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Surface engineering of the electron collecting layers for high performance organic photovoltaic cells

Title
Surface engineering of the electron collecting layers for high performance organic photovoltaic cells
Authors
Lim J.W.Shim J.W.Chung K.Kim D.H.Choi W.K.Hwang D.K.
Ewha Authors
김동하
SCOPUS Author ID
김동하scopus
Issue Date
2017
Journal Title
Current Applied Physics
ISSN
1567-1739JCR Link
Citation
vol. 17, no. 11, pp. 1476 - 1482
Keywords
Electron collecting layersOrganic solar cellSurface engineering
Publisher
Elsevier B.V.
Indexed
SCI; SCIE; SCOPUS; KCI WOS scopus
Abstract
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.
DOI
10.1016/j.cap.2017.08.014
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자연과학대학 > 화학·나노과학전공 > Journal papers
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