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Synthesis of self-light-scattering wrinkle structured ZnO photoanode by sol–gel method for dye-sensitized solar cells |
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| Authors: | C Justin Raj S N Karthick K V Hemalatha Soo-Kyoung Kim Byung Chul Kim Kook-Hyun Yu Hee-Je Kim |
| Institution: | 1. Department of Chemistry, Dongguk University-Seoul, Seoul, 100-715, Republic of Korea 2. Department of Electrical Engineering, Pusan National University, San 30, Jangjeong-Dong, Gumjeong-Ku, Busan, 609-735, South Korea 3. Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India 4. Department of Chemistry, Coimbatore Institute of Technology, Coimbatore, 641014, India |
| Abstract: | A special morphological zinc oxide (ZnO) photoanode for dye-sensitized solar cell was fabricated by simple sol–gel drop casting technique. This film shows a wrinkled structure resembling the roots of banyan tree, which acts as an effective self scattering layer for harvesting more visible light and offers an easy transport path for photo-injected electrons. These ZnO electrode of low thickness (~5 μm) gained an enhanced short-circuit current density of 6.15 mA/cm2, open-circuit voltage of 0.67 V, fill factor of 0.47 and overall conversion efficiency of 1.97 % under 1 sun illumination. This shows a high conversion efficiency and a superior performance than that of ZnO nanoparticle-based photoanode (η ~ 1.13 %) of high thickness (~8 μm). |
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