title: Red-emitting silicon quantum dot phosphors in warm white LEDs with excellent color rendering.
abstract: We demonstrate red-emitting silicon quantum dot (SiQD) phosphors as a low-cost and environment-friendly alternative to rare-earth element phosphors or CdSe quantum dots. After surface passivation, the SiQD-phosphors achieve high photoluminescence quantum yield = 51% with 365-nm excitation. The phosphors also have a peak photoluminescence wavelength at 630 nm and a full-width-at-half-maximum of 145 nm. The relatively broadband red emission is ideal for forming the basis of a warm white spectrum. With 365-nm or 405-nm LED pumping and the addition of green- and/or blue-emitting rare-earth element phosphors, warm white LEDs with color rendering index ~95 have been achieved.
authors.forename: Chang-Ching
authors.initials: CC
authors.lastname: Tu
authors.forename: Ji H
authors.initials: JH
authors.lastname: Hoo
authors.forename: Karl F
authors.initials: KF
authors.lastname: Böhringer
authors.forename: Lih Y
authors.initials: LY
authors.lastname: Lin
authors.forename: Guozhong
authors.initials: G
authors.lastname: Cao