1. GRINM Bohan (Beijing) Publisher Co., Ltd., GRINM Group Co., Ltd., No. 2 Xinjiekou Street, Xicheng District, Beijing 100088, P.R. China
2. Ningxia Key Laboratory for Photovoltaic Materials, Ningxia University, No. 489 Helanshan West Road, Yin-Chuan, Ningxia 750021, P.R. China.