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New Antimony-Based Organic-Inorganic Hybrid Material as Electron Extraction Layer for Efficient and Stable Polymer Solar Cells
Dracula Technol, France; Univ Grenoble Alpes, France.
Aix Marseille Univ, France.
Dracula Technol, France.
Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
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2019 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 11, no 47, p. 44820-44828Article in journal (Refereed) Published
Abstract [en]

Hybrid organic-inorganic materials are a new class of materials used as interfacial layers (ILs) in polymer solar cells (PSCs). A hybrid material, composed of antimony as the inorganic part and diaminopyridine as the organic part, is synthesized and described as a new material for application as the electron extraction layer (EEL) in PSCs and compared to the recently demonstrated hybrid materials using bismuth instead of antimony. The hybrid compound is solution-processed onto the photoactive layer based on a classical blend, which is composed of a PTB7-Th low band gap polymer as the donor mixed with PC70BM fullerene as the acceptor material. By using a regular device structure and an aluminum cathode, the solar cells exhibited a power conversion efficiency of 8.42%, equivalent to the reference device using ZnO nanocrystals as the IL, and strongly improved compared to the bismuth-based hybrid material. The processing of extraction layers up to a thickness of 80 nm of such hybrid material reveals that the change from bismuth to antimony has strongly improved the charge extraction and transport properties of the hybrid materials. Interestingly, nanocomposites made of the hybrid material mixed with ZnO nanocrystals in a 1:1 ratio further improved the electronic properties of the extraction layers, leading to a power conversion efficiency of 9.74%. This was addressed to a more closely packed morphology of the hybrid layer, leading to further improved electron extraction. It is important to note that these hybrid EELs, both pure and ZnO-doped, also greatly improved the stability of solar cells, both under dark storage in air and under lighting under an inert atmosphere compared to solar cells treated with ZnO intermediate layers.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2019. Vol. 11, no 47, p. 44820-44828
Keywords [en]
hybrid material; interfacial layer; nanocrystals; morphology; electron extraction; solar cell
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-162965DOI: 10.1021/acsami.9b12409ISI: 000500415700109PubMedID: 31690074Scopus ID: 2-s2.0-85075557352OAI: oai:DiVA.org:liu-162965DiVA, id: diva2:1382343
Note

Funding Agencies|Swedish Research CouncilSwedish Research Council [2016-05498]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (Faculty Grant SFO Mat LiU) [2009 00971]

Available from: 2020-01-02 Created: 2020-01-02 Last updated: 2020-01-21Bibliographically approved

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