| 초록 |
Organic solar cells (OSCs) have recently received significant attention as low cost power sources for the next generation. Nevertheless, full commercialization of OSCs is faced with a difficulty due to durability limitation. The standard hole transport layer (HTL), poly-3,4-ethylenedioxy-thiophene:poly(styrene sulfonate) (PEDOT:PSS), could be a major factor limiting the device durability and performance. Here we study on enhancing device durability using reduced graphene oxide (pr-GO) by p-toluenesulfonyl hydrazide(p-TosNHNH2) as HTL. The pr-GO has a more efficient passivation property against oxygen and moisture compared with PEDOT:PSS. We applied pr-GO as HTL to new donor-based OSCs. Copolymer with thieno[3,4-b]thiophene and benzodithiophene units (PTB7-F40) is a known material as one of donors having the highest PCE. We expect that PTB7-F40 filmed device show enhanced durability and high performance by using pr-GO instead of PEDOT:PSS. Detailed investigation would be presented. |
