Temperature effects on the dynamics of oppositely charged bipolarons scattering in conjugated polymers

J. J. Liu, Y. Meng, Y. P. Luo, Y. L. Zhang () and B. Di ()
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J. J. Liu: Institute for Nationalities Attached to Hebei Normal University
Y. Meng: Xingtai University
Y. P. Luo: Hebei Normal University
Y. L. Zhang: Hebei University of Science and Technology
B. Di: Hebei Normal University

The European Physical Journal B: Condensed Matter and Complex Systems, 2023, vol. 96, issue 10, 1-7

Abstract: Abstract Within a tight-binding electron–phonon interaction model modified to include temperature effects, the dynamics of two oppositely charged bipolarons scattering in conjugated polymers are investigated using a nonadiabatic evolution method. In this paper, the temperature effects are introduced by the Langevin equation of motion. In order to further understand the photoelectric conversion mechanism in organic light emitting devices, the yields of the luminescent products are studied. It is found that temperature should promote the formation of luminescent element excitations under relatively weak and strong electric fields. In addition, temperature effects can affect the time of bipolarons recombination. With the increase in temperature, the time of bipolarons recombination increases. The results can provide some research ideas for designing organic light-emitting devices with high electroluminescence efficiency. Graphical abstract

Date: 2023
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DOI: 10.1140/epjb/s10051-023-00604-0

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