Recent progress of colloidal quantum dot based solar cells
Wei Huiyun1, Li Dongmei2, 3, †, Zheng Xinhe1, ‡, Meng Qingbo2, 3
       

(color online) The introduction of n-PCBM buffer layer leads to enhanced device performance. The black lines represent the control device, and the red lines represent the n-PCBM modified device.[111]