Excitation power and Er3+ concentration effect on the color quality parameters in Y2O3:Er3+/Yb3+/Tm3+ nanophosphors

Sevcan Tabanli; Gonul Eryurek

doi:10.1117/1.JNP.12.026008

26 April 2018 Excitation power and Er3+ concentration effect on the color quality parameters in Y2O3:Er3+/Yb3+/Tm3+ nanophosphors

Sevcan Tabanli, Gonul Eryurek

Author Affiliations +

Journal of Nanophotonics, Vol. 12, Issue 2, 026008 (April 2018). https://doi.org/10.1117/1.JNP.12.026008

Abstract

Y₂O₃ nanocrystalline phosphors doped with Er^3 + / Yb^3 + / Tm^3 + ions were prepared using thermal decomposition technique at 500°C. Pure cubic phase of Y₂O₃ with an average crystallite size ∼29 ± 4 nm was determined from x-ray diffraction and high-resolution transmission electron microscope measurements. Their upconversion luminescence spectra were measured under 975-nm laser diode excitation at room temperature. A bright blue emission was simultaneously observed at 480 nm due to the G₄1 → H₆3 transition of Tm^3 + ions, with the green (550 nm) and red (670 nm) emissions due to the H_11/22, S_3/24 → I_15/24 and F_9/24 → I_15/24 transitions of Er^3 + ions, respectively. Relative emission intensities of these colors were significantly affected by the Er^3 + concentration as well as the excitation power density of 975-nm laser light. Color quality parameters and the color tuning abilities were determined from the Commission International de I’Echairage 1931 chromaticity diagram analysis, color rendering index, and their correlated color temperature values. A careful color tuning from cool to warm white light in Y₂O₃ : Er^3 + / Yb^3 + / Tm^3 + phosphors was achieved by controlling both the doping concentration of Er^3 + ions and the excitation power density of the 975-nm laser light.

Citation Download Citation

Sevcan Tabanli and Gonul Eryurek "Excitation power and Er3+ concentration effect on the color quality parameters in Y2O3:Er3+/Yb3+/Tm3+ nanophosphors," Journal of Nanophotonics 12(2), 026008 (26 April 2018). https://doi.org/10.1117/1.JNP.12.026008

Received: 27 December 2017; Accepted: 30 March 2018; Published: 26 April 2018

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available