期刊
ADVANCED MATERIALS
卷 29, 期 37, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201700778
关键词
blue phosphors; fluorescent dyes; hosts; metal-organic frameworks; white-light-emitting diodes
类别
资金
- Major State Basic Research Development Program of China (973 Program) [2014CB845603]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB20010200]
- National Science Foundation of China [21203194]
The unique features of the metal-organic frameworks (MOFs), including ultrahigh porosities and surface areas, tunable pores, endow the MOFs with special utilizations as host matrices. In this work, various neutral and ionic guest dye molecules, such as fluorescent brighteners, coumarin derivatives, 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM), and 4-(p-dimethylaminostyryl)-1-methylpyridinium (DSM), are encapsulated in a neutral MOF, yielding novel blue-, green-, and red-phosphors, respectively. Furthermore, this study introduces the red-, green-, and blue-emitting dyes into a MOF together for the first time, producing white-light materials with nearly ideal Commission International ed'Eclairage (CIE) coordinates, high color-rendering index values (up to 92%) and quantum yields (up to 26%), and moderate correlated color temperature values. The white light is tunable by changing the content or type of the three dye guests, or the excitation wavelength. Significantly, the introduction of blue-emitting guests in the methodology makes the available MOF host more extensive, and the final white-light output more tunable and high-quality. Such strategy can be widely adopted to design and prepare white-light-emitting materials.
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