The Influence of Different Annealing Temperatures on Graphene-Modified TiO2for Dye-Sensitized Solar Cell
| Autor: | Yu-Jen Lin, Chin-Hui Huang, Chia-Ming Chu, Yu-Hsun Nien, Li-Hong Tai, Yi-Hung Liao, Jung-Chuan Chou |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Graphene business.industry Annealing (metallurgy) Analytical chemistry Heterojunction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Computer Science Applications Dielectric spectroscopy law.invention Dye-sensitized solar cell law Solar cell Optoelectronics Electrical and Electronic Engineering Nyquist plot 0210 nano-technology business Diffractometer |
| Zdroj: | IEEE Transactions on Nanotechnology. 15:164-170 |
| ISSN: | 1941-0085 1536-125X |
| DOI: | 10.1109/tnano.2015.2510081 |
| Popis: | In this study, graphene/TiO2 composite films at different annealing temperatures from 450 to 650 °C acted as photoelectrode of dye-sensitized solar cell (DSSC). The graphene/TiO2 composite films were characterized by scanning electronic microscopy, X-ray diffractometer, and electrochemical impedance spectroscopy. The Nyquist plot is built to simulate the redox reaction of internal device at the heterojunction by an equivalent circuit model. It is useful to analyze the component structure and promote photovoltaic conversion efficiency of DSSC. According to the experiment results, the optimal annealing temperature of graphene/TiO2 composite film was 550 °C, where the open-circuit voltage was 0.74 ± 0.01 V, the short-circuit current density was 14.17 ± 0.32 mA/cm2, the fill factor was 51.00 ± 1.95%, and the photovoltaic conversion efficiency was 5.34 ± 0.12%. |
| Databáze: | OpenAIRE |
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