result, the perovskite solar cells show a considerable power-conversion efficiency of 6.8%, which is among the highest values reported for MASnI3 -based solar cells. Moreover, the devices exhibited excellent stability compared with the device without TEAI.