| 초록 |
Spiro-OMeTAD as hole transporting material has been widely employed up to PCE = 22.1 %, but it is only processed in chlorinated or harmful solvents such as chlorobenzene, dichlorobenzene, or toluene, despite of its low molecular weight relative to polymeric HTMs. Therefore, it is necessity to replace it to green solvent processable HTM. Here, we report a green solvent processable, polymeric HTM consisting of benzodithiazole and benzo[1,2-b:4,5:b’]dithiophene. We design a novel D–A type conducting polymer to obtain its proper HOMO easily and to achieve its high hole mobility as we demonstrated, allowing effective hole extraction from perovskites to HTM and then hole transportation through HTM without Li-TFSI and t-BP, respectively. The resulting novel polymeric HTM is not only soluble in the various halogenated or harmful solvents but also highly soluble in a green solvent. In this talk, I will present a design strategy for a green solvent processable HTM and why it exhibits a highly stable device with a highest PCE in the absence of the dopants. [References] Adv. Energy Mater. 2017, ASAP. J. Am. Chem. Soc. 2017, ASAP. |
