Improving Low-Bandgap Tin–Lead Perovskite Solar Cells via Contact Engineering and Gas Quench Processing

Werner, Jérémie; Moot, Taylor; Gossett, Tyler A.; Gould, Isaac E.; Palmstrom, Axel F.; Wolf, Eli J.; Boyd, Caleb C.; van Hest, Maikel F. A. M.; Luther, Joseph M.; Berry, Joseph J.; McGehee, Michael D.

doi:10.1021/acsenergylett.0c00255

Improving Low-Bandgap Tin–Lead Perovskite Solar Cells via Contact Engineering and Gas Quench Processing

Journal Article · Tue Mar 17 00:00:00 EDT 2020 · ACS Energy Letters

DOI:https://doi.org/10.1021/acsenergylett.0c00255· OSTI ID:1659847

^[1]; Moot, Taylor ^[2]; Gossett, Tyler A. ^[1]; Gould, Isaac E. ^[3]; Palmstrom, Axel F. ^[2]; Wolf, Eli J. ^[4]; Boyd, Caleb C. ^[4]; ^[2]; ^[2]; Berry, Joseph J. ^[2]; ^[1]

Univ. of Colorado, Boulder, CO (United States); National Renewable Energy Lab. (NREL), Golden, CO (United States)
National Renewable Energy Lab. (NREL), Golden, CO (United States)
National Renewable Energy Lab. (NREL), Golden, CO (United States); Univ. of Colorado, Boulder, CO (United States)
National Renewable Energy Lab. (NREL), Golden, CO (United States); Stanford Univ., CA (United States)

Low-bandgap Sn/Pb ABX₃ perovskites have reached photovoltaic power conversion efficiencies >20%, but they usually have poor stability due to the common use of acidic poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) hole transport layers and A-site cation compositions containing methylammonium (MA). In this work, we develop a process to enable high-quality MA-free Sn/Pb perovskite films grown using a gas quenching process instead of the conventional antisolvents, which provides improved control of the film growth and eliminates wrinkling. Using this method in a device structure with poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) instead of PEDOT:PSS as the hole transport layer, devices can reach efficiencies up to 20%_mppt at 0.06 cm² and up to 17.5%_mppt at 1 cm² active area. With these improvements, the devices are characterized for thermal stability and show 80% of the initial power output remaining after 4000 h at 85 °C.

View Accepted Manuscript (DOE)

Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States); Univ. of Colorado, Boulder, CO (United States)

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

Grant/Contract Number:: AC36-08GO28308; EE0008551

OSTI ID:: 1659847

Alternate ID(s):: OSTI ID: 1834022
OSTI ID: 1894513
OSTI ID: 1682254

Report Number(s):: NREL/JA-5K00-76189; MainId:6645; UUID:99010a81-3b57-ea11-9c31-ac162d87dfe5; MainAdminID:13491

Journal Information:: ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 4 Vol. 5; ISSN 2380-8195

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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14 SOLAR ENERGY
36 MATERIALS SCIENCE
Low-bandgap
film growth
gas quenching
perovskite
perovskites
power conversion efficiency
stability

Improving Low-Bandgap Tin–Lead Perovskite Solar Cells via Contact Engineering and Gas Quench Processing

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