Surface engineering of the electron collecting layers for high performance organic photovoltaic cells
- 주제(키워드) Electron collecting layers , Organic solar cell , Surface engineering
- 발행기관 Elsevier B.V.
- 발행년도 2017
- URI http://www.dcollection.net/handler/ewha/000000146922
- 본문언어 영어
- Published As http://dx.doi.org/10.1016/j.cap.2017.08.014
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Surface engineering of the electron collecting layers (ECLs) is a straightforward and practical strategy to develop high performance inverted structure organic solar cells (OSCs). Here, we systematically investigate four different types of surface modified ECLs to implement high performance low-energy band gap poly[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-bA]dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]-thiophenediyl] (PTB7) and [6,6]-phenyl-C70-butyric acid methyl ester (PC70BM) based inverted OSCs: (1) single PEIE, (2) ZnO:PEIE mixture (1:1 vol ratio), (3) PEIE/ZnO bilayer, and (4) ZnO/PEIE bilayer. OSCs with the ZnO/PEIE ECL show the highest power conversion efficiency (PCE) value of 8.61% while all the other devices exhibit PCE values of less than 7.80%. The excellent surface coverage as well as proper band alignment of the ZnO/PEIE bilayer leads to the highest device performance. © 2017 Elsevier B.V.
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