[15a-B3-1~9] 13.2 Exploratory Materials, Physical Properties, Devices

▲ [15a-B3-6] Characterization of undoped-BaSi₂ on textured Si (001) substrate grown by molecular beam epitaxy

〇Tianguo Deng¹, Ryota Takabe¹, Suguru Yachi¹, Zhihao Xu¹, Miftahullatif Emha Bayu¹, Kaoru Toko¹, Noritaka Usami², Takashi Suemasu¹ (1.Univ. Tsukuba, 2.Nagoya Univ.)

Keywords:barium disilicide, textured substrate

Barium disilicide (BaSi₂) has attractive features for solar cell application such as a suitable band, and a large minority-carrier lifetime (τ ~ 10 μs) and a large minority-carrier diffusion length (L ~ 10 μm). Power conversion efficiency (η) was expected to be larger than 25% only in a 2-μm-thick BaSi₂ pn junction diode. To ensure both light-trapping and epitaxy of BaSi₂ on Si(111) faces, textured Si(001) substrates with Si(111) faces were formed. In this study, we attempted to grow BaSi₂ on such a textured Si(001) substrate, and compared with the results obtained for BaSi₂ on Si(111).