Development of a julolidine-based interfacial modifier for efficient inverted polymer solar cells
- Authors
- Choi E.Y.; Nam S.Y.; Song C.E.; Kong K.-J.; Lee C.; Jung, In Hwan; Yoon S.C.
- Issue Date
- Dec-2015
- Publisher
- Royal Society of Chemistry
- Citation
- RSC Advances, v.5, no.130, pp.107540 - 107546
- Indexed
- SCIE
SCOPUS
- Journal Title
- RSC Advances
- Volume
- 5
- Number
- 130
- Start Page
- 107540
- End Page
- 107546
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/24761
- DOI
- 10.1039/c5ra21087a
- ISSN
- 2046-2069
- Abstract
- To enhance the performance of inverted polymer solar cells (PSCs), we have designed and synthesized interfacial modifiers (IMs) which provide better surface properties for the ZnO layer. The synthesized IMs were composed of electron donating and accepting parts. Julolidine or diethyl aniline was used as a donor part, and cyano acrylic acid as an acceptor part. The julolidine-based B1 material exhibited a much stronger dipole moment of 9.86 D than diethyl aniline-based B2 (9.17 D), and the water contact angle of the ZnO surface treated with B1 (65.3°) was much larger than that with B2 (39.8°). These julolidine effects were much more powerful than diethyl aniline: the julolidine moiety significantly decreased the hydrophilicity of the ZnO surface and its work function (WF). The inverted devices with the configuration of ITO/ZnO/IMs (B1 or B2)/PTB7-Th:PC
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