具有高激子利用效率的给/受体型蓝光聚合物的设计合成

项目名称： 具有高激子利用效率的给/受体型蓝光聚合物的设计合成

项目编号： No.51473054

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 杨伟

作者单位： 华南理工大学

项目金额： 83万元

中文摘要： 突破激子统计限制的局域/电荷转移杂化（HLCT）态新原理，既保留了CT态激子弱束缚特性，同时又具有较大的波函数重叠和高辐射跃迁速率，据此有望发展低成本、高性能的新一代有机电致发光材料。給/受体型结构单元多用来合成聚合物太阳电池的窄带隙给体材料，将其用于蓝光聚合物分子设计是一个全新的挑战，也为聚合物荧光材料器件效率及稳定性的提高提供了一种新思路。S,S-二氧-二苯并噻吩是一个发光效率高、稳定性好的蓝光单元，以其为基础构筑的新型给/受体型蓝光单元，在性能上将有很大的提升空间；将其引入宽带隙聚合物分子链中，有可能获得高激子利用效率的的蓝光聚合物。本项目基于HLCT态新原理，设计若干基于S,S-二氧-二苯并噻吩的给/受体型蓝光单元。通过模型化合物理论计算、聚合物分子设计、HLCT态发光机制及其相互影响的研究,指导合成具有高激子利用效率的给/受体型蓝光聚合物，探讨解决蓝光聚合物实用化问题的新途径。

中文关键词： 给/受体单元；蓝光聚合物；高激子利用率；局域/电荷转移杂化态；聚合物电致发光器件

英文摘要： The hybridized local and charge-transfer (HLCT) excited state not only retains the CT state character as weakly bound exciton, but also possesses a very large wavefunction overlap to maintain a certain rate of radioactive transition. Accordingly, it will be expected to devolop the next generation organic light-emitting diode (OLED) materials with low-cost and high performances. Donor-acceptor(D-A) type building blocks are commonly used as the synthsis of narrow band gap electron-donor materials for polymer solar cells, and therefore, it is a great challenge to design the blue light-emitting polymers used D-A type unit. Also, it can open a new direction to improve the efficiency and stability of light-emitting polymers. Dibenzothiophene-S,S-dioxide (SO) is an excellent blue emitters with high performances due to its high fluorescence quantum yields and excellent chemical and thermal stability, which can be constructed D-A type building block as promising blue emitter. And the blue light emitting polymers with the high device efficiency and stability will be obtained by intruducing D-A type building block into the wide band gap polymer backbone. Based on the theory of HLCT excited state, this project will design and synthesize a series of blue light-emitting polymers containing the SO based D-A type blue emitters. And the theoretical model calculation, polymer molecular design and the luminescence mechanism of HLCT excited state will be carried out, in order to exploit D-A type blue emitting polymers with high exciton ultilization efficiency, and further explore a new way on the the practical application of blue light-emitting polymers.

英文关键词： D/A unit;blue-emitting polymer;high exciton utilization efficiency;HLCT excited state;PLED