| 초록 |
The interfacial layers in Polymer solar cells (PSCs) are necessary for high performance because it is useful to match the energy level between electrode and active layer. Thus the multiple structures of PSCs are required, however, these structures are not favorable to roll-to-roll processes and need additional cost of production. In this study, the active layer and electron transport layer (ETL) were simultaneously deposited with vertical phase separation. The zinc oxide (ZnO) was selected as ETL. The zinc acetate solutions were mixed in blended active solution of poly(3-hexylthiophene (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). To analyze the phase separation, atomic force measurement, secondary ion mass spectroscopy and contact angle were measured. These results showed that the zinc atoms were vertically phase-separated due to difference of surface energy and density. These devices had similar performance compare to the device made by conventional method. |
