Abstract：
:We report an effective and rare-earth free light conversion material synthesized via a facile fabrication route, in which organic fluorescent dyes, i.e. Rhodamine B (RhB) and fluorescein isothiocyanate (FITC) are embedded into activated boron nitride (αBN) to form a composite phosphor. The composite phosphor shows highly efficient Förster resonance energy transfer and greatly improved thermal stability, and can emit at broad visible wavelengths of 500-650 nm under the 466 nm blue-light excitation. By packaging of the composite phosphors and a blue light-emitting diode (LED) chip with transparent epoxy resin, white LED with excellent thermal conductivity, current stability and optical performance can be realized, i.e. a thermal conductivity of 0.36 W/mk, a Commission Internationale de 1'Eclairage color coordinates of (0.32, 0.34), and a luminous efficiency of 21.6 lm·W(-1). Our research opens the door toward to the practical long-life organic fluorescent dyes-based white LEDs.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Li J,Lin J,Huang Y,Xu X,Liu Z,Xue Y,Ding X,Luo H,Jin P,Zhang J,Zou J,Tang Cdoi
10.1038/srep08492subject
Has Abstractpub_date
2015-02-16 00:00:00pages
8492issn
2045-2322pii
srep08492journal_volume
5pub_type
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