Premium
Molecular Weight Engineering in High‐Performance Ambipolar Emissive Mesopolymers
Author(s) -
Guo Xiaofei,
Zhang Yihan,
Hu Yongxu,
Yang Jiaxin,
Li Yang,
Ni Zhenjie,
Dong Huanli,
Hu Wenping
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202105036
Subject(s) - ambipolar diffusion , photoluminescence , oled , polymer , materials science , optoelectronics , transistor , organic semiconductor , diode , conjugated system , molecular engineering , light emitting diode , polymerization , photochemistry , chemistry , nanotechnology , physics , plasma , layer (electronics) , quantum mechanics , voltage , composite material
Mesopolymers with high solubility, free of structural defects, and negligible batch‐to‐batch variation open a new avenue for organic optoelectronics. Organic light emitting transistors that combine the functions of organic light‐emitting diodes and organic field‐effect transistors. However, charge transport ability and light emitting strength are contradictory within one conjugated polymer. Herein, three low‐molecular‐weight mesopolymers with thienopyrroledione–benzothiadiazole repeating units (meso‐TBTF) were obtained. The mesopolymers show strong solid‐state emission and high ambipolar carrier mobility. The molecular weights of meso‐TBTF can be tuned by polymerization temperature. The mesopolymers have photoluminescence quantum yields (PLQY) of about 50 % in solution and 10 % in solid state. Polymer light emitting diodes of this material are fabricated to explore its potential use in optoelectronic devices.