| 초록 |
SnO2 possesses excellent properties such as high conductivity, high transparency, and suitable band alignment has recently attracted much attention as powerful cathode interlayer (CIL) for optoelectronic devices. Here, we report on low-temperature solution-processed SnO2 nanoparticles (NPs) for the use as CIL of inverted organic solar cells (iOSCs). The work function of SnO2 NPs using ultraviolet photoelectron spectroscopy measurements was found to be 4.01 eV, an outstanding feature that is necessary for suitable CIL. With SnO2 NPs as CIL, P3HT:PC60BM-based iOSCs showed the power conversion efficiency (PCE) of 2.9%. Moreover, the iOSC devices using SnO2 NPs as CIL showed excellent long-term device stabilities with the PCE was maintained at ~95% of its initial value after storing 10 weeks in ambient air. We believed this solution-processed SnO2 NPs are suitable for the low-cost, high throughput roll-to-roll manufacturing on flexible substrates for optoelectronic devices. |
