[16p-P3-1~23] 6.2 Carbon-based thin films

▲ [16p-P3-22] Study on minority-carrier lifetime in ultrananocrystalline diamond/hydroganated amorphous carbon composite films

〇(M1)Naofumi Nishikawa¹, Satoshi Takeichi¹, Takanori Hanada¹, Syuya Tategami², Anri Iwamoto², Hideaki Takeda², Atsuhiko Hukuyama², Tsuyoshi Yoshitake¹ (1.Kyushu Univ., 2.Univ. of Miyazaki)

Keywords:thin films

Ultrananocrystalline diamond (UNCD)/hydrogenated amorphous carbon (a-C:H) composite (UNCD/a-C:H) films comprise a large number of grains with diameters of less than 10 nm and an a-C:H matrix. The absorption coefficient is a new candidate semiconductor for photovoltaics. On the other hand, the minority carrier lifetime, which is one of the most important factors in the photovoltaic action, has not been investigated for UNCD/a-C:H yet. In this work, the minority-carrier lifetimes of typical samples were measured by employing a μ-PCD apparatus.