Dopant-Free Crossconjugated Hole-Transporting Polymers for Highly Efficient 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 | 1903331 |
Journal / Publication | Advanced Science |
Volume | 7 |
Issue number | 13 |
Online published | 28 May 2020 |
Publication status | Published - Jul 2020 |
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DOI | DOI |
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Attachment(s) | Documents
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85085607186&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(bb891d2d-fa2c-40b1-9e99-0c8d3553aded).html |
Abstract
Currently, there are only very few dopant-free polymer hole-transporting materials (HTMs) that can enable perovskite solar cells (PVSCs) to demonstrate a high power conversion efficiency (PCE) of greater than 20%. To address this need, a simple and efficient way is developed to synthesize novel crossconjugated polymers as high performance dopant-free HTMs to endow PVSCs with a high PCE of 21.3%, which is among the highest values reported for single-junction inverted PVSCs. More importantly, rational understanding of the reasons why two isomeric polymer HTMs (PPE1 and PPE2) with almost identical photophysical properties, hole-transporting ability, and surface wettability deliver so distinctly different device performance under similar device fabrication conditions is manifested. PPE2 is found to improve the quality of perovskite films cast on top with larger grain sizes and more oriented crystallization. These results help unveil the new HTM design rules to influence the perovskite growth/crystallization for improving the performance of inverted PVSCs.
Research Area(s)
- crossconjugated polymers, dopant-free hole-transporting materials, perovskite growth, perovskite solar cells
Citation Format(s)
Dopant-Free Crossconjugated Hole-Transporting Polymers for Highly Efficient Perovskite Solar Cells. / Sun, Xianglang; Deng, Xiang; Li, Zhen et al.
In: Advanced Science, Vol. 7, No. 13, 1903331, 07.2020.
In: Advanced Science, Vol. 7, No. 13, 1903331, 07.2020.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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