Charge transport and optoelectronic properties in polycyclic Hetero[8]circulenes: A computational study

Abstract

Heterocirculenes have emerged as promising candidates for novel materials due to their unique molecular structures and intriguing electronic properties. This work's main objective is to assess hetero[8]circulenes' charge transport and optoelectronic characteristics. The comprehensive analyses of all the hetero[8]circulenes are executed by using Density functional theory (DFT) and Time-Dependent Density functional theory (TD-DFT). Molecular Orbitals Pictures (MOPs) i.e. Lowest unoccupied molecular orbital (LUMO) and Highest occupied molecular orbital (HOMO), Electron affinities (EA), Hole Extraction Potential (HEP), Ionization potential (IP), Electron Extraction Potential (EEP), NICS (0), Density of states (DOS), Molecular Electrostatic Potential maps (MEP), and Reorganization energies (Z), of all the studied molecules were examined. The hole and electron transfer integrals, and rate constant for all the molecule are also investigated. The Thiophene and Selenophene containing heterocirculenes show the best charge transport properties, and also, HS3 shows the lowest Z_H of 36 meV. The difference between hole and electron Z is less than 50 meV, so these are also appropriate as ambipolar materials. The findings of the study indicate the potential utility of Heterocirculenes as organic materials for optoelectronic applications.