Abstract
This study analyzes the impact of zinc oxide (ZnO) decoration on the structure, stability and electronic properties of the alkyl-substituted thiophene-vinyl carbazole (3-MeTH-VCZ) copolymer, employing density functional theory (DFT)-based quantum atomistix toolkit (ATK) software. This analysis shows a negative interaction energy between the ZnO and the pristine 3-MeTH-VCZ, facilitating substantial charge transfer. Furthermore, the composite (3-MeTH-VCZ-ZnO) formed by the decoration of ZnO in the pristine 3-MeTH-VCZ shows improved electronic properties compared to its pristine counterpart. This improvement is evidenced by an approximate 62% reduction in the highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) gap, confirmed by shifts observed in the molecular energy spectrum (MES) and density of state (DOS) profiles. The reduction in the HOMO-LUMO gap suggests enhanced physicochemical and electrochemical sensitivity of the synthesized composites to external stimuli, making them promising candidates for sensing and optoelectronic devices.
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