[20a-C601-1~10] 13.9 Compound solar cells

11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)

[20a-C601-9] Electronic Structure of ZnMgO/CIGS Interface

〇Norio Terada^2,1, Koki Fujimoto², Takehiko Nagai¹, Shogo Ishizuka¹, Jiro Nishinaga¹, Yukiko Kamikawa¹, Hajime Shibata¹ (1.AIST, 2.Kagoshima Univ.)

Keywords:

compound semiconductor-based solar cell,electronic structure,photoemission spectroscopy

Chemical bond nature of ZnMgO (ZMO) buffer grown on Cu(In,Ga)Se₂ (CIGS) absorber by pulsed laser deposition, and band alignment of the ZMO/CIGS interface have been investigated by means of in-situ PES/IPES. A large interface induced band bending and an adequately positive condition band offset are realized by controlling deposition condition of ZMO which reduces impurity-level in the ZMO layer. The results ensure that ZMO is one of the promising buffer materials for the CIGS-based solar cells.