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Cyclopentadiene‐Based Hole‐Transport Material for Cost‐Reduced Stabilized Perovskite Solar Cells with Power Conversion Efficiencies Over 23%
Author(s) -
Bauer Michael,
Zhu Hongwei,
Baumeler Thomas,
Liu Yuhang,
Eickemeyer Felix T.,
Lorenz Christoph,
MenaOsteritz Elena,
Hertel Dirk,
Olthof Selina,
Zakeeruddin Shaik Mohammed,
Meerholz Klaus,
Grätzel Michael,
Bäuerle Peter
Publication year - 2021
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.202003953
Subject(s) - materials science , perovskite (structure) , photovoltaics , energy conversion efficiency , solar cell , perovskite solar cell , photovoltaic system , nanotechnology , optoelectronics , engineering physics , chemical engineering , electrical engineering , physics , engineering
Hole transport materials (HTM) are an important component in perovskite solar cells (PSC). Despite a multitude of HTMs developed in recent years, only few of them lead to solar cells with efficiencies over 20%. Therefore, it is still a challenge to develop high‐performing HTMs, which have ideal energy levels of the frontier orbitals, are highly efficient in transporting charges, and stabilize the solar cell at the same time. In this work, the development of a structurally novel molecular HTM, CPDA 1 , is described which is based on a common cyclopentadiene core and can be efficiently and inexpensively synthesized from readily available starting materials, which is important for future realization of low‐cost photovoltaics on larger scale. Due to excellent optoelectronic, thermal, and transport properties, CPDA 1 not only meets the envisioned properties by reaching high efficiencies of 23.1%, which is among the highest reported to date, but also contributes to a respectable long‐term stability of the PSCs.