[7p-S21-1~22] 13.10 Compound solar cells

△ [7p-S21-11] Characterization of the Photovoltaic Devices from the Phase of the Emitted THz Wave

〇Keita Miyagawa¹, Masaya Nagai¹, Changsu Kim², Hidefumi Akiyama², Yoshihiko Kanemitsu³, Masaaki Ashida¹ (1.Osaka Univ., 2.Univ. Tokyo, 3.Kyoto Univ.)

Keywords:photovoltaic device, THz wave

Since THz waveform directly reflects picosecond drift current in the active layer just after the photoexcitation, evaluation of its radiation from photovoltaic devices generated by ultrashort optical pulse excitation is powerful for the characterization of the solar cells. We investigate the THz radiation from the photovoltaic devices with the different structures and report that relation between the external quantum efficiency and THz waveforms.