Fang Mu-Huai, Ni Chenchen, Zhang Xuejie, Tsai Yi-Ting, Mahlik Sebastian, Lazarowska Agata, Grinberg Marek, Sheu Hwo-Shuenn, Lee Jyh-Fu, Cheng Bing-Ming, Liu Ru-Shi
Department of Chemistry, National Taiwan University , Taipei 106, Taiwan.
Institute of Experimental Physics, Faculty of Mathematics, Physics and Informatics, University of Gdańsk , 80-308 Gdańsk, Poland.
ACS Appl Mater Interfaces. 2016 Nov 16;8(45):30677-30682. doi: 10.1021/acsami.6b10233. Epub 2016 Nov 4.
A new concept called "full-spectrum lighting" has attracted considerable attention in recent years. Traditional devices are usually combined with ultraviolet-light-emitting diode (LED), red, green, and blue phosphors. However, a cyan cavity exists in the 480-520 nm region. Hence, cyan phosphors are needed to compensate for the cavity. (Sr,Ba)(PO)Cl:Eu phosphors feature an extremely unique and tunable photoluminescence spectrum. Nevertheless, the tuning mechanisms of these phosphors remain unclear. In this study, we elucidate the mechanism of the cation size-controlled activator uneven-occupation and reoxidation in (Sr,Ba)(PO)Cl:Eu phosphors. This mechanism could help tune the optical properties of related apatite families and structures with multiple cation sites and strongly uneven occupation of activators and cations. Finally, the package of the LED device is constructed to show that both color rendering index Ra and R9 are higher than 95. Thus, the device could be a potential candidate for full-spectrum lighting.
近年来，一个名为“全光谱照明”的新概念引起了广泛关注。传统器件通常与紫外发光二极管（LED）、红色、绿色和蓝色磷光体相结合。然而，在480-520纳米区域存在一个青色空洞。因此，需要青色磷光体来补偿这个空洞。(Sr,Ba)(PO)Cl:Eu磷光体具有极其独特且可调节的光致发光光谱。然而，这些磷光体的调节机制仍不清楚。在本研究中，我们阐明了(Sr,Ba)(PO)Cl:Eu磷光体中阳离子尺寸控制的激活剂不均匀占据和再氧化的机制。该机制有助于调节相关磷灰石家族以及具有多个阳离子位点且激活剂和阳离子占据严重不均匀的结构的光学性质。最后，构建了LED器件的封装，结果表明显色指数Ra和R9均高于95。因此，该器件可能是全光谱照明的潜在候选者。
