Spin-Coated and Vacuum-Processed Hole-Extracting Self-Assembled Multilayers with H-Aggregation for High-Performance Inverted Perovskite Solar Cells
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Detail(s)
Original language | English |
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Article number | e202411730 |
Journal / Publication | Angewandte Chemie - International Edition |
Volume | 63 |
Issue number | 45 |
Online published | 23 Jul 2024 |
Publication status | Published - 4 Nov 2024 |
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DOI | DOI |
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85207587199&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(dae36aa7-da5f-4de8-86ca-25c9379c535c).html |
Abstract
We report a highly crystalline self-assembled multilayer (SAMUL) that is fundamentally different from the conventional monolayer or disordered bilayer used for hole-extraction in inverted perovskite solar cells (PSCs). The SAMUL can be easily formed on ITO substrate to establish better surface coverage to enhance the performance and stability of PSCs. A detailed structure-property-performance relationship of molecules used for SAMUL is established through a systematic study of their crystallinity, molecular packing, and hole-transporting properties. These SAMULs are rationally optimized by varying their molecular structures and deposition methods through thermal evaporation or spin-coating for fabricating PSCs. The CbzNaphPPA-based SAMUL was chosen for fabricating inverted PSCs due to it exhibiting the highest crystallinity and hole mobility which is derived from the ordered H-aggregation. This resulted in a remarkably high fill factor of 86.45 %, which enables a very impressive power conversion efficiency (PCE) of 26.07 % to be achieved along with excellent device stability (94 % of its initial PCE retained after continuous operation for 1200 h under 1-sun irradiation at maximum power point at 65 °C). Additionally, a record-high PCE of 23.50 % could be achieved by adopting a thermally evaporated SAMUL. This greatly simplifies and broadens the scope for SAM to be used for large-area devices on diverse substrates. © 2024 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.
Research Area(s)
- carbazole, H-aggregation, hole-selective layer, perovskite solar cells, self-assembled multilayer
Citation Format(s)
Spin-Coated and Vacuum-Processed Hole-Extracting Self-Assembled Multilayers with H-Aggregation for High-Performance Inverted Perovskite Solar Cells. / Jiang, Wenlin; Wang, Deng; Shang, Wansong et al.
In: Angewandte Chemie - International Edition, Vol. 63, No. 45, e202411730, 04.11.2024.
In: Angewandte Chemie - International Edition, Vol. 63, No. 45, e202411730, 04.11.2024.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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