[1] Citizen Holdings Co Ltd, Tokorozawa, Saitama 3598511, Japan
[2] Osaka Prefecture Univ, Dept Phys & Elect, Sakai, Osaka 5998531, Japan
[3] Osaka Prefecture Univ, Res Inst Mol Elect Devices, Sakai, Osaka 5998531, Japan
[4] Fuso Chem Co Ltd, Kyoto Res Ctr, Kyoto 6200853, Japan
[5] Osaka Municipal Tech Res Inst, Dept Elect Mat, Osaka 5368553, Japan