Surface passivation dependent photoluminescence from silicon quantum dot phosphors

Abstract

We demonstrate wavelength-tunable, air-stable and nontoxic phosphor materials based on silicon quantum dots (SiQDs). The phosphors, which are composed of micrometer-size silicon particles with attached SiQDs, are synthesized by an electrochemical etching method under ambient conditions. The photoluminescence (PL) peak wavelength can be controlled by the SiQD size due to quantum confinement effect, as well as the surface passivation chemistry of SiQDs. The red-emitting phosphors have PL quantum yield equal to 17%. The SiQD-phosphors can be embedded in polymers and efficiently excited by 405 nm light-emitting diodes for potential general lighting applications.

© 2012 Optical Society of America

Brightly photoluminescent phosphor materials based on silicon quantum dots with oxide shell passivation

Chang-Ching Tu, Qifeng Zhang, Lih Y. Lin, and Guozhong Cao
Opt. Express 20(S1) A69-A74 (2012)

Red-emitting silicon quantum dot phosphors in warm white LEDs with excellent color rendering

Chang-Ching Tu, Ji H. Hoo, Karl F. Böhringer, Lih Y. Lin, and Guozhong Cao
Opt. Express 22(S2) A276-A281 (2014)

Evaluation of low-cadmium ZnCdSeS alloyed quantum dots for remote phosphor solid-state lighting technology

Peter Siffalovic, Dominika Badanova, Andrej Vojtko, Matej Jergel, Martin Hodas, Marco Pelletta, Dusan Sabol, Marek Macha, and Eva Majkova
Appl. Opt. 54(23) 7094-7098 (2015)

Nonradiative energy transfer between colloidal quantum dot-phosphors and nanopillar nitride LEDs

Fan Zhang, Jie Liu, Guanjun You, Chunfeng Zhang, Suzanne E. Mohney, Min Joo Park, Joon Seop Kwak, Yongqiang Wang, Daniel D. Koleske, and Jian Xu
Opt. Express 20(S2) A333-A339 (2012)

Perspective on synthesis, device structures, and printing processes for quantum dot displays

Jaehoon Lim, Wan Ki Bae, Jeonghun Kwak, Seonghoon Lee, Changhee Lee, and Kookheon Char
Opt. Mater. Express 2(5) 594-628 (2012)