[8p-Z09-1~18] 22.1 Joint Session M "Phonon Engineering"

[8p-Z09-10] Fermi Level Dependence of a Working Electrode in a Sensitized Thermal Cell

〇Sachiko Matsushita¹, Seiya Sugawara¹, Takumi Ikeda¹, Takuma Araki¹, Hayato Sekiya¹, Haruki Kohata¹, Toshihiro Isobe¹, Akira Nakajima¹ (1.Tokyo Tech.)

Keywords:Thermal energy, renewable energy, dye-sensitized solar cell

A sensitized thermal cell is a new thermal energy device based on a dye-sensitized solar cell; thermally excited carriers in a semiconductor are used instead of photon-excited carriers in a dye [1, 2]. In semiconductor-sensitized batteries, open-circuit voltage in thermal excitation is lower than in optical excitation [3, 4], but the reason was unclear. By changing the doping amount of the electron transport layer, we experimentally show that the voltage in thermal excitation was depending on the Fermi level of “entire” semiconductor electrode [5].
[1] S. Matsushita, A. Tsuruoka, E. Kobayashi, T. Isobe, A. Nakajima, Mater. Horiz. 2017, 4, 649–656.
[2] S. Matsushita, SPIE Defense + Commercial Sensing 2020, 11387. (invited)
[3] S. Matsushita, S. Sugawara, T. Isobe, A. Nakajima, ACS Appl. Energy Mater. 2019, 2, 13-18.
[4] Y. Inagawa, T. Isobe, A. Nakajima, S. Matsushita, J. Phys. Chem. C 2019, 123, 12135-1214.
[5] S. Matsushita, S. Sugawara, T. Ikeda, T. Araki, H. Sekiya, H. Kohata, T. Isobe, A. Nakajima, Chem. Letter., in press. (https://www.journal.csj.jp/doi/abs/10.1246/cl.200322).