An effective oxidation approach for luminescence enhancement in CdS quantum dots by H2O2

作者：Lee Woojin; Kim Hoechang; Jung Dae Ryong; Kim Jongmin; Nahm Changwoo; Lee Junhee; Kang Suji; Lee Byungho; Park Byungwoo^*

来源：Nanoscale Research Letters, 2012, 7(1): 672.

DOI：10.1186/1556-276X-7-672

• Photoluminescence
• Surface passivation
• Quantum efficiency

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 a parts per thousand... 0.1%), the surface-passivated CdS nanoparticles showed significantly enhanced luminescence properties (quantum efficiency a parts per thousand... 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.

• 出版日期2012-12-12