https://scholars.lib.ntu.edu.tw/handle/123456789/598301
標題: | Synthesized tio2 mesoporous by addition of acetylacetone and graphene for dye sensitized solar cells | 作者: | Chang C.-H Chuang C.-H Zhong D.-Y Lin J.-C Sung C.-C Hsu C.-Y. CHIA-CHI SUNG |
關鍵字: | Band gap;DSSC;Photovoltaic efficiency;TiO2 mesoporous | 公開日期: | 2021 | 卷: | 11 | 期: | 7 | 來源出版物: | Coatings | 摘要: | This study mixed acetylacetone (Acac, 1, 2, and 3 mL) and graphene powder (GP, 0 wt.%, 0.001 wt.%, 0.003 wt.% and 0.005 wt.%) with TiO2 mesoporous (TiO2 powders: 20 g and particle size ~30 nm) to enhance the optoelectronic performances of dye sensitized solar cells (DSSC). Sponge-like structure TiO2 mesoporous layers is a requirement for obtaining high efficiency DSSC, which ia synthesized by spin-coating techniques. The dense TiO2 blocking layer (using peroxo-titanium complex) has a uniform, dense structure and completely adheres to the substrates to avoid charge recombination. The X-ray diffraction (XRD) and transmission electron microscopy (TEM) analyses of the TiO2 films display the anatase type phase with preferred orientation along the (101) direction. After being ball milled, the TiO2 mesoporous particle size almost remains unchanged. For mixing the Acac with TiO2, the Raman intensity relatively increased, and the band gap energy (Eg) value decreased from 3.223 eV (for pure TiO2 ) to 3.076 eV (for 2 mL Acac). Raman spectroscopy is used to evaluate the GP elements. It can be seen the intensity ratio (ID/IG) and (I2D/IG) was enhanced when the GP concentration increased. Using mixed Acac 2 mL and GP 0.003 wt.% with a TiO2 mesoporous, led to increases in the open circuit voltage (VOC), short circuit current density (JSC) and fill factor (FF). If a fluorine-doped tin oxide is used instead of an indium tin oxide glass substrate, the photovoltaic efficiency of DSSC increases from 5.45% to 7.24%. ? 2021 by the authors. Licensee MDPI, Basel, Switzerland. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85110316521&doi=10.3390%2fcoatings11070796&partnerID=40&md5=6be3d5728372410db364e8b25ca4dffa https://scholars.lib.ntu.edu.tw/handle/123456789/598301 |
ISSN: | 20796412 | DOI: | 10.3390/coatings11070796 |
顯示於: | 工程科學及海洋工程學系 |
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