Nano-scale ZnO buffer layer for inkjet-printed polymer solar cells.
Zinc oxide (ZnO) was used as a buffer layer in the fabrication of polymer solar cells with the configuration of ITO/PEDOT:PSS/P3HT:PCBM/ZnO/Ag, in which the Ag cathode was prepared by inkjet printing using silver ink. Due to the hydrophobic nature of the P3HT:PCBM active layer surface, the hydrophilic silver ink cannot be coated directly on the top of the P3HT:PCBM layer. To overcome this problem, ZnO particles, prepared in a simple solution method by using polyethylene glycol (PEG) surfactant molecules, were used as a buffer layer between the P3HT:PCBM layer and Ag cathode. The present study discusses and compares the performance of the solar cells with and without the ZnO buffer layer.
Eom
Seung Hun
SH
School of Semiconductor and Chemical Engineering, Research Center of Industrial Technology, Chonbuk National University, Jeonju 561-756, Korea.
Senthilarasu
S
S
Yoon
Sung Cheol
SC
Lee
J
J
Lee
Soo-Hyoung
SH