Yttrium‐doped Sn3O4 two‐dimensional electron transport material for perovskite solar cells with efficiency over 23%. Issue 4 (13th March 2022)

• Record Type: Journal Article
• Authors: Li, Sheng; Liu, Jiale; Liu, Shuang; Zhang, Deyi; Liu, Chao; Li, Daiyu; Qi, Jianhang; Hu, Yue; Mei, Anyi; Han, Hongwei
• Is Part Of: EcoMat. Volume 4:Issue 4(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-03-13
• Subjects: 2D materials -- electron transport materials -- perovskite solar cells -- Y‐Sn3O4; Materials -- Environmental aspects -- Periodicals; Clean energy -- Periodicals; 621.042
• DOI: 10.1002/eom2.12202
• Languages: English
• ISSNs: 2567-3173

Abstract

Abstract: The two‐dimensional mixed‐valence tin oxide Sn3 O4 with a low defect density of states and suitable energy band structure has shown great potential as the electron transport layer (ETL) for perovskite solar cells (PSCs). However, the electron density of Sn3 O4 is low and should be modulated to demonstrate its application for more efficient PSCs. Here, Sn3 O4 is doped with yttrium (Y) to optimize its electronic properties and improve the performance of PSCs based on Sn3 O4 ETL. The conductivity of Sn3 O4 is improved from 6.6 × 10 −4 to 2.05 × 10 −3 S m −1 with increased electron density by Y doping. Meanwhile, the Fermi level of Sn3 O4 is also upshifted after doping. The increased electron density and upshifted Fermi level enhance the electron extraction capability of Sn3 O4 and built‐in potential in PSCs. By doping the Sn3 O4 ETL with Y, the power conversion efficiency of PSCs is successfully boosted to 23.05%. Abstract : Two‐dimensional mixed valence tin oxide Sn3 O4 is applied as electron transport layer (ETL) for efficient perovskite solar cells (PSCs). Yttrium (Y) doping increases the electron concentration and Fermi level of Sn3 O4 . Y doped Sn3 O4 has high electron extraction ability. PSCs based on Y doped Sn3 O4 ETL show efficiency over 23%.