A study on the spectroscopic, energy band, and optoelectronic properties of alpha,omega-dihexylsexithiophene/tris(8-hydroxyquinolinate) gallium blends; DH6T/Gaq3 composite system

作者：Muhammad Fahmi F; Yahya Mohd Yazid^*; Ketuly Kamal Aziz; Muhammad Abdulkader Jaleel; Sulaiman Khaulah

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2016, 169: 144-151.

DOI：10.1016/j.saa.2016.06.031

• DH6T/Gaq3
• Composites
• Spectroscopy
• Energy band
• Optoelectronics

In this work the optical response, spectroscopic behaviour, and optoelectronic properties of solution and solid state composite systems based on alpha,omega-dihexylsexithiophene/tris(8-hydroxyquinolinate) gallium (DH6T/Gaq3) are studied upon the incorporation of different molar percentages of Gaq3. UV-vis, PL, FTIR spectrophotometers and SEM technique were utilized to perform the investigations. The results showed a reduced energy band (E-g) (from 233 eV to 1.83 eV) and a broadened absorption spectrum for the blend system when 29.8% molar of Gaq3 was incorporated. These were attributed to the enhanced intermolecular interactions that are brought about by the increased strength of pi-pi overlap between the molecular moieties. A mathematical formula was developed to interpret the non-monotonic change occurred in E-g, while numerical calculations have been made to assign the type and nature of the electronic transitions governing the spectroscopic behaviour of the system. The results were elaborated and comprehensively discussed in terms of the exciton generation, energy band theory, molecular interactions, and spatial geometry.

• 出版日期2016-12-5