| 초록 |
Perovskite has attracted many researches due to its superior optical and electronic properties, accelerating the development of optoelectronics. Perovskite solar cells generally comprise transparent conducting oxide (TCO), compact layer, perovskite, hole transport layer (HTL), and counter electrode (CE). Among these components, developing new hole transport material (HTM) is important because conventional materials such as spiro-MeOTAD are expensive. A strategy to develop a novel polymeric HTM (TTB-TTQ) is reported. The resulting polymer is highly soluble in common organic solvents and exhibits good film formability. The addition of lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) salt and tert-butylpyridine (tBP) to TTB-TTQ results in a rough surface with a fibril structure and encourages charge transport. A perovskite solar cell with the highest power conversion efficiency (η), 14.1%, which is 22.6% greater than that of a device employing a spiro-MeOTAD is demonstrated. |
