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Effect of annealing temperature and -irradiation on the electrical conductivity of stacked naphthalocyanine (SnNc - VoNc) thin films

NISHA S. PANICKER1, JOSMI JOHN2, I. REJEENA3, C. S. MENON4, R. L. THOMAS5, VINOY THOMAS2,*

Affiliation

  1. Department of Physics, KSM DB College, Sasthamcotta-690521, University of Kerala, India
  2. Center for Functional Materials, Department of Physics, Christian College Chengannur-689122, University of Kerala, India
  3. Department of Physics, MSM College Kayamkulam-686560, India
  4. School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam -686560, India
  5. Department of Physics, St. Joseph’s College for Women, Alappuzha-688001, University of Kerala, India

Abstract

Composite thin films of Tin (II) 2,3-naphthalocyanine (SnNc) and Vanadyl 2,3-naphthalocyanine (VoNc) were prepared by the novel stacked vacuum deposition techniques. In order to study the effect of defect induced conductivity of these films, the prepared films are subjected to heat treatment and γ-ray irradiation. Surface morphological features are investigated using Scanning electron microscopy (SEM) and observed that this technique yields continuous films without any segregation. UV-Vis-NIR spectrum shows a characteristics of broad Q-band spectrum for composite thin films. The electrical conductivity studies of stacked films for various heat treatment stages and γ-ray irradiation shows better conductivity compared to other naphthalocyanine counterpart and the activation energy is found to increase with annealing temperature..

Keywords

Organic semi-conductors, Naphthalocyanines, Electrical conductivity, Annealing, Gamma irradiation.

Submitted at: Feb. 6, 2024
Accepted at: Dec. 2, 2024

Citation

NISHA S. PANICKER, JOSMI JOHN, I. REJEENA, C. S. MENON, R. L. THOMAS, VINOY THOMAS, Effect of annealing temperature and -irradiation on the electrical conductivity of stacked naphthalocyanine (SnNc - VoNc) thin films, Journal of Optoelectronics and Advanced Materials Vol. 26, Iss. 11-12, pp. 523-528 (2024)