Oxygen Contribution for Uniform Formation of Crystalline Zinc Oxide/Polyethylenimine Interfaces to Boost Charge Generation/Transport in Inverted Organic Solar Cells
- Authors
- Park, Soyun; Jang, Woongsik; Cho, Jae Sang; Yi, Minji; Wang, Dong Hwan
- Issue Date
- May-2018
- Publisher
- ELSEVIER SCIENCE INC
- Keywords
- Iverted organic photovoltaic (OPV) cells; Buffer layer; Zinc oxide (ZnO); Oxygen contribution; Self-assembly
- Citation
- JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, v.61, pp 314 - 320
- Pages
- 7
- Journal Title
- JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
- Volume
- 61
- Start Page
- 314
- End Page
- 320
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/2159
- DOI
- 10.1016/j.jiec.2017.12.029
- ISSN
- 1226-086X
1876-794X
- Abstract
- This work demonstrates inverted organic photovoltaics with zinc oxide under an oxygen environment. ZnO films are based on a zinc acetate dihydrate and prepared via annealing in air or argon which performance shows a clear dependence on ZnO formation. We investigated chemical component and crystal structure of ZnO through XPS and XRD. The oxygen contributed ZnO enhances the self-assembly between amine of polyethylenimine (PEI) and hydroxyls, which induces smoothness of ZnO/PEI interface. As a result, PCE with optimized ZnO/PEI exhibited 8.83%, compared to in argon (4.67%). Moreover, oxygen-contributed ZnO/PEI cells lead to air stability with 80% sustained efficiency during the 500 hours. (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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