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Application of doping graphene quantum dots and gold nanoparticles on dye-sensitized solar cells
Modern Physics Letters B ( IF 1.8 ) Pub Date : 2021-11-22
Kao-Wei Min, Ming-Ta Yu, Chi-Ting Ho, Pin-Ru Chen, Jenn-Kai Tsai, Tian-Chiuan Wu, Tung-Lung Wu

The doctor blade coating method is used to prepare dye-sensitized solar cells (DSSCs) and dope the original titanium dioxide (TiO2, P25) photoanode (PA) with single-layer graphene (G), graphene quantum dots (GQDs), and gold (Au) nanoparticles in this research. The results show that doping PAs with G, GQDS, and Au effectively increases the short-circuit current density (Jsc), conversion efficiency (η), and decreases the internal structure impedance (Rk) of DSSCs. Jsc increases from 13.62 to 17.02, 15.22, 16.05 mA/cm2, while η (%) increases from 6.36 to 7.50, 7.08, 7.04% when doping G, GQDs, and Au, respectively. The analysis of Electrochemical Impedance Spectroscopy (EIS) reveals that the doping decreases Rk from 11.28 to 8.36, 8.78, 8.54 Ω, respectively. Then, the titanium dioxide (TiO2)-doped G-GQDs, G-Au, and QDs-Au on DSSCs influence Jsc that increases to 5.45, 15.37, and 15.31 mA/cm2, respectively. In this case, the values of η are found to be 7.21%, 7.35%, and 7.00%, while those of Rk are 8.44, 8.63, and 9.18 Ω. The values of Jsc and η are highest but that of Rk are lowest when doping with G, which proves that the photoanode of the DSSC effectively activates the photogenerated electrons in the film by doping single-layer graphene and TiO2 captures its electrons through graphene. The decreasing electron–hole recombination rate allows the photogenerated electrons to be quickly transferred to the external circuit. As a result, the efficiency of DSSCs is improved.



中文翻译:

掺杂石墨烯量子点和金纳米粒子在染料敏化太阳能电池上的应用

采用刮刀涂布法制备染料敏化太阳能电池(DSSCs),并在原始二氧化钛(TiO 2、P25)光阳极(PA)上掺杂单层石墨烯(G)、石墨烯量子点(GQDs)和本研究中的金 (Au) 纳米粒子。结果表明,用 G、GQDS 和 Au 掺杂 PAs 有效地增加了短路电流密度(Jsc), 转换效率 (η), 并降低内部结构阻抗 (电阻) 的 DSSC。 Jsc从 13.62 增加到 17.02、15.22、16.05 mA/cm 2,而η(%) 在掺杂 G、GQD 和 Au 时分别从 6.36、7.08、7.04% 增加到 7.50、7.08、7.04%。电化学阻抗谱 (EIS) 的分析表明掺杂减少电阻 从 11.28 到 8.36、8.78、8.54 Ω, 分别。然后,二氧化钛 (TiO 2 ) 掺杂的 G-GQDs、G-Au 和 QDs-Au 对 DSSCs 的影响Jsc分别增加到 5.45、15.37 和 15.31 mA/cm 2。在这种情况下,值η 分别为 7.21%、7.35% 和 7.00%,而 电阻 是 8.44、8.63 和 9.18 Ω. 的价值Jscη 是最高的,但 电阻掺杂 G 时 最低,这证明 DSSC 的光阳极通过掺杂单层石墨烯有效地激活了薄膜中的光生电子,TiO 2通过石墨烯捕获其电子。降低的电子-空穴复合率允许光生电子快速转移到外部电路。因此,提高了 DSSC 的效率。

更新日期:2021-11-22
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