Atmospheric Humidity Underlies Irreproducibility of Formamidinium Lead Iodide Perovskites

Park, Keonwoo; Tan, Shaun; Kodalle, Tim; Lee, Do‐Kyoung; Abdelsamie, Maged; Park, Ji‐Sang; Lee, Joo‐Hong; Jung, Sung‐Kwang; Ko, Jeong Hoon; Park, Nam‐Gyu; Sutter‐Fella, Carolin M.; Yang, Yang; Lee, Jin‐Wook

doi:10.1002/adma.202307265

Title: Atmospheric Humidity Underlies Irreproducibility of Formamidinium Lead Iodide Perovskites

Journal Article · Thu Dec 21 00:00:00 UTC 2023 · Advanced Materials

DOI: https://doi.org/10.1002/adma.202307265 · OSTI ID:2281923

Park, Keonwoo ^[1]; Tan, Shaun ^[2]; Kodalle, Tim ^[3]; Lee, Do‐Kyoung ^[4]; Abdelsamie, Maged ^[5]; Park, Ji‐Sang ^[4]; Lee, Joo‐Hong ^[4]; Jung, Sung‐Kwang ^[4]; Ko, Jeong Hoon ^[6]; Park, Nam‐Gyu ^[4]; Sutter‐Fella, Carolin M. ^[3]; Yang, Yang ^[2];

^[4]

Sungkyunkwan Univ., Suwon (Korea, Republic of); University of California, Los Angeles
Univ. of California, Los Angeles, CA (United States)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Molecular Foundry
Sungkyunkwan Univ., Suwon (Korea, Republic of)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
California Institute of Technology (CalTech), Pasadena, CA (United States)

Metal halide perovskite solar cells (PSCs) are infamous for their batch-to-batch and lab-to-lab irreproducibility in terms of stability and performance. Reproducible fabrication of PSCs is a critical requirement for market viability and practical commercialization. PSC irreproducibility plagues all levels of the community; from institutional research laboratories, start-up companies, to large established corporations. Here, in this work, the critical function of atmospheric humidity to regulate the crystallization and stabilization of formamidinium lead triiodide (FAPbI₃) perovskites is unraveled. It is demonstrated that the humidity content during processing induces profound variations in perovskite stoichiometry, thermodynamic stability, and optoelectronic quality. Almost counterintuitively, it is shown that the presence of humidity is perhaps indispensable to reproduce phase-stable and efficient FAPbI₃-based PSCs.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Univ. of California, Los Angeles, CA (United States)

Sponsoring Organization:: USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)

Grant/Contract Number:: AC02-05CH11231; EE0008751

OSTI ID:: 2281923

Journal Information:: Advanced Materials, Journal Name: Advanced Materials Journal Issue: 14 Vol. 36; ISSN 0935-9648

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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14 SOLAR ENERGY
crystallizations
halide perovskites
humidity
in situ studies
reproducibility
scalability
solar cells
stability

Title: Atmospheric Humidity Underlies Irreproducibility of Formamidinium Lead Iodide Perovskites

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