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Fluorinated Pentafulvalene-Fused Hole-Transporting Material Enhances the Performance of Perovskite Solar Cells with Efficiency Exceeding 23%.

Authors :
Lee, Kun-Mu
Huang, Yao-Shen
Chiu, Wei-Hao
Huang, Ying-Kai
Chen, Gao
Adugna, Gizachew Belay
Li, Sie-Rong
Lin, Fang-Ju
Lu, Shih-I.
Hsieh, Hsiao-Chi
Liau, Kang-Ling
Huang, Chun-Cheng
Tai, Yian
Tao, Yu-Tai
Lin, Yan-Duo
Source :
Advanced Functional Materials; 11/23/2023, Vol. 33 Issue 48, p1-11, 11p
Publication Year :
2023

Abstract

Organic small molecular materials with coplanar π-conjugated system as HTMs in perovskite solar cells (PSCs) have attracted considerable attention due to their high charge transport capability and thermal stability. Herein, three novel pentafulvalene-fused derivatives with or without fluorine atoms incorporated (YSH-oF and YSH-mF and YSH-H, respectively) are designed, synthesized, and applied as hole-transporting materials (HTMs) in PSCs fabrication. The fluorinated HTMs, YSH-oF and YSH-mF, exhibited higher hole mobility and better charge extraction at the perovskite/HTM interface than non-fluorinated one do, presumably due to the closer intermolecular π-π packing interactions. As a result, small-area (0.09 cm<superscript>2</superscript>) PSCs made with YSH-oF and YSH-mF achieved an impressive power conversion efficiency (PCE) of 23.59% and 22.76% respectively, with negligible hysteresis, in contrast with the 20.57% for the YSH-H-based devices. Furthermore, for large-area (1.00 cm<superscript>2</superscript>) devices, the PSCs employing YSH-oF exhibited a PCE of 21.92%. Moreover, excellent long-term device stability is demonstrated for PSCs with F-substituted HTMs (YSH-oF and YSH-mF), presumably due to the higher hydrophobicity. This study shows the great potential of fluorinated pentafulvalene-fused materials as low-cost HTM for efficient and stable PSCs. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
1616301X
Volume :
33
Issue :
48
Database :
Complementary Index
Journal :
Advanced Functional Materials
Publication Type :
Academic Journal
Accession number :
174487542
Full Text :
https://doi.org/10.1002/adfm.202306367