2,2’雙取代與2,2’,7,7’四取代旋環雙芴材料之合成及其光電應用
Synthesis, Properties, and Optoelectronic Applications of Novel 2,2’and 2,2’,7,7’- Substituted 9,9’-Spirobifluorene Derivatives
Date Issued
2006
Date
2006
Author(s)
Liao, Yuan-Li
DOI
zh-TW
Abstract
we have designed and synthesized 9,9’-spirobifluorene-based materials and introduced different functional group at 2,2’ and 2,2’,7,7’ positions of 9,9’-spirobifluorene. All of these obtained materials adopted a bichromophoric system configured orthogonally via a chiral spiro center. The perpendicular arrangement can efficiently suppress cryastallization and improve thermal stability of the resulting materials. Large energy gap spiro-configured bifluorenes can be used as efficient emitters in UV OLEDs and as effective host materials for red electrophosphorescent devices. In addition, diarylamine substituted material DPAS was used together with TCTA as a co-hole transporting layer in highly efficient blue electrophosphorescent device. Materials emitting RGB colors can be readily accessed by introducing different donor and acceptor moieties. Among them, we have found some interesting spectroelectrochemical behavior of CNSDA, which shows high potential in applications of electrochromic device. In addition, we have designed mono- and bi-chromophore systems for investigating the electronic interactions within spiro-bridged systems. According to the observed, consecutive changes on absorption spectra from neutral sate to second oxidation state. We proposed the oxidation behavior of spiro-configured bichromophore systems is through a one-step-one-electron mechanism.
Subjects
旋環雙芴
Spirobifluorene
Type
thesis
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