Year: 2012
Type: article
Abstract: The effects of surface passivation on the photoluminescence (PL) properties of CdS nanoparticles oxidized by straightforward H2O2 injection were examined. Compared to pristine cadmium sulfide nanocrystals (quantum efficiency ≅ 0.1%), the surface-passivated CdS nanoparticles showed significantly enhanced luminescence properties (quantum efficiency ≅ 20%). The surface passivation by H2O2 injection was characterized using X-ray photoelectron spectroscopy, X-ray diffraction, and time-resolved PL. The photoluminescence enhancement is due to the two-order increase in the radiative recombination rate by the sulfate passivation layer.
Source: Nanoscale Research Letters
Authors: Woojin Lee, Hoechang Kim, Dae-Ryong Jung, Jongmin Kim, Changwoo Nahm, Junhee Lee, Suji Kang, Byungho Lee, Byungwoo Park
Institution: Seoul National University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,790
Awards: G1111179299, G2198712800, G6124864139
OpenAlex ID: W2165026558