美国芝加哥大学Luping Yu团队研究发现，通过微调聚合物骨架实现高效发光晶体管的光致发光和电荷传输之间的协同作用。相关研究成果于2021年3月23日发表于国际顶尖学术期刊《美国化学会杂志》。

由于缺乏开发具有强荧光和高双极性电荷迁移率的高性能聚合物材料的设计原则，限制了其在有机发光晶体管(OLETs)、电泵有机激光器和其他先进电子器件中的性能。通过弱受体（TPTQ或TPTI）和弱施主（芴（F）或咔唑（C））的共聚，制备了一系列具有发光和电荷传输性能的半共轭聚合物。

结果表明，新型共聚物TPTQ-F具有较高的平面度、结晶度和链间聚集平衡，有助于提高双极性电荷迁移率和荧光量子产率。TPTQ-F在溶液处理的多层OLET器件中表现出优异的性能，外量子效率（EQE）为5.3%。

附：英文原文

Title: Synergy between Photoluminescence and Charge Transport Achieved by Finely Tuning Polymeric Backbones for Efficient Light-Emitting Transistor

Author: Dafei Yuan, Mohammad A. Awais, Valerii Sharapov, Xunshan Liu, Andriy Neshchadin, Wei Chen, Luping Yu

Issue&Volume: March 23, 2021

Abstract: The lack of design principle for developing high-performance polymer materials displaying strong fluorescence and high ambipolar charge mobilities limited their performance in organic light-emitting transistors (OLETs), electrically pumped organic laser, and other advanced electronic devices. A series of semiladder polymers by copolymerization of weak acceptors (TPTQ or TPTI) and weak donors (fluorene (F) or carbazole (C)) have been developed for luminescent and charge transporting properties. It was found that enhanced planarity, high crystallinity, and a delicate balance in interchain aggregation obtained in the new copolymer, TPTQ-F, contributed to high ambipolar charge mobilities and photoluminescent quantum yield. TPTQ-F showed excellent performance in solution-processed multilayered OLET devices with an external quantum efficiency (EQE) of 5.3%.

DOI: 10.1021/jacs.1c01659

Source: https://pubs.acs.org/doi/10.1021/jacs.1c01659