Optimizing the performance of inverted type hybrid organic solar cell based on ZnO/P3HT with various polymer deposition parameters
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Various polymer deposition parameters have been investigated to improve the overall performance of the inverted type hybrid organic solar cells based on zinc oxide (ZnO)/poly(3-hexylthiophene) (P3HT). The polymer was deposited onto fluorine-doped tin oxide/ZnO nanorod arrays (NRAs) substrates via spin coating technique and followed by deposition of silver (Ag) using electron gun evaporation technique to build the devices. The objective of this work is to achieve the optimum device performance by selecting the best polymer concentration (25–40 mg/ml), spin coating speed (500–2000 rpm) and diluted polymer concentration (1–4 mg/ml) for ZnO NRAs surface modification. Experimental results showed that the device with P3HT concentration of 35 mg/ml, spin coating speed of 1000 rpm and ZnO NRAs surface modification with 1 mg/ml diluted P3HT solution exhibited the highest power conversion efficiency of 0.27 %. The surface roughness, P3HT top layer thickness and P3HT infiltration contributed to the significant photovoltaic performance improvement.
KeywordsPower Conversion Efficiency Photovoltaic Performance High Power Conversion Efficiency Exciton Dissociation P3HT Layer
This work has been conducted under the financial support of Ministry of Higher Education Malaysia under Research Grant FRGS/2/2013/SG02/UKM/02/6. The authors would like to thank Mr. Lahudi from the School of Applied Physics, Universiti Kebangsaan Malaysia for Ag via e-gun evaporation.
- 1.M.C. Scharber, N.S. Sariciftci, 2013 Prog. Polym. Sci. 38, 1929–1940 (2013)Google Scholar