Molecular Design of Hole Transport Materials to Immobilize Ion Motion for Photostable Perovskite Solar Cells
Year: 2024
Type: article
Abstract: Poor operational stability is a crucial factor limiting the further application of perovskite solar cells (PSCs). Organic semiconductor layers can be a powerful means for reinforcing interfaces and inhibiting ion migration. Herein, two hole‐transporting molecules, pDPA‐SFX and mDPA‐SFX, are synthesized with tuned substituent connection sites. The meta‐substituted mDPA‐SFX results in a larger dipole moment, more ordered packing, and better charge mobility than pDPA‐SFX, accompanying with strong interface bonding on perovskite surfaces and suppressed ion motion as well. Importantly, mDPA‐SFX‐based PSCs exhibit an efficiency that has significantly increased from 22.5 % to 24.8 % and a module‐based efficiency of 19.26 % with an active area of 12.95 cm2. The corresponding cell retain 94.8 % of its initial efficiency at maximum power point tracking (MPPT) after 1,000 h (T95=1,000 h). The MPPT T80 lifetime is as long as 2,238 h. This work illustrates that a small degree of structural variation in organic compounds leaves considerable room for developing new HTMs for light stable PSCs.
Source: Angewandte Chemie
Authors: Zheng Zhang, Chenghao Duan, Sijing Wang, Tianyou Xie, Feilin Zou, Yang Luo, Ruijia Tang, Kunpeng Guo, Ligang Yuan, Kaicheng Zhang, Yao Wang, Jianhang Qiu, Keyou Yan
Institutions: South China University of Technology, Taiyuan University of Technology, Beijing University of Chemical Technology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Shanghai Jiao Tong University, Chinese Academy of Sciences, Institute of Metal Research, Shenyang National Laboratory for Materials Science
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4401645588