Ultraintense Zero-Phonon Line from a Mn4+ Red-Emitting Phosphor for High-Quality Backlight Display Applications

作者：Zhou, Qiang^*; Wan, Jing; Zhou, Yayun^*; Zhang, Shuai; Shi, Dongxin; Xie, Xiaoling; Pu, Haiqi; Ye, Yanqing; Wang, Zhengliang^*

来源：Inorganic Chemistry, 2021, 60(24): 19197-19205.

DOI：10.1021/acs.inorgchem.1c02938

• LUMINESCENCE
• CRYSTAL
• STABILITY
• SYMMETRY
• RB
• CS

The zero-phonon line (ZPL) of Mn4+, which highly depends on its local environment, is usually much weaker than the vibrational phonon sidebands. In this work, an ultraintense ZPL emission, coming from a brand new red-emitting Rb2LiGaF6:Mn4+ (RLGFM) phosphor upon blue light excitation, is presented. The interesting spectral characteristic originates from the nonequivalent substitution of Mn4+ for Ga3+ in a rigid octahedral structure with a low symmetry, which induces neighboring cation vacancies that distort the local symmetry of the [MnF6] octahedra. Benefiting from the ultraintense ZPL emission, a wide color gamut is achieved using RLGFM and beta-SiAlON:Eu2+ as color converters. Moreover, a comprehensive investigation on the thermal quenching behavior is also conducted to provide detailed insights to explore novel Mn4+ red phosphors for high-quality backlight display applications.

• 单位
  云南大学