Patent ID: 8974697
Filing Date: 2015-03-10
Classification: C09K,H01L,H05B

Abstract:
1. A light-emitting device comprising: a light-emitting element which emits light having an emission peak in a wavelength range of 380 to 490 nm, the element having a peak wavelength in steady-state driving shifted by 6 nm or more toward longer wavelength as compared to a peak wavelength at initial driving; and a luminous layer comprising a red-emitting luminescent material which receives light from the light-emitting element to emit red light, the red-emitting luminescent material having a composition represented by formula 1: wherein p, x, A, B, C and D satisfy following conditions: the luminous layer further comprising a green-emitting luminescent material which receives light from the light-emitting element to emit green light.