Ren He, Ying-Ye Li, Jing-Xin Chen, Xue-Ling Zhao, Huan Tang, Li-Na Zhang, Yan-Jiao Shen, Feng Li, Lin Yang, De-Yuan Wei. Three-point and four-point mechanical bending test modeling and application in solar cells [J]. Acta Physica Sinica, 2019, 68(20): 208801-1