Solid-state dye-sensitized hierarchically structured ZnO solar cells |
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| Authors: | Jie Deng Yan-zhen Zheng Qian Hou Jian-Feng Chen Weilie Zhou Xia Tao |
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| Affiliation: | aKey Laboratory for Nanomaterials of the Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China;bResearch Center of the Ministry of Education for High Gravity Engineering & Technology, Beijing University of Chemical Technology, Beijing 100029, China;cAdvanced Materials Research Institute University of New Orleans New Orleans, LA 70148, USA |
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| Abstract: | A novel solid-state hierarchically structured ZnO dye-sensitized solar cell (DSC) was assembled by using TiO2 as filler in polyethylene oxide (PEO)/polyethylene glycol (PEG) electrolytes and ZnO nanocrystalline aggregates as photoanode film. Under optimized composite polyelectrolyte containing PEO/oligo-PEG/TiO2/LiI/I2 the photovoltaic performance of the solid-state ZnO DSCs was significantly better, with an overall conversion efficiency (η) of 1.8% under irradiation of 100 mW/cm2, which was higher than those of the cells with PEO/TiO2/LiI/I2 (η = 1.1%) or PEO/oligo-PEG/LiI/I2 electrolyte (η = 1.5%). Further, the hierarchically structured ZnO-based cell showed a higher η value of 2.0% under 60 mW/cm2 radiation. The morphologies, ionic conductivity of three different composite electrolytes and their performance to the DSCs were also studied by FESEM, I–V data, IPCE and EIS. |
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| Keywords: | Solid-state Dye-sensitized solar cell Hierarchically structured ZnO Composite electrolyte Photovoltaic performance |
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