Current-controlled electroluminescence from light-emitting diodes based on Tm, Er, and Eu codoped Ga2O3 thin films

Abstract

Abstract In this work, we report on the demonstration of an LED based on Tm, Er, and Eu codoped Ga2O3 thin film. Current-controlled electroluminescence (EL) has been observed from the Ga2O3:(Tm+Er+Eu)-based LED with a relatively low driven voltage of ∼9 V. The EL spectra reveal that the observed light emission results from the combination of simultaneous blue, green, and red emissions from Tm3+, Er3+, and Eu3+ ions, respectively. This strategy for LED shows great potential to achieve full color (white light) by intentionally changing the concentrations of Tm3+, Er3+, and Eu3+ ions in Ga2O3 without using any other phosphors.