公开(公告)号：US20170194535A1

公开(公告)日：2017-07-06

申请号：US15237806

申请日：2016-08-16

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jong Won PARK ,  Woon Seok KIM ,  Sang Hoon AHN ,  Ji Ho YOU ,  Chul Soo YOON

IPC: H01L33/50 ,  F21V8/00 ,  G02F1/1335 ,  H01L33/56

CPC classification number: H01L33/504 ,  G02B6/0015 ,  G02F1/133514 ,  G02F1/133603 ,  G02F2001/133614 ,  G02F2202/36 ,  H01L33/507 ,  H01L33/56 ,  H01L2224/48091 ,  H01L2224/48111 ,  H01L2224/48247 ,  H01L2224/48257 ,  H01L2924/181 ,  H01L2924/00014 ,  H01L2924/00012

Abstract: A white light emitting device includes a blue light emitting diode emitting first light having a dominant wavelength in a range of 440 nm to 460 nm, a quantum dot disposed on a path of the emitted first light and converting a first portion of the emitted first light into green light, and a fluoride phosphor disposed on the path of the emitted first light and converting a second portion of the emitted first light into red light. The quantum dot includes a core formed of a group III-V compound and a shell formed of a group II-VI compound, and the fluoride phosphor is represented by empirical formula AxMFy:Mn4+, A being at least one selected from Li, Na, K, Rb, and Cs, M being at least one selected from Si, Ti, Zr, Hf, Ge, and Sn, and the empirical formula satisfying 2≦x≦3 and 4≦y≦7.