Origins of Photoluminescence Instabilities at Halide Perovskite/Organic Hole Transport Layer Interfaces

Xu, Zhaojian; Astridge, Daniel D.; Kerner, Ross A.; Zhong, Xinjue; Hu, Junnan; Hong, Jisu; Wisch, Jesse A.; Zhu, Kai; Berry, Joseph J.; Kahn, Antoine; Sellinger, Alan; Rand, Barry P.

doi:10.1021/jacs.3c03539

Title: Origins of Photoluminescence Instabilities at Halide Perovskite/Organic Hole Transport Layer Interfaces

Journal Article · Thu May 18 00:00:00 EDT 2023 · Journal of the American Chemical Society

DOI:https://doi.org/10.1021/jacs.3c03539· OSTI ID:1986070

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^[3]; Zhong, Xinjue ^[1];

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Princeton Univ., NJ (United States)
Colorado School of Mines, Golden, CO (United States)
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
National Renewable Energy Laboratory (NREL), Golden, CO (United States); Univ. of Colorado, Boulder, CO (United States)
Colorado School of Mines, Golden, CO (United States); National Renewable Energy Laboratory (NREL), Golden, CO (United States)

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. Here, in this paper, 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.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; US Department of the Navy, Office of Naval Research (ONR); National Science Foundation (NSF)

Grant/Contract Number:: AC36-08GO28308; FOA-0000990; EE0008978; N00014-21-1-2767; DMR-2011750

OSTI ID:: 1986070

Report Number(s):: NREL/JA-5900-85680; MainId:86453; UUID:1c448b9a-e4c1-44f7-b602-b56aa06cad7a; MainAdminID:69724

Journal Information:: Journal of the American Chemical Society, Vol. 145, Issue 21; ISSN 0002-7863

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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14 SOLAR ENERGY
halide perovskite
halide segregation
iodide oxidation
organic hole transport material
photoluminescence quenching
halogens
inorganic compounds
iodine
layers
perovskites

Title: Origins of Photoluminescence Instabilities at Halide Perovskite/Organic Hole Transport Layer Interfaces

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