Luminescent properties of a new red-emitting phosphor based on LaInO3 for LED

Red-emitting phosphor LaInO3:Eu3+ for LED was synthesized by solid-state reaction at 1250 degrees C. X-ray diffraction, particle size analyzer and spectrometer were used to characterize the phosphor. The prepared LaInO3:Eu3+ phosphor has an orthorhombic crystal structure with pure phase and the average diameter of LaInO3:Eu3+, Bi3+ particles is about 2.15 mu m. The phosphor LaInO3: Eu3+ can be efficiently excited by near ultraviolet and blue light to emit intense red light at 612 nm due to the Eu3+ transition of D-5(0)-> F-7(2). The emission intensity is the strongest when the Eu3+ content reaches 0.20 mole fraction. The optimal Bi3+ concentration in the LaInO3:0.20Eu(3+) is 0.03 mole fraction. The luminescence intensity of the LaInO3:0.20Eu(3+), 0.03Bi(3+) is higher than that of without Bi3+ phosphor. The results indicate that LaInO3:Eu3+, Bi3+ phosphor is a prospective potoluminescent material for white LED.