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Optimization of an Electron Transport Layer to Enhance the Power Conversion Efficiency of Flexible Inverted Organic Solar Cells

Lee, Kang Hyuck and Kumar, Brijesh and Park, Hye-Jeong and Kim, Sang-Woo (2010) Optimization of an Electron Transport Layer to Enhance the Power Conversion Efficiency of Flexible Inverted Organic Solar Cells. Nanoscale Research Letters, 5 (12). pp. 1908-1912.

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Official URL: http://www.springerlink.com/content/h4175g70261847...

Abstract

The photovoltaic (PV) performance of flexible inverted organic solar cells (IOSCs) with an active layer consisting of a blend of poly(3-hexylthiophene) and [6, 6]-phenyl C61-butlyric acid methyl ester was investigated by varying the thicknesses of ZnO seed layers and introducing ZnO nanorods (NRs). A ZnO seed layer or ZnO NRs grown on the seed layer were used as an electron transport layer and pathway to optimize PV performance. ZnO seed layers were deposited using spin coating at 3,000 rpm for 30 s onto indium tin oxide (ITO)-coated polyethersulphone (PES) substrates. The ZnO NRs were grown using an aqueous solution method at a low temperature (90°C). The optimized device with ZnO NRs exhibited a threefold increase in PV performance compared with that of a device consisting of a ZnO seed layer without ZnO NRs. Flexible IOSCs fabricated using ZnO NRs with improved PV performance may pave the way for the development of PV devices with larger interface areas for effective exciton dissociation and continuous carrier transport paths.

Item Type:Article
Subjects:Material Science > Functional and hybrid materials
Technology > Nanotechnology and energy applications
Divisions:Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:10406
Deposited By:JNCASR
Deposited On:10 May 2011 12:32
Last Modified:10 May 2011 12:32

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