@article{95d5ab13d3f444b1a083c60719c28129,
title = "The Effects of Chromophore Halogenation on the Stability of UV-Absorbing Organic Solar Cells",
abstract = "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 C70 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.",
keywords = "S-kink, crystallization, halogenation, organic solar cells, stability",
author = "Tianran Liu and Burlingame, {Quinn C.} and Sorli, {Jeni C.} and Ball, {Melissa L.} and Guangming Cheng and Nan Yao and Loo, {Yueh Lin}",
note = "Funding Information: The authors thank Dr. E. Tsai and Dr. R. Li for their help with X-ray scattering measurements, which were conducted at the Center for Functional Nanomaterials (CFN) and the Complex Materials Scattering (CMS) beamline of the National Synchrotron Light Source II (NSLS-II), which both are U.S. DOE Office of Science Facilities, at Brookhaven National Laboratory under Contract No. DE-SC0012704. The authors acknowledge the use of Princeton's Imaging and Analysis Center, which is partially supported by the Princeton Center for Complex Materials, a National Science Foundation (NSF)-MRSEC program (DMR-1420541). Y.-L.L. acknowledges support from the National Science Foundation, under grants DMR-1627453, CMMI-1824674, and STTR-1843743. Q.B. thanks the Arnold and Mabel Beckman Foundation for supporting this work. M.B. thanks Princeton's Presidential Postdoctoral Fellowship for funding and expresses gratitude to Dr. Brandon Fowler for mass spectrometry support. Funding Information: The authors thank Dr. E. Tsai and Dr. R. Li for their help with X‐ray scattering measurements, which were conducted at the Center for Functional Nanomaterials (CFN) and the Complex Materials Scattering (CMS) beamline of the National Synchrotron Light Source II (NSLS‐II), which both are U.S. DOE Office of Science Facilities, at Brookhaven National Laboratory under Contract No. DE‐SC0012704. The authors acknowledge the use of Princeton's Imaging and Analysis Center, which is partially supported by the Princeton Center for Complex Materials, a National Science Foundation (NSF)‐MRSEC program (DMR‐1420541). Y.‐L.L. acknowledges support from the National Science Foundation, under grants DMR‐1627453, CMMI‐1824674, and STTR‐1843743. Q.B. thanks the Arnold and Mabel Beckman Foundation for supporting this work. M.B. thanks Princeton's Presidential Postdoctoral Fellowship for funding and expresses gratitude to Dr. Brandon Fowler for mass spectrometry support. Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH",
year = "2021",
month = apr,
day = "28",
doi = "10.1002/aenm.202100225",
language = "English (US)",
volume = "11",
journal = "Advanced Energy Materials",
issn = "1614-6832",
publisher = "Wiley-VCH Verlag",
number = "16",
}