Phase formation and control of morphology in sputtered Cu-In alloy layers |
| |
Authors: | CH Chung SD KimHJ Kim FO AdurodijaKH Yoon J Song |
| |
Institution: | a School of Materials Science and Engineering, Seoul National University, Seoul, 151-742, South Korea b Basic Research Lab., ETRI, 161 Gajeong-dong, Yuseong-gu, Daejon, 305-350, South Korea c Korea Institute of Energy Research, Taejon, 305-343, South Korea |
| |
Abstract: | The dependence of structural properties and surface morphology of Cu-In alloy layers on the composition and sputtering deposition sequence were investigated by X-ray diffraction, scanning electron microscopy and energy-dispersive X-ray spectroscopy. The properties of the co-sputtered alloy layers changed abruptly around the composition boundary when the Cu/In ratio reached 1/2. This can be explained by the effective heat of formation (EHF) model, which has been used to predict the sequence of phase formation for metal diffusion couples. The use of a co-sputtered alloy layer with a high In concentration was not suitable for fabricating solar cells, because the film had a very rough morphology due to large In islands formed on the CuIn2 phase. However, it was possible to minimize this phase by In sputtering followed by co-sputtering with a Cu/In ratio of 1 (Cu-In/In/Glass). This permitted the fabrication of a homogeneous Cu-In alloy layer, which was not possible through the simple co-sputtering. |
| |
Keywords: | 61 66 Dk 68 55 Jk 81 05 Bx 81 15 Cd |
本文献已被 ScienceDirect 等数据库收录! |
|