TY - JOUR
T1 - Synthesis and photoluminescence properties of perovskite LaMg0.667Nb0.333O3:Mn4+,Bi3+
T2 - A novel deep-red phosphor for WLEDs
AU - Liu, Quan
AU - Chen, Zhuo
AU - Liu, Shuo
AU - Fan, Minghan
AU - Yang, Kai
AU - Guo, Jia
AU - Yu, Lei
AU - Liu, Zhenyu
AU - WONG, Ka-Leung
AU - Wei, Bo
N1 - Funding Information:
This work was supported by the Natural Science Foundation of Jiangsu Province (BK20191030), the Six Talent Peaks Project of Jiangsu Province (No. 2018-SWYY-001), the Hong Kong Research Grants Council General Research fund HKBU 12300118, and the NSFC (21701136, 51902031).
PY - 2020/10/14
Y1 - 2020/10/14
N2 - Red phosphors have kept booming in white light emitting diodes (WLEDs) during the past few years. Herein, a novel complex perovskite LaMg0.667Nb0.333O3:Mn4+,Bi3+ (LMN:Mn4+,Bi3+) deep-red phosphor was synthesized for the first time via a microwave irradiation method. Effective deep-red light peaking at 709 nm was observed when the phosphors were excited by near-ultraviolet (NUV) light. Based on the optimized concentration of Mn4+ in LMN, Bi3+ was selected as the sensitizer to further enhance the luminescence properties. Furthermore, the high thermal stability of the optimized co-doped phosphor was confirmed by thermal luminescence spectra compared to reported phosphors with similar structures. Finally, LED devices were fabricated based on commercial blue and green phosphors with NUV chips, and the results showed a high color rendering index (CRI, Ra = 85.5). All the performances imply great commercial potential as a deep-red phosphor for WLED applications.
AB - Red phosphors have kept booming in white light emitting diodes (WLEDs) during the past few years. Herein, a novel complex perovskite LaMg0.667Nb0.333O3:Mn4+,Bi3+ (LMN:Mn4+,Bi3+) deep-red phosphor was synthesized for the first time via a microwave irradiation method. Effective deep-red light peaking at 709 nm was observed when the phosphors were excited by near-ultraviolet (NUV) light. Based on the optimized concentration of Mn4+ in LMN, Bi3+ was selected as the sensitizer to further enhance the luminescence properties. Furthermore, the high thermal stability of the optimized co-doped phosphor was confirmed by thermal luminescence spectra compared to reported phosphors with similar structures. Finally, LED devices were fabricated based on commercial blue and green phosphors with NUV chips, and the results showed a high color rendering index (CRI, Ra = 85.5). All the performances imply great commercial potential as a deep-red phosphor for WLED applications.
UR - http://www.scopus.com/inward/record.url?scp=85094818453&partnerID=8YFLogxK
U2 - 10.1039/d0tc03211e
DO - 10.1039/d0tc03211e
M3 - Journal article
AN - SCOPUS:85094818453
SN - 2050-7526
VL - 8
SP - 13297
EP - 13305
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 38
ER -