Origin of polychromatic emission and defect distribution within annealed ZnO nanoparticles
Source abstract
Abstract
Abstract Defects distribution in ZnO nano-particles is introduced by high temperature annealing in air and corresponding visible emission are comprehensively analyzed. Grain size initially increases with increasing annealing temperature until 800 °C and decreases after that. Higher temperature annealing alters defect distribution and initiates formation of O Zn (Zinc at oxygen site). Formation of O Zn , and presence of conventional defects is confirmed by Electron Paramagnetic Resonance spectra. Spatial distribution of polychromatic emission centers in annealed sample is estimated by diffusion mediated growth and confirmed by florescence imaging. Blue emission centre is found to be located on surface of particle/grain which gets modified by surface capping using PEG and PVA. These visible emissions exhibit strong excitation dependence, and can be excited below the bad gap energy. Based on XRD, EPR, emission by low energy excitation, and florescence imaging schematic of defect distribution within particle/grain and their corresponding emission is proposed.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: ZnO doping and properties · Quantum Dots Synthesis And Properties · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (52)
Show source-provided references
1. Recent advances in ZnO materials and devices10.1016/S0921-5107(00)00604-8 ↗
2. Optically pumped lasing of ZnO at room temperature10.1063/1.118824 ↗
3. Room temperature p-n ZnO blue-violet light-emitting diodes10.1063/1.2435699 ↗
4. Zener model description of ferromagnetism in zinc-blende magnetic semiconductors10.1126/science.287.5455.1019 ↗
5. Repeated temperature modulation epitaxy for p-type doping and light-emitting diode based on ZnO10.1038/nmat1284 ↗
6. Electronic properties of vapor-grown heteroepitaxial ZnO film on sapphire10.1143/JJAP.22.794 ↗
7. Hydrothermal growth of ZnO single crystals and their optical characterization10.1016/S0022-0248(00)00065-8 ↗
8. Influence of thermal annealing on optical and electrical properties of ZnO films prepared by electron beam evaporation10.1088/0268-1242/18/6/322 ↗
9. Random laser action in semiconductor powder10.1103/PhysRevLett.82.2278 ↗
10. Ultraviolet lasing in resonators formed by scattering in semiconductor polycrystalline films10.1063/1.122853 ↗
11. Formation and photocatalytic application of ZnO nanotubes using aqueous solution10.1021/la902866a ↗
12. A comprehensive review of ZnO materials and devices10.1063/1.1992666 ↗
13. ZnO–nanostructures, defects, and devices10.1016/S1369-7021(07)70078-0 ↗
14. Correlation between photoluminescence and oxygen vacancies in ZnO phosphors10.1063/1.116699 ↗
15. Intrinsic n-type versus p-type doping asymmetry and the defect physics of ZnO10.1103/PhysRevB.63.075205 ↗
16. Fabrication of green and orange photoluminescent, undoped ZnO films using spray pyrolysis10.1063/1.368295 ↗
17. First-principles study of native point defects in ZnO10.1103/PhysRevB.61.15019 ↗
18. Production of native donors in ZnO by annealing at high temperature in Zn vapor10.1063/1.2117630 ↗
19. Binks · 1999
20. Green luminescent center in undoped zinc oxide films deposited on silicon substrates10.1063/1.1394173 ↗
21. F.A. Kroger, The chemistry of imperfect crystals, 2nd edition, North Holland Amsterdam 1974.
22. Bylander · J. Appl. Phys. · 1978 · 49 · 118810.1063/1.325059 ↗
23. Correlations among size, defects, and photoluminescence in ZnO nanoparticles10.1063/1.2424538 ↗
24. Singla · J. Lumin. · 2009 · 29 · 43410.1016/j.jlumin.2008.11.021 ↗
25. Influence of surface modification on the luminescence of colloidal ZnO nanocrystals10.1021/jp0535285 ↗
26. Comparison of X-ray analysis methods used to determine the grain size and strain in nanocrystalline materials10.1080/01418619908210391 ↗
27. Influence of post-annealing treatment on the structure properties of ZnO film10.1016/j.apsusc.2004.07.056 ↗
28. Oxygen diffusion in single-crystal zinc oxide10.1111/j.1151-2916.1998.tb02421.x ↗
29. Tomilns · J. Appl. Phys. · 2000 · 87 · 11710.1063/1.371832 ↗
30. Rodolfo Gunneweik · Ceram. Int. · 2014 · 40 · 1066710.1016/j.ceramint.2014.03.051 ↗
31. Native point defects in ZnO10.1103/PhysRevB.76.165202 ↗
32. Materials science
33. Role of copper in the green luminescence from ZnO crystals10.1063/1.1494125 ↗
34. Hydrogen: a relevant shallow donor in zinc oxide10.1103/PhysRevLett.88.045504 ↗
35. Electronic paramagnetic resonance investigation of the evolution of defects in zinc oxide during tribophysical activation10.1023/A:1018689721667 ↗
36. Zinc oxide nanoparticles with defects10.1002/adfm.200500087 ↗
37. Oxygen vacancies in ZnO10.1063/1.2053360 ↗
38. Mechanisms behind green photoluminescence in ZnO phosphor powders10.1063/1.116699 ↗
39. Vanheusden · J. Appl. Phys. · 1996 · 79 · 798310.1063/1.362349 ↗
40. Optically detected magnetic resonance and optically detected ENDOR of shallow indium donors in ZnO10.1103/PhysRevB.25.6049 ↗
41. Band tails in semiconductors10.1016/0038-1101(85)90203-5 ↗
42. Strain associated band tailing effects in semiconductors10.1002/pssb.2220730116 ↗
43. Defect-induced optical absorption in the visible range in ZnO nanowires10.1103/PhysRevB.80.195314 ↗
44. Size-dependent surface luminescence in ZnO nanowires10.1103/PhysRevB.69.245401 ↗
45. The electronic structure and spectral properties of ZnO and its defects: nuclear Instruments and methods
46. Effect of annealing on the ac leakage components of the ZnO varistor. I. Resistive current10.1063/1.346766 ↗
47. Annealing effect on the property of ultraviolet and green emissions of ZnO thin films10.1063/1.1633343 ↗
48. Characterization of intrinsic and impurity deep levels in ZnSe and ZnO crystals by nonlinear spectroscopy10.1016/0022-0248(94)90933-4 ↗
49. Blue luminescence of ZnO nanoparticles based on non‐equilibrium processes: defect origins and emission controls10.1002/adfm.200901884 ↗
50. Sintering reactions of zinc oxide10.1063/1.1735046 ↗
51. Diffusion of zinc vacancies and interstitials in zinc oxide10.1063/1.2206559 ↗
52. First-principles study of migration mechanisms and diffusion of oxygen in zinc oxide10.1103/PhysRevB.73.115207 ↗