Naphthodipyrrolidone (NDP) based conjugated polymers with high electron mobility and ambipolar transport properties
Journal
Polymer Chemistry
Journal Volume
8
Journal Issue
21
Pages
3255
Date Issued
2017-01-01
Author(s)
Zhang, Haichang
Zhang, Shuo
Mao, Yifan
Liu, Kewei
Chen, Yu Ming
Jiang, Zhang
Strzalka, Joseph
Yang, Wenjun
Zhu, Yu
Abstract
Two novel donor-acceptor π-conjugated polymers based on naphthodipyrrolidone (NDP) were synthesized and characterized. The polymers possess low band gaps and suitable molecular orbital levels as ambipolar semiconductors. The thin film organic field effect transistor of NDP polymers exhibited ambipolar transport properties with a high electron mobility up to 0.67 cm2 V-1 s-1. The grazing-incidence wide-angle X-ray scattering (GIWAXS) studies demonstrated that the polymer molecules pack into a long-range-ordered lamellar structure with isotropically oriented crystalline domains. Thermal annealing promoted edge-on lamellar stacking as evidenced by the increased diffraction intensity along the out-of-plane direction. The polymer with NDP and bithiophene units achieved the best edge-on lamellar stacking after thermal annealing, which yielded the best electron transport performance in this work.
SDGs
Type
journal article