Co-assembled Monolayers as Hole-selective Contact for High-Performance Inverted Perovskite Solar Cells with Optimized Recombination Loss and Long-Term Stability

Xiang Deng; Feng Qi; Fengzhu Li; Shengfan Wu; Francis R. Lin; Zhuomin Zhang; Zhiqiang Guan; Zhengbao Yang; Chun-Sing Lee; Alex K.-Y. Jen

doi:10.1002/anie.202203088

Author(s)

Francis R. Lin
Zhiqiang Guan
Zhengbao Yang
Chun-Sing Lee
Alex K.-Y. Jen

Related Research Unit(s)

Detail(s)

Original language	English
Article number	e202203088
Journal / Publication	Angewandte Chemie (International Edition)
Volume	61
Issue number	30
Online published	12 May 2022
Publication status	Published - 25 Jul 2022

Link(s)

DOI	DOI https://doi.org/10.1002/anie.202203088 Final Published version
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Attachment(s)	Documents 104516267.pdf Post-print, 1.78 MB, PDF Publisher's Copyright Statement COPYRIGHT TERMS OF DEPOSITED POSTPRINT FILE: This is the peer reviewed version of the following article: Deng, X., Qi, F., Li, F., Wu, S., Lin, F. R., Zhang, Z., Guan, Z., Yang, Z., Lee, C-S., & Jen, A. K-Y. (2022). Co-assembled Monolayers as Hole-selective Contact for High-Performance Inverted Perovskite Solar Cells with Optimized Recombination Loss and Long-Term Stability. Angewandte Chemie (International Edition), 61(30), Article e202203088, which has been published in final form at https://doi.org/10.1002/anie.202203088. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
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Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(b85df122-90ba-4a1e-9dbd-7f82ac465f7a).html

Abstract

Self-assembled monolayers (SAMs) have been widely employed as an effective way to modify interfaces of electronic/optoelectronic devices. To achieve a good control of the growth and molecular functionality of SAMs, we develop a co-assembled monolayer (co-SAM) for obtaining efficient hole selection and suppressed recombination at the hole-selective interface in inverted perovskite solar cells (PSCs). By engineering the position of methoxy substituents, an aligned energy level and favorable dipole moment can be obtained in our newly synthesized SAM, ((2,7-dimethoxy-9H-carbazol-9-yl) methyl) phosphonic acid (DC-PA). An alkyl ammonium containing SAM is co-assembled to further optimize the surface functionalization and interaction with perovskite layer on top. A champion device with an excellent power conversion efficiency (PCE) of 23.59 % and improved device stability are achieved. This work demonstrates the advantage of using co-SAM in improving performance and stability of PSCs.