White emitting polyfluorene functionalized with azide hybridized on near-UV light emitting diode for high color rendering index.
We develop and demonstrate high-quality white light generation that relies on the use of a single-type simple conjugated polymer of polyfluorene functionalized with azide groups (PFA) integrated on a near-UV LED platform. The high-quality white emission from the polyfluorene is achieved by using the azide functionalization to facilitate cross-linking intentionally when cast into solid-state form. Hybridized on n-UV InGaN/GaN LED at 378 nm, the PFA emitters collectively generate a very broad down-converting photoluminescence at longer wavelengths across the entirety of the visible spectrum, yielding high color rendering indices up to 91.
Department of Physics, Department of Chemistry, Department of Electrical and Electronics Engineering, Bilkent University, Bilkent, Ankara, Turkey 06800.
Ilkem Ozge
IO
Huyal
Tuncay
T
Ozel
Unsal
U
Koldemir
Sedat
S
Nizamoglu
Donus
D
Tuncel
Hilmi Volkan
HV
Demir
D001386:Azides / Q000737:chemistry*; D003116:Color; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005449:Fluorenes / Q000737:chemistry*; D008027:Light; D008029:Lighting / Q000295:instrumentation*; D012666:Semiconductors; D014466:Ultraviolet Rays
D001386:Azides; D005449:Fluorenes; C041509:fluorene