平成31年度日本学術振興会サマープログラムより吉田研究室に滞在していたAndreas RINGLEBさん（ドイツ、ギーセン大学博士課程学生）の「Mgドープ酸化亜鉛による色素増感太陽電池の高電圧化」
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Influence of Mg-doping in ZnO Photoanodes on their Characteristics in Dye-Sensitized Solar Cells
Andreas Ringleb, Raffael Ruess, Nico Hofeditz, Wolfram Heimbrodt, Tsukasa Yoshida and Derck Schlettwein
https://pubs.rsc.org/en/Content/ArticleLanding/2021/CP/D1CP00179E#!divAbstract
<Abstract>
Dye-sensitized solar cells (DSSCs) based on ZnO photoanodes have, despite extensive research, lacked behind cells based on TiO2, which is due to generally lower open-circuit voltages VOC and fill factors. Here, DSSCs have been prepared using Mg-doped ZnO (MZO) photoanodes based on nanoparticles, thin films or ZnO-MZO core-shell-type nanoparticles with varying Mg-concentration. The cells were studied in detailed photoelectrochemical and photoluminescence experiments. It was confirmed that VOC was significantly increased by Mg-doping. A clear influence of the Mg-concentration was also revealed on the transport and recombination of electrons in MZO, leading to higher cell performance at low and lower cell performance at high concentrations of Mg in MZO. Nanoparticles with a core of pure ZnO and a shell of MZO offered a way to lower the influence of an increased transport resistance in MZO and to capitalize on the significantly improved VOC.
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