Preparation of quantum dots by the sol-gel process

Masayuki Yamane; Toshimi Takada; John D. Mackenzie; Chia-Yen Li

doi:10.1117/12.132050

7 December 1992 Preparation of quantum dots by the sol-gel process

Masayuki Yamane, Toshimi Takada, John D. Mackenzie, Chia-Yen Li

Proceedings Volume 1758, Sol-Gel Optics II; (1992) https://doi.org/10.1117/12.132050
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

The preparation of semiconductor dots with high number density and narrow particle size distribution, which are essential for high nonlinearity susceptibility, has been studied on CdS dispersed soda-borosilicate glasses by the sol-gel process using tetramethoxysilane (TMOS), triethylborate (B(OEt)₃), sodium acetate (NaOAc) and cadmium acetate (Cd(OAc)₂) as the starting materials. Both number density and particle size distribution of the CdS crystallites were dependent upon the treatment conditions in the conversion of Cd(OAc)₂ to CdO and CdO to CdS inside the porous gel. The optimum heat-treatment temperature for the conversion of Cd(OAc)₂ to CdO was around 400 degree(s)C, and that for the conversion of CdO and CdS by exposing the gel to H₂S was around 120 degree(s)C. Glass containing about 10 wt% CdS crystallites 4 - 7 nm in diameter was obtained by sintering the gel at 590 degree(s)C under the above treatment conditions.

Citation Download Citation

Masayuki Yamane, Toshimi Takada, John D. Mackenzie, and Chia-Yen Li "Preparation of quantum dots by the sol-gel process", Proc. SPIE 1758, Sol-Gel Optics II, (7 December 1992); https://doi.org/10.1117/12.132050

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