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

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Chinese Journal of Polymer Science Pub Date : 2024-10-29 DOI:10.1007/s10118-024-3231-4

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

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引用次数: 0

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 10⁻⁶ cm²·V⁻¹·s⁻¹. 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.

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荧光发射重吸收增强聚芴共聚物/PTCDI异质结中的光电流

共聚芴由于能够形成具有可调光学和电学性能的薄膜而引起了极大的兴趣。本文合成了聚芴与吸电子二氰二苯乙烯和二氰菲的共聚物；通过电子能谱、循环伏安法、电学和光电测量对其薄膜进行了表征。首次测量了共聚物中载流子的迁移率，受体组分提供了10−6 cm2·V−1·s−1数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，光响应带扩展到绿色区域，并且共聚物的紫外-蓝色吸收带光电流增加，这与共聚物在PTCDI中吸收光致发光发射有关。本文提出的改进聚合物光电探测器性能的方法在有机光电子学领域具有广阔的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chinese Journal of Polymer Science 化学-高分子科学

CiteScore

7.10

自引率

11.60%

发文量

218

审稿时长

6.0 months

期刊介绍： Chinese Journal of Polymer Science (CJPS) is a monthly journal published in English and sponsored by the Chinese Chemical Society and the Institute of Chemistry, Chinese Academy of Sciences. CJPS is edited by a distinguished Editorial Board headed by Professor Qi-Feng Zhou and supported by an International Advisory Board in which many famous active polymer scientists all over the world are included. The journal was first published in 1983 under the title Polymer Communications and has the current name since 1985. CJPS is a peer-reviewed journal dedicated to the timely publication of original research ideas and results in the field of polymer science. The issues may carry regular papers, rapid communications and notes as well as feature articles. As a leading polymer journal in China published in English, CJPS reflects the new achievements obtained in various laboratories of China, CJPS also includes papers submitted by scientists of different countries and regions outside of China, reflecting the international nature of the journal.