Optimizing the Emission Oscillator Strength Based on the Molecular Length Manipulation Strategy

Abstract

The thiophene/phenylene co-oligomers (TPCOs) is characterised by the molecular layered structure,this structure being very often observed for crystals of ‘‘direction-defined’’ long molecules with a large aspect ratio .The electronic, electric, thermoelectric and spectral properties for a series of molecule with different molecular length (P3T,P5T,P7T,P9T,P11T)are studied to explore the fundamental transport mechanisms for electrons crossing through single molecules.we probed emission streangth osillator ,electrical conductance and Seebeck coefficient i-V characterastic for Au| organic molecule|Au configurations using the density functional theory Our results confirmed that increasing the molecular length leads to improved optical, electronic and thermoelectric properties, and thus the possibility of using these particles as effective laser media.