@article{dc5fc7c200bc4db798e5060ea003c065,
title = "Origins of Photoluminescence Instabilities at Halide Perovskite/Organic Hole Transport Layer Interfaces",
abstract = "Metal halide perovskites are promising for optoelectronic device applications; however, their poor stability under solar illumination remains a primary concern. While the intrinsic photostability of isolated neat perovskite samples has been widely discussed, it is important to explore how charge transport layers─employed in most devices─impact photostability. Herein, we study the effect of organic hole transport layers (HTLs) on light-induced halide segregation and photoluminescence (PL) quenching at perovskite/organic HTL interfaces. By employing a series of organic HTLs, we demonstrate that the HTL's highest occupied molecular orbital energy dictates behavior; furthermore, we reveal the key role of halogen loss from the perovskite and subsequent permeation into organic HTLs, where it acts as a PL quencher at the interface and introduces additional mass transport pathways to facilitate halide phase separation. In doing so, we both reveal the microscopic mechanism of non-radiative recombination at perovskite/organic HTL interfaces and detail the chemical rationale for closely matching the perovskite/organic HTL energetics to maximize solar cell efficiency and stability.",
author = "Zhaojian Xu and Astridge, {Daniel D.} and Kerner, {Ross A.} and Xinjue Zhong and Junnan Hu and Jisu Hong and Wisch, {Jesse A.} and Kai Zhu and Berry, {Joseph J.} and Antoine Kahn and Alan Sellinger and Rand, {Barry P.}",
note = "Funding Information: We acknowledge funding for this work by the Department of the Navy, Office of Naval Research, under ONR award no. N00014-21-1-2767. This work was authored in part by the National Renewable Energy Laboratory, operated by Alliance for Sustainable Energy, LLC, for the U.S. Department of Energy (DOE) under Contract no. DE-AC36-08GO28308. Funding for R.A.K., K.Z., and J.J.B. was provided by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Solar Energy Technologies Office (SETO) project “Advanced Perovskite Cells and Modules” program (DE-FOA-0000990). A.S. and D.D.A. acknowledge support from the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Solar Energy Technologies Office, by Award no. DE-EE0008978. X.Z. and A.K. acknowledge support from the US-Israel Binational Science Foundation (grant no. 2018349). The views expressed in the article do not necessarily represent the views of the DOE or the U.S. Government. The U.S. Government retains, and the publisher, by accepting the article for publication, acknowledges that the U.S. Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this work, or allow others to do so, for the U.S. Government purposes. The authors acknowledge the use of Princeton{\textquoteright}s Imaging and Analysis Center (IAC), which is partially supported by the Princeton Center for Complex Materials (PCCM), a National Science Foundation (NSF) Materials Research Science and Engineering Center (MRSEC; DMR-2011750). Publisher Copyright: {\textcopyright} 2023 American Chemical Society. All rights reserved.",
year = "2023",
month = may,
day = "31",
doi = "10.1021/jacs.3c03539",
language = "English (US)",
volume = "145",
pages = "11846--11858",
journal = "Journal of the American Chemical Society",
issn = "0002-7863",
publisher = "American Chemical Society",
number = "21",
}