Insight into a novel rare‐earth‐free red‐emitting phosphor Li3Mg2NbO6:Mn4+: Structure and luminescence properties. Issue 11 (15th May 2019)

• Record Type: Journal Article
• Authors: Wang, Xicheng; Zhou, Xiaopeng; Cao, Yaxin; Wei, Qi; Zhao, Zhengyan; Wang, Yuhua
• Is Part Of: Journal of the American Ceramic Society. Volume 102:Issue 11(2019)
• Page Start: 6724
• Page End: 6731
• Publication Date: 2019-05-15
• Subjects: calculation -- luminescence materials -- Mn4+ -- phosphor -- photoluminescence; Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.16527
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: Red phosphor is indispensable to achieve warm white light in the white light diode (WLED) application. However, the current red phosphors suffer from high cost and harsh synthesis conditions. In this study, an oxide‐based rare‐earth‐free red‐emitting phosphor Li3 Mg2 NbO6 :Mn 4+ (LMN:Mn 4+ ) has been successfully synthesized by a simple solid‐state reaction method. The relationship between crystal structure and luminescence was investigated in detail. The site occupancy of the doping Mn 4+ ion in the LMN host has been discussed from the point of bond valence sum. How the coordination environment of doping Mn 4+ affects the energy level of doping Mn 4+ ion has been illustrated via the Tanabe‐Sugano energy‐level diagram. Moreover, warm white light has been obtained using LMN:Mn 4+ as compensator to the YAG:Ce 3+ . Abstract : Good warm white light has been achieved by combing LMN:Mn 4+ with YAG:Ce 3+ phosphor.