Abstract
Versatile luminescence has always been the source of inspiration to explore the complex trap distribution in semiconducting oxides. In the continuation of reported investigation of effect of fuel type on the trap distribution and other properties of zinc aluminate (Jain et al., Sci. Rep. 10 (2020) 385), effect of fuel blends on defect structure is examined. A gradual transition from narrow to broad glow curves is observed on substituting urea fuel by monoethanolamine (MEA) during synthesis. In addition, type of irradiation (γ and UV radiation) is having a different impact on populating the traps and hence recombination kinetics. Deeper traps started contributing more with the increase in MEA fuel. Deconvolution of complex curves has enabled to visualize the presence of multiple traps with overlapping wavefunctions. Zn/Al vacancies act as hole trap centres and AlZn• antisite defect as an electron trap aided by neutral and charged oxygen vacancies (F and F+ centres) situated somewhat deeper in the forbidden gap. In order to provide a lucid understanding, phenomenon of trapping, de-trapping, re-trapping and recombination is depicted through a band model diagram. Presented study can be useful in tuning various properties of ZnAl2O4.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
