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High-Efficiency Flexible Perovskite Solar Cells Enabled by an Ultrafast Room-Temperature Reactive Ion Etching Process
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry. Sungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon 16419, South Korea.ORCID iD: 0000-0003-2134-4702
Sungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon 16419, South Korea.
Univ Calif San Diego, Dept NanoEngn, La Jolla, CA 92093 USA.
Sungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon 16419, South Korea.
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2020 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 12, no 6, p. 7125-7134Article in journal (Refereed) Published
Abstract [en]

Perovskite solar cells (PSCs), which have surprisingly emerged in recent years, are now aiming at commercialization. Rapid, low-temperature, and continuous fabrication processes that can produce high-efficiency PSCs with a reduced fabrication cost and shortened energy payback time are important challenges on the way to commercialization. Herein, we report a reactive ion etching (RIE) method, which is an ultrafast room-temperature technique, to fabricate mesoporous TiO2 (mp-TiO2) as an electron transport layer for high-efficiency PSCs. Replacing the conventional high-temperature annealing process by RIE reduces the total processing time for fabricating 20 PSCs by 40%. Additionally, the RIE-processed mp-TiO2 exhibits enhanced electron extraction, whereupon the optimized RIE-mp-TiO2-based PSC exhibits a power conversion efficiency (PCE) of 19.60% without JV hysteresis, when the devices were optimized with a TiCl4 surface treatment process. Finally, a flexible PSC employing RIE-mp-TiO2 is demonstrated with 17.29% PCE. Considering that the RIE process has been actively used in the semiconductor industry, including for the fabrication of silicon photovoltaic modules, the process developed in this work could be easily applied toward faster, simpler, and cheaper manufacturing of PSC modules.

Place, publisher, year, edition, pages
2020. Vol. 12, no 6, p. 7125-7134
Keywords [en]
perovskite, solar cells, reactive ion etching, flexible device, low-temperature process
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-407443DOI: 10.1021/acsami.9b19030ISI: 000514256400031PubMedID: 31958005OAI: oai:DiVA.org:uu-407443DiVA, id: diva2:1416848
Funder
Swedish Energy Agency, 43294-1Available from: 2020-03-25 Created: 2020-03-25 Last updated: 2020-03-25Bibliographically approved

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Kim, Byeong JoBoschloo, Gerrit

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