[19p-W531-1~19] 12.5 Organic solar cells

[19p-W531-5] Anisotropic optical absorption and photoinduced electron transfer of CdSe quantum dots adsorbed on single crystal rutile TiO₂

〇Taro Toyoda^1,5, Yindeesuk Witoon¹, Keita Kamiyama², Kenji Katayama³, Shuzi Hayasa^4,5, Qing Shen^1,5 (1.Univ. Electro-Commun, 2.Bunkoukeiki Co., Ltd, 3.Chuo Univ., 4.Kyushu Inst. Tech., 5.JST-CREST)

Keywords:semiconductor quantum dot,single crystal rutile titanium dioxide,photoinduced electron transfer

Semiconductor quantum dots (QDs) have many desirable characteristics for use as sensitizers, such as enabling tuning of the bandgap based on the quantum confinement effect, a higher extinction coefficient, and facilitating charge injection as a result of the large dipole moment. In this presentation, we describe the exponential optical absorption and photoinduced electron transfer of CdSe quantum dots adsorbed on single crystal rutile TiO₂. The results show that the exponential optical absorption and photoinduced electron transfer depend on the crystal orientation of single crystal rutile TiO₂ substrate. Moreover, the recombination probability of photoinduced electron transfer depends on the crystal orientation of single crystal rutile TiO₂ substrate.