Premium
The Effects of Chromophore Halogenation on the Stability of UV‐Absorbing Organic Solar Cells
Author(s) -
Liu Tianran,
Burlingame Quinn C.,
Sorli Jeni C.,
Ball Melissa L.,
Cheng Guangming,
Yao Nan,
Loo YuehLin
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.202100225
Subject(s) - chromophore , materials science , organic solar cell , acceptor , photochemistry , optoelectronics , photovoltaic system , ultraviolet , photovoltaics , chemistry , polymer , ecology , physics , composite material , biology , condensed matter physics
Transparent photovoltaics that harvest ultraviolet photons are promising point‐of‐use power sources for lower power applications, such as electrochromic windows that regulate the flow of visible and infrared photons for lighting and temperature regulation. Organic photovoltaic cells employing contorted hexabenzocoronene (cHBC) and its derivatives as chromophores have shown promise for transparent solar cells due to their high open‐circuit voltages, large‐area scalability, and high photoactive layer transparency. Here, the operational stability of such devices is investigated and it is found that the solar cell active layers that include peripherally halogenated chromophores undergo rapid morphological degradation during operation, while control cells employing cHBC and other non‐halogenated derivatives as donors with archetype C 70 as an acceptor are highly stable. This study suggests halogenation of chromophores can play an outsized role in determining the operational stability of devices comprising them, which should be considered during the molecular design process.