1. Solar Energy Technology Laboratory, National Electronics and Computer Technology Center, 112 Thailand Science Park, Phahonyothin Road, Klong 1, Klong Luang, Pathumthani 12120, Thailand
2. PTT Research & Technology Institute, PTT Public Company Limited, 70 Moo2 Phahonyothin Road, Sanubtup, Wangnoi, Ayutthaya 13170, Thailand