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Molecular Engineering of Triphenylamine-Based Non-Fullerene Electron-Transport Materials for Efficient Rigid and Flexible Perovskite Solar Cells
Jiangsu Univ, Inst Energy Res, Zhenjiang 212013, Peoples R China..
Jiangsu Univ, Inst Energy Res, Zhenjiang 212013, Peoples R China..
Jiangsu Univ, Inst Energy Res, Zhenjiang 212013, Peoples R China..
Jiangsu Univ, Inst Energy Res, Zhenjiang 212013, Peoples R China..ORCID iD: 0000-0003-0793-0326
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2018 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 10, no 45, p. 38970-38977Article in journal (Refereed) Published
Abstract [en]

There has been a growing interest in the design and synthesis of non-fullerene electron transport materials (ETMs) for perovskite solar cells (PSCs), which may overcome the drawbacks of traditional fullerene derivatives. In this work, a novel donor-acceptor (D-A) structured ETM termed TPA-3CN is presented by molecular engineering of triphenylamine (TPA) as the donor group and (3-cyano-4,5,5-trimethyl-2(5H)-furanylidene) malononitrile as the acceptor group. To further improve the electron mobility and conductivity and achieve excellent photovoltaic performance, a solution processable n-type dopant is introduced during the ETM spin-coating step. After device optimization, PSCs based on the doped TPA-3CN exhibit an impressive power conversion efficiency (PCE) of 19.2% with a negligible hysteresis. Benefitting from the low temperature and good solution processability of ETM TPA-3CN, it was further applied in flexible inverted PSCs and an impressive PCE of 13.2% was achieved, which is among the highest values reported for inverted flexible fullerene-free PSCs.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2018. Vol. 10, no 45, p. 38970-38977
Keywords [en]
perovskite solar cell, non-fullerene, flexible device, electron transport material, planar structure
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-240001DOI: 10.1021/acsami.8b15130ISI: 000451100500034PubMedID: 30339355Scopus ID: 2-s2.0-85056254784OAI: oai:DiVA.org:kth-240001DiVA, id: diva2:1269328
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QC 20181210

Available from: 2018-12-10 Created: 2018-12-10 Last updated: 2018-12-10Bibliographically approved

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Sun, Licheng

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