俄罗斯弗鲁姆金物理化学与电化学研究所Alexey R. Tameev团队，报道了荧光发射重吸收增强聚芴共聚物/PTCDI异质结中的光电流。相关研究成果于2024年10月29日发表在国际知名学术期刊《中国高分子科学杂志》。

共聚芴因其能够形成具有可调光学和电学性能的薄膜而备受关注。

该文合成了聚芴与吸电子二氰基二苯乙烯和二氰基菲部分的共聚物，并通过电子能谱、循环伏安法、电学和光电测量对它们的薄膜进行了表征。首次测量了共聚物中电荷载流子的迁移率，受体组分提供了10^-6 cm²·V^-1·s^-1量级的平衡电子和空穴迁移率。

基于共聚物/PTCDI异质结的光电探测器显示，由于PTCDI的吸收，光响应带延伸到绿色区域，共聚物紫外蓝色吸收带中的光电流增加，这与PTCDI中共聚物的光致发光吸收有关。

本文所提出的提高聚合物基光电探测器性能的方法，在有机光电子学中很有前景。

附：英文原文

Title: Photocurrent in the Polyfluorene Copolymer/PTCDI Heterojunction Enhanced by Reabsorption of Fluorescence Emission

Author: Dmitriy A. Lypenko, Alexey E. Aleksandrov, Artem V. Dmitriev, Anton A. Yakimanskiy, Ilya E. Kolesnikov, Tatiana G. Chulkova, Alexander V. Yakimansky, Alexey R. Tameev

Issue&Volume: 2024-10-29

Abstract: Copolyfluorenes are of great interest due to their ability to form thin films with tunable optical and electrical properties. In this paper, copolymers of polyfluorene with electron withdrawing dicyanostilbene and dicyanophenanthrene moieties were synthesized; their thin films were characterized by electron spectroscopy, cyclic voltammetry, electrical, and photoelectrical measurements. The mobility of charge carriers in the copolymers was measured for the first time, with the acceptor components providing balanced electron and hole mobilities of the order of 106 cm2·V1·s1. Photodetectors based on the copolymer/PTCDI heterojunction exhibited the photoresponse band extended into the green region due to the absorption of PTCDI and an increased photocurrent in the UV-blue absorption band of the copolymer, which is related to the absorption of photoluminescent emission of the copolymers in PTCDI. The presented approach to improving the performance of a polymer-based photodetector is promising in organic optoelectronics.

DOI: 10.1007/s10118-024-3231-4

Source: https://www.cjps.org/en/article/doi/10.1007/s10118-024-3231-4/