SOLAR ENERGY MATERIALS AND SOLAR CELLS, vol. 95, no. 4, page. 1146 - 1150, 2011-04
JAPANESE JOURNAL OF APPLIED PHYSICS, vol. 47, no. 2, page. 862 - 866, 2008-02
SOLID-STATE ELECTRONICS, vol. 52, no. 1, page. 1 - 6, 2008-01
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, vol. 154, no. 9, page. H782 - H788, 2007-01