Effect of charge transfer band on luminescence properties of Yb doped Y2O3 nanoparticles

Pratik Deshmukh, S. Satapathy*, Anju Ahlawat, Khemchand Sahoo, P. K. Gupta

Nano Functional Materials Laboratory, Laser Materials Development & Devices Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, India

Adv. Mater. Lett., 2017, 8 (4), pp 458-464

DOI: 10.5185/amlett.2017.6560

Publication Date (Web): Mar 14, 2017

E-mail: srinu73@cat.ernet.in, srinusatapathy@gmail.com

Abstract


The photoluminescence properties of Yb doped Y2O3 nanoparticles were investigated in visible region to resolve the origin of dissimilar fluorescence peaks at different excited wavelengths and to explore possible use of Yb: Y2O3 for white light emission, excited by available near UV LED. The peak observed at 370 nm in photoluminescence excitation spectrum is due to expected transition of electrons from 2F7/2 to charge transfer band (CTB) associated with non-centrosymmetric C2 centers however, the excitation peak at 335 nm is due to transition of electrons from 2F7/2 to the CTB associated with distorted centrosymmetric C3i centers. The Yb doping in nano Y2O3 not only modify the CTB but also helps in transition of electron from these CTBs to ground 2F5/2 and 2F7/2 levels of Yb. Strong broad emission peak is observed at 503 nm which is assigned to transition from distorted CTB (C3i) to 2F5/2 energy levels. The findings are important because broad emission (from ~400 to ~650 nm) at 335 nm excitation (available AlGaN LED wavelength) due to C2 and C3i centers in Yb: Y2O3 may be used for white light emission applications.

Keywords

Photoluminescence, nanophosphor, Yb: Y2O3, charge transfer band, TEM.

Previous issues

Celebrating 10th Years of Diamond Open Access Publishing in Advanced Materials  

Cerebral Oxygenation Studies Through Near Infrared Spectroscopy: A Review

Analysis of Fine Sulfoaluminate Cement by Strength and Thermogravimetric Analysis

Characterization of the Interfacial Surface Energy for Composite Electrical Conduction Measurements using Two Full Range Percolation Threshold Models

Quantitative Detect of Fatigue of Membrane of Erythrocyte in Uniform Shear Field

Ecofriendly-developed Polyacrylic Acid-coated Magnetic Nanoparticles as Catalysts in Photo-fenton Processes

Evaluation of Drug Interactions with Medications Prescribed to Ambulatory Patients with Metabolic Syndrome in Urban Area

Fiber-reinforced Cementitious Composite: Sensitivity Analysis and Parameter Identification 

Evaluation of Drug Utilization Patterns Based on World Health Organization Drug use Indicators at Outpatients Clinics

Are Quantitatively Micro-machined Scaffolds Effective for Cell Technology?

Synthesis and Characterization of Gold Nanoparticles from Lobelia Nicotianifolia Leaf Extract and its Biological Activities

Advanced Oxidations of Tartrazine Azo-dye

Antifungal Activity of Salvia jordanii Against the Oral Thrush Caused by the Cosmopolitan Yeast Candida albicans among Elderly Diabetic Type 2 patients

Upcoming Congress

Knowledge Experience at Sea TM