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Effects of Ga- and Al-Codoped ZnO Buffer Layer on the Performance of Inverted Polymer Solar Cells
- Effects of Ga- and Al-Codoped ZnO Buffer Layer on the Performance of Inverted Polymer Solar Cells
- Lee, Sang-Ju; Kim, Dae-Hwan; Kang, Jin Kyu; Kim, Dong Young; Kim, Hwa-Min; Han, Yoon Soo
- DGIST Authors
- Kim, Dae-Hwan; Kang, Jin Kyu
- Issue Date
- Journal of Nanoscience and Nanotechnology, 13(12), 7839-7843
- Article Type
- Al-Doped Zinc Oxide; Aluminum; Buffer Layer; Buffer Layers; Doping (Additives); Effective Electrons; Electric Resistance; Ga; Gallium; Inverted Polymer Solar Cell; Inverted Polymer Solar Cells; Open Circuit Voltage; P3HT; PCBM; Poly (3-Hexylthiophene); Polymer Films; Polymers; Power Conversion Efficiencies; Solar Cells; Work-Function; Work-Function Difference; Zinc Oxide
- A Ga, Al-doped zinc oxide (GAZO) buffer layer was applied to inverted polymer solar cells (PSCs) based on P3HT [poly(3-hexylthiophene)]:PCBM [[6,6]-phenyl C61-butyric acid methyl ester] blend films. The work function of the GAZO layer on indium-tin oxide (ITO) was measured to be 4.45 eV. The insertion of the GAZO layer between the ITO electrode and the P3HT:PCBM blend film in the inverted PSC led to an improved short-circuit current (Jsc), open-circuit voltage (Voc) and fill factor (FF) compared to those of the reference cell without GAZO layer. The Jsc enhancement in the inverted PSC with the GAZO layer was attributed to both the effective electron extraction and the increased crystallinity of P3HT, and the work function difference between Ag and GAZO layer induced the increase in Voc. The improved FF value was due to the lowered series resistance and elevated shunt resistance. Thus, the power conversion efficiency of the device with the GAZO layer was improved by more than 200% relative to the reference cell. Copyright © 2013 American Scientific Publishers All rights reserved.
- American Scientific Publishers
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- Convergence Research Center for Solar Energy1. Journal Articles
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