Using Recycled Tetrapak and Doped Titanyl/Vanadyl Phthalocyanine to Make Solid-State Devices

Area of Science:

• Materials Science
• Organic Electronics
• Computational Chemistry

Background:

• Phthalocyanines are promising organic semiconductors.
• Investigating metal-centered phthalocyanines (TiOPc, VOPc) for electronic applications.
• Doping with anthraflavic acid and deposition on flexible electrodes are explored.

Purpose of the Study:

• To investigate the semiconductor behavior of metal-doped phthalocyanines.
• To understand the influence of metal type (Ti vs. V) on molecular and electronic properties.
• To fabricate and characterize solid-state devices based on these materials.

Main Methods:

• Density Functional Theory (DFT) for molecular structure and electronic behavior analysis.
• Experimental characterization of film morphology (RMS roughness) and mechanical properties (maximum stress).
• Fabrication and electrical testing (current-voltage characteristics) of solid-state devices.

Main Results:

• DFT revealed metal-dependent structural and electronic changes in TiOPc and VOPc.
• VOPc-Anthraflavine films exhibited higher maximum stress (8.58 MPa).
• TiOPc-Anthraflavine films showed smaller band gaps (1.81 eV indirect, 1.98 eV direct).
• Devices displayed current saturation; TiOPc-Anthraflavine devices exhibited diode behavior with a threshold voltage of 0.6–0.8 V.

Conclusions:

• The metal center in phthalocyanines critically influences their semiconductor properties.
• Doped phthalocyanine films on flexible electrodes show potential for electronic device applications.
• The specific device characteristics depend on the metal and substrate used.