Molecular Design of Hole Transport Materials to Immobilize Ion Motion for Photostable Perovskite Solar Cells
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 cm<sup>2</sup>. The corresponding cell retain 94.8 % of its initial efficiency at maximum power point tracking (MPPT) after 1,000 h (T<sub>95</sub>=1,000 h). The MPPT T<sub>80</sub> 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.
Authors
- Feilin Zou
- Zheng Zhang (ORCID: https://orcid.org/0000-0003-2704-0355)
- Jianhang Qiu (ORCID: https://orcid.org/0000-0002-7029-1523)
- Kaicheng Zhang (ORCID: https://orcid.org/0000-0003-3468-3543)
- Tianyou Xie
- Chenghao Duan (ORCID: https://orcid.org/0000-0002-4609-3017)
- Keyou Yan (ORCID: https://orcid.org/0000-0003-4380-7325)
- Ligang Yuan (ORCID: https://orcid.org/0000-0001-6505-3232)
- Yao Wang (ORCID: https://orcid.org/0000-0003-4814-8285)
- Sijing Wang (ORCID: https://orcid.org/0000-0002-1933-003X)
- Ruijia Tang
- Kunpeng Guo (ORCID: https://orcid.org/0000-0003-3071-4429)
- Yang Luo (ORCID: https://orcid.org/0000-0003-4536-3457)
Institutions
- Friedrich-Alexander-Universität Erlangen-Nürnberg (DE)
- Shanghai Jiao Tong University (CN)
- Chinese Academy of Sciences (CN)
- Interface (United States) (US)
- Beijing University of Chemical Technology (CN)
- South China University of Technology (CN)
- Taiyuan University of Technology (CN)
Publication Details
- Journal
- Angewandte Chemie International Edition
- Published
- 2024-08-16
- DOI
- https://doi.org/10.1002/anie.202412042
- Citations
- 16
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 3.34
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Shanxi Province
- Foundation for Distinguished Young Talents in Higher Education of Guangdong
- National Key Research and Development Program of China
- Science and Technology Planning Project of Guangdong Province