KaniAmuthana, B., Vinotha, S., Vaithinathan, K. , Roy, V. A.L. and Thilakan, P. (2019) Influence of nitrogen dopant source on the structural, photoluminescence and electrical properties of ZnO thin films deposited by pulsed spray pyrolysis. Ceramics International, 45(18A), pp. 24324-24330. (doi: 10.1016/j.ceramint.2019.08.147)
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Abstract
The N-doped ZnO thin films have been deposited using pulsed spray pyrolysis from Zinc Acetate (ZA) precursor along with the N dopants of N2 carrier gas (N2 – series) and Ammonium Acetate (AA – series) on glass substrates at the optimized substrate temperature of 300 °C with different spraying pulse intervals. The X-ray powder diffraction studies confirmed the polycrystalline structures with the presence of mixed compressive and tensile strain along ‘a’ and ‘c-axes’ respectively for the N2 doped films and the presence of compressive strain alone along both ‘a’ and ‘c-axes’ for the AA doped films. The XPS analysis revealed that the N2 gas source led to the incorporation of elemental N into the film and the AA source led to the incorporation of both elemental and molecular N into the film. The Micro Raman Analysis confirmed the N-doping and its contributed carrier localization by exhibiting A1(LO) and A1(TO) modes. Photoluminescence studies exhibited the active band gap of ~3.19 eV with additional peaks related to hole traps at ~3 eV and electron traps at ~2.8 eV without exhibiting peaks correspond to oxygen vacancy defects. The Seebeck measurements confirmed the establishment of intrinsic p-type conductivity in both the cases at room temperature (RT) and the films deposited with pure elemental doping from N2 source found exhibiting better p-type conductivity than those films deposited using AA source.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Vellaisamy, Professor Roy and Karthikeyan, Dr Vaithinathan |
| Authors: | KaniAmuthana, B., Vinotha, S., Vaithinathan, K., Roy, V. A.L., and Thilakan, P. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | Ceramics International |
| Publisher: | Elsevier |
| ISSN: | 0272-8842 |
| ISSN (Online): | 1873-3956 |
| Published Online: | 16 August 2019 |
| Related URLs: |
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