Defect states and kinetic parameter analysis of ZnAl2O4 nanocrystals by X-ray photoelectron spectroscopy and thermoluminescence

被引：62

作者：

Jain, Megha ^{[1
,2
]}

Manju ^{[1
,2
]}

Kumar, Ravi ^{[3
]}

Won, Sung Ok ^{[4
]}

Chae, Keun Hwa ^{[4
]}

Vij, Ankush ^{[5
]}

Thakur, Anup ^{[1
]}

机构：

[1] Punjabi Univ, Dept Basic & Appl Sci, Adv Mat Res Lab, Patiala 147002, Punjab, India

[2] Punjabi Univ, Dept Phys, Patiala 147002, Punjab, India

[3] Natl Inst Technol, Ctr Mat Sci & Engn, Hamirpur 177005, India

[4] Korea Inst Sci & Technol, Adv Anal Ctr, Seoul 02792, South Korea

[5] Amity Univ Haryana, Dept Phys, Nanophosphors Lab, Gurgaon 122413, South Korea

来源：

SCIENTIFIC REPORTS | 2020年 / 10卷 / 01期

关键词：

ZINC ALUMINATE; OPTICAL-PROPERTIES; GREEN SYNTHESIS; PHOTOLUMINESCENCE; DECONVOLUTION; TEMPERATURE;

D O I：

10.1038/s41598-019-57227-8

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Defect states in ZnAl2O4 have a significant role in its applicability as a luminescent material. To understand the nature and distribution of defects in its crystal lattice, thermoluminescence (TL) study has been carried out. Excellent TL response is observed from gamma- and ultraviolet-irradiated samples at different doses and exposure durations, respectively. Different type of fuels employed in combustion synthesis show a remarkable effect on the trap distribution and hence luminescence properties. Shallow and deep traps are observed in crystals attributed to O- vacancies and F+ centers. The mechanism of trapping, retrapping and recombination have been depicted through schematic band model diagram. X-ray photoelectron spectroscopy indicated the presence of various types of defects specifically Al-Zn antisite defect, oxygen and zinc vacancies which are further upheld by photoluminescence and Raman spectroscopy. All results when summed up, predict ZnAl2O4 to be a quality material for dosimetry.

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页数：14

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