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D-A-D-Typed Hole Transport Materials for Efficient Perovskite Solar Cells: Tuning Photovoltaic Properties via the Acceptor Group
Yunnan Univ, Sch Mat Sci & Engn, Yunnan Key Lab Micro Nano Mat & Technol, Kunming 650091, Yunnan, Peoples R China.
KTH Royal Inst Technol, Appl Phys Chem, Dept Chem, Teknikringen 30, SE-10044 Stockholm, Sweden.
KTH Royal Inst Technol, Wallenberg Wood Sci Ctr, Dept Fiber & Polymer Technol, Chem Sci & Engn, SE-10044 Stockholm, Sweden.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.ORCID iD: 0000-0002-2913-514X
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2018 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 10, no 23, p. 19697-19703Article in journal (Refereed) Published
Abstract [en]

Two D-A-D-structured hole-transport materials (YN1 and YN2) have been synthesized and used in perovskite solar cells. The two HTMs have low-lying HOMO levels and impressive mobility. Perovskite-based solar cells (PSCs) fabricated with YN2 showed a power conversion efficiency (PCE) value of 19.27% in ambient air, which is significantly higher than that of Spiro-OMeTAD (17.80%). PSCs based on YN1 showed an inferior PCE of 16.03%. We found that the incorporation of the stronger electron-withdrawing group in the HTM YN2 improves the PCE of PSCs. Furthermore, the YN2-based PSCs exhibit good long-term stability retaining 91.3% of its initial efficiency, whereas PSCs based on Spiro-OMeTAD retained only 42.2% after 1000 h lifetime (dark conditions). These promising results can provide a new strategy for the design of D-A-D HTMs for PSC applications in future.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2018. Vol. 10, no 23, p. 19697-19703
Keywords [en]
perovskite solar cells, hole-transport material, mobility, spiro-OMeTAD, acceptor
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-358522DOI: 10.1021/acsami.8b04003ISI: 000435525100045PubMedID: 29785846OAI: oai:DiVA.org:uu-358522DiVA, id: diva2:1244689
Funder
Swedish Research CouncilSwedish Energy AgencyKnut and Alice Wallenberg FoundationAvailable from: 2018-09-03 Created: 2018-09-03 Last updated: 2018-09-03Bibliographically approved

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