ITO-free inverted organic solar cells fabricated with transparent and low resistance ZnO/Ag/ZnO multilayer electrode
- Authors
- Kim, Jun Ho; Kang, Tae-Woon; Na, Seok-In; Yoo, Young-Zo; Seong, Tae-Yeon
- Issue Date
- 7월-2015
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- ZnO; Ag; Multilayer; Transparent conducting electrode; Organic solar cell
- Citation
- CURRENT APPLIED PHYSICS, v.15, no.7, pp.829 - 832
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- CURRENT APPLIED PHYSICS
- Volume
- 15
- Number
- 7
- Start Page
- 829
- End Page
- 832
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/93224
- DOI
- 10.1016/j.cap.2015.05.001
- ISSN
- 1567-1739
- Abstract
- Inverted organic solar cells (OSCs) based on poly (3-hexylthiophene) (P3HT):[ 6,6]-phenyl-C61 butyric acid methyl ester (PCBM) bulk heterojunctions (BHJ) were fabricated with optimized ZnO/Ag/ZnO multilayer and conventional indium-tin oxide (ITO) cathode electrodes and their performance was compared. The ZnO/Ag/ZnO multilayer films showed sheet resistances in the range 3.6-3.9 Omega/sq, while ITO exhibited 14.2 Omega/sq. On the one hand, the carrier concentration gradually decreased from 1.74 x 10(22) to 4.33 x 10(21) cm(-3) as the ZnO thickness increased from 8 to 80 nm, respectively. The transmittance of the ZnO(40 nm)/Ag(19 nm)/ZnO(40 nm) films was similar to 95% at 550 nm, which is comparable to that of ITO (similar to 96%). The multilayer films were smooth with a root mean square (RMS) roughness of 0.81 nm. OSCs fabricated with the ZnO(40 nm)/Ag(19 nm)/ZnO(40 nm) film showed a power conversion efficiency (2.63%) comparable to that of OSCs with a conventional ITO cathode (2.71%). (C) 2015 Elsevier B.V. All rights reserved.
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