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Efficiency Variation of Composite Films Dye-Sensitized Solar Cells at Different Annealing Temperature

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Due to low materials cost, ease of production and potential for reasonable power conversion towards commercial applications, dye-sensitized solar cells (DSSCs) are extensively studied as a good replacement to conventional inorganic solar cells. The present study highlights the advancement of new structures in order to further improve their energy conversion efficiency. Therefore, multilayer thin films of ZnO/TiO2 are prepared by a sol–gel spin coating process and annealed at different temperatures 450 °C, 550 °C and 650 °C. In particular, the energy conversion efficiency (solar to electric) of ZnO/TiO2 anodes annealed at 650 °C obtained reaches 2.29%, with a fill factor (FF) of 0.73, an open-circuit voltage (V OC) of 617 mV and a short-circuit current density (J SC) of 4.96 mA/cm2, that is greater compared to the results achieved at annealing temperatures of 450 °C (0.93%) and 550 °C (1.12%) respectively. Thus, we observe an improved performance at higher annealing temperatures which is related to an increased film porosity and photoanode surface area, allowing higher amounts of dye to be adsorbed.
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Document Type: Research Article

Publication date: July 1, 2018

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  • Journal of Nanoelectronics and Optoelectronics (JNO) is an international and cross-disciplinary peer reviewed journal to consolidate emerging experimental and theoretical research activities in the areas of nanoscale electronic and optoelectronic materials and devices into a single and unique reference source. JNO aims to facilitate the dissemination of interdisciplinary research results in the inter-related and converging fields of nanoelectronics and optoelectronics.
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