Author/Authors :
Jin Young Oh، نويسنده , , Tae Il Lee، نويسنده , , Woo Soon Jang، نويسنده , , Soo Sang Chae، نويسنده , , Jee Ho Park، نويسنده , , Hyun-Woo Lee، نويسنده , , Jae-Min Myoung، نويسنده , , Kie Moon Song، نويسنده , , Hong Koo Baik، نويسنده ,
Abstract :
The role of [6,6]-phenyl C61 butyric acid methyl ester (PCBM) as an n-type homologue buffer layer (HBL) was investigated in a bulk-heterojunction solar cell. The n-type HBL was inserted between the photoactive layer and the cathode. We found that the n-type HBL formed an ideal contact between the photoactive layer and the cathode, enhancing the rectifying ability of the device. In addition, the enlarged donor/acceptor interface between the bulk-heterojunction layer and the n-type HBL generated an additional photocurrent through an interdiffusion phenomenon. A device with the controlled n-type HBL (30 nm) had an enhanced power conversion efficiency of nearly 40% compared to the reference device.
Keywords :
Transfer-printing , Organic solar cell , PCBM , Homologue buffer layer , interdiffusion , Bulk-heterojunction
