A red phosphor BaTiF(6):Mn(4+): reaction mechanism, microstructures, optical properties, and applications for white LEDs.
Red phosphors BaTiF6:Mn(4+) with microrod and polyhedron morphologies have been prepared respectively by etching TiO2 and Ti(OC4H9)4 in a HF solution with an optimized concentration of KMnO4 at 1.5 mmol L(-1) in hydrothermal conditions. The red phosphor BaTiF6:Mn(4+) exhibits a broad excitation band in the blue region and sharp emission peaks in the red region. A white LED (WLED) fabricated with the red phosphor BaTiF6:Mn(4+) shows "warm" white light that possesses a color rendering index of 93.13 at a color temperature of 4073.1 K.
Nanomaterials and Chemistry Key Laboratory, Faculty of Chemistry and Materials Engineering, Wenzhou University, Zhejiang Province, Wenzhou 325027, P. R. China. yxpan8@gmail.com smhuang@wzu.edu.cn.
Xianyu
X
Jiang
Zhen
Z
Chen
Shaoming
S
Huang
Jiaguo
J
Wang
Yuexiao
Y
Pan