초록 열기/닫기 버튼
This paper reports the preparation of a novel polyimide (PI)-based holetransporting material comprising carbazole and arylamine moieties as the backbone of the polymer. A diamine monomer named 4,4'-(9H,9'H-[3,3'-bicarbazole]- 9,9'-diyl)dianiline is an electron-rich molecule which is suitable for achieving electrochromic materials. It is used to prepare an electrochromic carbazole-based PI via chemical imidization. The carbazole-based PI shows excellent thermal stability with a high decomposition temperature up to 500℃, refractive index of 1.74, and reasonable transparency of 85%. In addition, the PI exhibits characteristics similar to those of electrochromic materials such as violet-green emissions in the visible range when in solution form, highest occupied molecular orbital (HOMO) energy levels of ~5.4 eV, and a hole mobility of 7.44 × 10-4 cm2 V-1s-1. The excellent performance of the PI makes it a potential candidate for hole-transporting material in optoelectronic devices.
