| 초록 |
The interfacial modifier (IM) has been used to change surface properties of ZnO as a cathode buffer in inverted organic solar cells. Applied IM changed the surface property of metal oxide from hydrophilic to hydrophobic, as well as induced a surface dipole which can tune the energy levels of metal oxide. The device (0.37cm2) with IM showed 7% enhancement in power conversion efficiency (PCE=3.65%) by increasing Voc and FF. Moreover, the average performance in large-area device (10.2cm2) with IM showed 2 times higher PCE and lower deviation between devices, comparing with the devices without IM, owing to pinhole-free and uniform morphology in active layer. |
