| 초록 |
In this study, we demonstrated that the asymmetric alkoxy substituted polymer (asy-PBTBDT) to approach superior solubility in the edible food additive 2-MA relative to the symmetric polymer(PBTBDT). The concept resulted in asymmetry in the monomer itself, leading to irregularity despite being a homopolymer.). When asy-PBTBDT was applied to perovskite as Hole transporting material, high PCE was showed with chlorobenzene and environmentally friendly solvents without additives. The new HTM is well matched with perovskites in terms of energy levels and attains a high μh (1.13 × 10–3 cm2/(V s)) even without the use of dopants. Using the HTM, we produced robust PSCs with 18.3% efficiency (91% retention after 30 days without encapsulation under 50%–75% relative humidity) without dopants. These materials have important industrial significance because of their high processability, reproducibility, stability and efficiency in edible solvents. |
