Low-temperature synthesis of ZnO nanoparticles for inverted polymer solar cell application
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Zinc oxide (ZnO) nanoparticles were synthesized by a simple wet chemical method at low temperature. Morphologies, crystalline structure, and optical transmission of ZnO nanoparticles were investigated. The results showed that the average diameter of as-synthesized ZnO nanoparticles was about 4.9 nm, the nanoparticles were wurtzite-structured (hexagonal) ZnO and had optical band gap of 3.28 eV. Very high optical transmission (>80 %) in visible light region of ZnO nanoparticulate thin films was achieved. Furthermore, an inverted polymer solar cell consisted of ZnO nanoparticles and polymer were fabricated. The device exhibited an open circuit voltage (Voc) of 0.50 V, a short circuit current density (Jsc) of 1.76 mA/cm2, a fill-factor of 38 %, and a power conversion efficiency of 0.42 %.
KeywordsSolar Cell Power Conversion Efficiency Zinc Acetate Dihydrate Short Circuit Current Density Hybrid Solar Cell
This work was partially supported by the National Natural Science Foundation of China (Grant No. 11304192), the Natural Science Foundation of the Education Bureau of Shaanxi Province, China (Grant No. 2013JK1113), and the Scientific Research Foundation of Shaanxi University of Technology (Grant No. SLGQD13-9). The author also gratefully acknowledges the friend help from Prof. Junsheng Yu, from School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC).