Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (2): 20220313.doi: 10.7503/cjcu20220313

• Physical Chemistry • Previous Articles     Next Articles

Theoretical Study on the Strain Energy and Reorganization Energy Based on Planar Grid Benzothiophene

PENG Xinzhe1, GE Jiaoyang1, WANG Fangli1, YU Guojing1, RAN Xueqin2(), ZHOU Dong3, YANG Lei1(), XIE Linghai1()   

  1. 1.State Key Laboratory for Organic Electronics and Information Displays,School of Materials Science and Engineering,Nanjing University of Posts & Telecommunications,Nanjing 210023,China
    2.School of Flexible Electronics(Future Technologies),Nanjing Tech University,Nanjing 211816,China
    3.College of Computer,Nanjing University of Posts and Telecommunications,Nanjing 210023,China
  • Received:2022-05-08 Online:2023-02-10 Published:2022-09-06
  • Contact: RAN Xueqin, YANG Lei, XIE Linghai E-mail:iamxqran@njtech.edu.cn;iamlyang@njupt.edu.cn;iamlhxie@njupt.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21503114);the Nanjing University of Posts and Telecommunications Scientific Foundation, China(NY215056)

Abstract:

Organic semiconductor materials are widely used in organic light-emitting diodes(OLEDs), organic field-effect transistors(OFETs), and organic solar cells(OSCs), but they still have some defects, such as poor mobility, which are not conducive to electron transport. In this paper, a series of novel organic charge-transporting nanomolecules were designed and studied based on benzothiophene. Then the molecular structure and electronic properties were studied by using density functional theory, such as molecular orbitals, electrostatic potential, ionization potential, electron affinity, and reorganization energy. Furthermore, intramolecular weak interactions and the contribution of each vibrational mode to the reorganization energy were estimated using non-covalent interaction(NCI) analysis and normal mode analysis, respectively. The results showed that the reorganization energy decreased with the increase of benzothiophene and gridization effect. Compared with the monomer, the electron and hole reorganization energies were reduced by at least 0.394, and 0.056 eV, respectively, which proves that gridization effect is an effective way to reduce the reorganization energy.

Key words: Benzothiophene, Density functional theory, Non covalent interaction, Reorganization energy, Charge transfer

CLC Number: 

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