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Carbazole-Based Polyimide as a Hole-Transporting Material for Optoelectronic Applications
Thi Kieu Trang Tu,Sabrina Aufar Salma,정미진,김주현,정연태,제갈영순,임권택 한국고분자학회 2021 Macromolecular Research Vol.29 No.10
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.
High-refractive index of crosslinked polyimide for matching film in optoelectronic device
박한솔,( Tu Thi Kieu Trang ),이시윤,박찬,임권택 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
A high-refractive index polymer of polyimide was prepared by imidization in removing water. Initially, the poly(amic acid) (PAA) was simply and quickly synthesized by the reaction between 4,4'-(hexa-fluoroisopropylidene) diphthalic anhydride (6FDA) and bis(3-aminophenyl) sulfone (3DDS). Next step, PAA was transformed to polyimide (PI). Finally, the polyimides were connected together to form network by cross-linking agent. This polymer network was characterized by FT-IR, GPC, TGA, transmittance and refractive index. With the high-refractive-index and thermal, flexible characteristic, this novel polyimide could be potential material to be utilizing as the outcoupling layer, the hole transport layer or the emitting layer in optoelectronic device applications.