Affiliation:
1. Department of Humanities and Sciences G. Pullaiah College of Engineering and Technology Kurnool Andhra Pradesh 518452 India
2. Department of Physics Rajeev Gandhi Memorial College of Engineering and Technology Nandyal Andhra Pradesh 518501 India
Abstract
A series of Gd1–xEuxAl3(BO3)4 red light‐emitting phosphors, where 0 ≤ x ≤ 15.0%, are prepared by high‐temperature solid‐phase method and characterized through X‐ray diffraction, Fourier‐transform infrared spectroscopy, scanning electron microscopy, photoluminescence emission and excitation, luminescence decay, and thermoluminescence studies. Under 274 and 396 nm UV excitations, intense red luminescence is observed through 5D0 → 7F0,1,2,3,4 transitions. Based on concentration‐dependent luminescence spectra, the Eu3+ concentration is optimized to be 12.0% for efficient red luminescence. The Commission International de I’Eclairage coordinates and hence the color purity and correlated color temperature values are obtained from the emission spectra. The thermal stability is examined using the temperature‐dependent luminescence study. The high amount of color purity and thermal stability of Eu0.12Gd0.88Al3(BO3)4 phosphor shows its suitability as the best replacement for red component in phosphor‐converted white light‐emitting diodes (LEDs) as well as indoor plant growth LEDs.
Funder
Delhi Technological University