1. Progress toward 20% efficiency in Cu(In,Ga)Se2 polycrystalline thin-film solar cells
2. Y. Hagiwara, T. Nakada, A. Kunioka, Improved Jsc in CIGS thin-film solar cells using a transparent conducting ZnO:B window layers, Tech. Dig. 11th International Photovoltaic Science and Engineering Conference 1999, Sapporo, pp. 83–84.
3. T. Negami et al., Presented in the 11th International Photovoltaic. Science and Engineering Conference, 1999, Sapporo.
4. T. Nakada, K. Furumi, K. Sonoda, A. Kunioka, Polycrystalline Cu(In,Ga)Se2 thin film solar cells with chemically deposited (CdS, ZnS) buffer layers, Proceedings of the Second World Conference on Photovoltaic Conversion, 1998, pp. 1173–1176.
5. Direct evidence of Cd diffusion into Cu(In, Ga)Se2 thin films during chemical-bath deposition process of CdS films