Improved photoluminescence emission and gas sensor properties of ZnO thin films
Source abstract
Abstract
Abstract In this article, we report a comparative study of the influence of pressure-assisted (1.72 MPa) versus ambient pressure thermal annealing on both ZnO thin films treated at 330 °C for 32 h. The effects of pressure on the structural, morphological, optical, and gas sensor properties of these thin films were investigated. The results show that partial preferential orientation of the wurtzite-structure ZnO thin films in the [002] or [101] planes is induced based on the thermal annealing conditions used (i.e., pressure assisted or ambient pressure). UV–vis absorption measurements revealed a negligible variation in the optical -band gap values for the both ZnO thin films. Consequently, it is deduced that the ZnO thin films exhibit different distortions of the tetrahedral [ZnO4] clusters, corresponding to different concentrations of deep and shallow level defects in both samples. This difference induced a variation of the interface/bulk-surface, which might be responsible for the enhanced optical and gas sensor properties of the pressure-assisted thermally annealed film. Additionally, pressure-assisted thermal annealing of the ZnO films improved the H2 sensitivity by a factor of two.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: ZnO doping and properties · Gas Sensing Nanomaterials and Sensors · Ga2O3 and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (63)
Show source-provided references
1. Precursor-dependent blue-green photoluminescence emission of ZnO nanoparticles10.1021/jp208487v ↗
2. ZnO: material, physics and applications10.1002/cphc.200700002 ↗
3. Growth of a-plane ZnO thin films on LaAlO3(100) substrate by metal-organic chemical vapor deposition10.1016/j.jcrysgro.2007.11.073 ↗
4. Zinc blende versus wurtzite ZnS nanoparticles: control of the phase and optical properties by tetrabutylammonium hydroxide10.1039/C4CP02611J ↗
5. Facile deposition of ZnO:Cu films: structural and optical characterization10.1016/j.mssp.2014.11.004 ↗
6. Klingshirn · 2010
7. V. Kuncser, L. Miu, Size Effects in Nanostructures Basics and Applications, Springer Series in Materials Science, 2014, vol. 20510.1007/978-3-662-44479-5 ↗
8. An easy method of preparing ozone gas sensors based on ZnO nanorods10.1039/C5RA00581G ↗
9. Influence of film thickness on the properties of sprayed ZnO thin films for gas sensor applications10.1016/j.spmi.2014.03.029 ↗
10. Microstructure and gas-sensing properties of sol–gel ZnO thin films10.1016/j.tsf.2007.07.198 ↗
11. Hydrogen: an overview10.1021/cr050200z ↗
12. Coupling of wind energy and biogas with a high temperature steam electrolyser for hydrogen and methane production10.4236/gsc.2014.42010 ↗
13. Improved room-temperature hydrogen sensing performance of directly formed Pd/WO3 nanocomposite10.1016/j.snb.2013.11.057 ↗
14. Influence of annealing on the structural, optical and photoluminescence properties of ZnO thin films for enhanced H2 sensing application10.1016/j.ceramint.2012.11.061 ↗
15. Effect of reaction time and Sb doping ratios on the architecturing of ZnO nanomaterials for gas sensor applications10.1016/j.apsusc.2013.04.003 ↗
16. Influence of In doping on the structural, optical and acetone sensing properties of ZnO nanoparticulate thin films10.1016/j.mssp.2012.04.015 ↗
17. Nanocrystalline ZnO(Ga): paramagnetic centers, surface acidity and gas sensor properties10.1016/j.snb.2013.03.068 ↗
18. Performance of Cr-doped ZnO for acetone sensing10.1016/j.apsusc.2013.01.064 ↗
19. Mn-doped ZnO nanorod gas sensor for oxygen detection10.1016/j.cap.2012.12.029 ↗
20. Mechanism enhancing gas sensing and first-principle calculations of Al-doped ZnO nanostructures10.1039/c3ta11516j ↗
21. Influence of Sn doping on ZnO sensing properties for ethanol and acetone10.1016/j.msec.2012.01.032 ↗
22. Improving the ethanol sensing of ZnO nano-particle thin films—the correlation between the grain size and the sensing mechanism10.1016/j.snb.2010.09.045 ↗
23. Fabrication and characterization of ZnO thin film for hydrogen gas sensing prepared by RF-magnetron sputtering10.1016/j.measurement.2013.01.004 ↗
24. Study on photoelectric gas-sensing property and photogenerated carrier behavior of Ag–ZnO at the room temperature10.1016/j.snb.2013.05.088 ↗
25. Ahn · Chem. Phys. Lett. · 2011 · 511 · 33110.1016/j.cplett.2011.06.045 ↗
26. Correlation between structural and electronic order–disorder effects and optical properties in ZnO nanocrystals10.1039/C4TC01248H ↗
27. Fundamentals of zinc oxide as a semiconductor10.1088/0034-4885/72/12/126501 ↗
28. EPR and photoluminescence spectroscopy studies on the defect structure of ZnO nanocrystals10.1103/PhysRevB.86.014113 ↗
29. Sonicated sol–gel preparation of nanoparticulate ZnO thin films with various deposition speeds: the highly preferred c-axis (002) orientation enhances the final properties10.1016/j.jallcom.2013.07.202 ↗
30. Raman study of insulating and conductive ZnO:(Al, Mn) thin films10.1002/pssa.201532162 ↗
31. Laser molecular beam epitaxy of ZnO thin films and heterostructures10.1088/0022-3727/47/3/034002 ↗
32. Hetero-epitaxial growth of ZnO film by temperature-modulated metalorganic chemical vapor depositionv10.1143/APEX.2.045502 ↗
33. Influence of post-deposition annealing on the structural and optical properties of ZnO thin films prepared by sol-gel and spin-coating method10.1016/j.spmi.2007.07.032 ↗
34. Effect of temperature on glass-ceramic films prepared by impregnation of commercial float glass surfaces with oxide powders under pressure10.1016/j.tsf.2010.05.087 ↗
35. Microstructure of ceramic particles infiltrated into float glass surfaces by high gas pressure impregnation10.1016/j.jallcom.2009.05.061 ↗
36. Nanomechanical properties of glass–ceramic films obtained by pressure impregnation of oxide powders on commercial float glass surfaces10.1016/j.jnoncrysol.2009.11.006 ↗
37. IR reflectance characterization of glass–ceramic films obtained by high pressure impregnation of SnO2 nanopowders on float glass10.1016/j.ceramint.2011.01.013 ↗
38. Red shift and higher photoluminescence emission of CCTO thin films undergoing pressure treatment10.1016/j.jallcom.2013.08.210 ↗
39. Effect of pressure-assisted thermal annealing on the optical properties of ZnO thin films10.1002/bio.2463 ↗
40. Yttrium sesquioxide, Y O, thin films deposited on Si by ion beam sputtering: microstructure and dielectric properties10.1016/S0040-6090(01)01468-7 ↗
41. Crystal defects and related stress in Y2O3 thin films: origin, modeling, and consequence on the stability of the C-type structure10.1103/PhysRevB.84.014104 ↗
42. A. Guinier, X-rays diffraction in crystals, imperfect crystals, and amorphous bodies, W.H. Freeman, San Francisco, USA, 1963.
43. “ Effect of sintering pressure on structure and magnetic properties of Zn0.99Ni0.01O bulk samples synthesized under different pressures10.1016/j.jmmm.2014.08.026 ↗
44. Structural and optical characteristics of spin-coated ZnO thin films10.1016/j.apsusc.2009.10.075 ↗
45. Effect of annealing on the structural, morphological and photoluminescence properties of ZnO thin films prepared by spin coating10.1016/j.jcis.2014.04.035 ↗
46. Structural, optical and visible light photocatalytic properties of nanocrystalline Nd doped ZnO thin films prepared by spin coating method10.1016/j.ceramint.2014.12.098 ↗
47. Heat-activated structural evolution of sol-gel-derived ZnO thin films10.1016/j.jcrysgro.2007.11.074 ↗
48. Effect of annealing on ZnO thin films grown on (001) silicon substrate by low-pressure metalorganic chemical vapour deposition10.1088/0268-1242/19/6/017 ↗
49. R.M. German, Fundam. Sinter. SCHNEIDER, S.J. Eng. Mater. Handb. Ceram. Glas., 1991, vol. 4
50. Gas sensitive ZnO thin films with desired (002) or (100) orientation obtained by ultrasonic spray pyrolysis10.1016/j.matchemphys.2014.08.039 ↗
51. A DFT study of structural and electronic properties of ZnS polymorphs and its pressure induced phase transitions10.1111/jace.13191 ↗
52. Raman scattering investigations on Co-doped ZnO epitaxial films: local vibration modes and defect associated ferromagnetism10.1016/j.cap.2014.03.011 ↗
53. Large-sized-mismatched group-V element doped ZnO films fabricated on silicon substrates by pulsed laser deposition10.1016/j.vacuum.2010.02.010 ↗
54. Electrical properties and Raman scattering investigation of Ag doped ZnO thin films10.1016/j.ssc.2011.10.006 ↗
55. Optical and structural properties of ZnO and ZnO:Cd particles grown by the hydrothermal method10.1111/jace.13460 ↗
56. Zn- and O-polar surface effects on Raman mode activation in homoepitaxial ZnO thin films10.1016/j.ssc.2012.01.040 ↗
57. A relationship between structural and electronic order–disorder effects and optical properties in crystalline TiO2 nanomaterials10.1039/C4DT03254C ↗
58. Structural, optical, and magnetic properties of NiMoO4 nanorods prepared by microwave sintering10.1155/2015/315084 ↗
59. Kroger · 1956 · 30710.1016/S0081-1947(08)60135-6 ↗
60. Single-crystal zinc oxide nanorods with nanovoids as highly sensitive NO2 nanosensors10.1016/j.matlet.2012.12.006 ↗
61. Tunable gas sensing properties of p- and n-doped ZnO thin films10.1016/j.snb.2010.05.025 ↗
62. Hydrogen gas sensors based on semiconductor oxide nanostructures10.3390/s120505517 ↗
63. Highly sensitive and selective H2 sensing by ZnO nanofibers and theunderlying sensing mechanism10.1016/j.jhazmat.2014.12.007 ↗