| 초록 |
Efficient bulk heterojunction (BHJ) polymer solar cell (PSC) based on a blend of PTB7-Th:PC71BM as an active absorbing layer has been fabricated by using solution-processed molybdenum oxide (s-MoOx) as an anode buffer layer. Generally, the MoOx layer, fabricated by conventional sol-gel method (c-MoOx), needs a post-thermal treatment around 200°C in air to archive better quality thin film. However, the usage of high temperature makes the MoOx layer hard to employ in flexible electronics. In this work, we developed annealing free modified s-MoOx and have applied on both conventional and inverted PSC. The PSC with non-annealed c-MoOx layer showed poor efficiency of 1.37%. If the c-MoOx layer was annealed at 200oC before active layer deposition, the efficiency was recovered to normal range that typically shown in conventional PTB7-Th:PC71BM solar cells. In contrast, the PSC with our modified s-MoOx prepared using MoO2(acac)2 exhibited higher efficiency without high-temperature annealing. |
