SPECTROMETRIC STUDY OF SIZE QUANTIZATION EFFECTS OF ULTRAFINE SULFIDE SEMICONDUCTOR PARTICLES

doi:10.7517/j.issn.1674-0475.1995.02.97

Imaging Science and Photochemistry ›› 1995, Vol. 13 ›› Issue (2): 97-102.DOI: 10.7517/j.issn.1674-0475.1995.02.97

SPECTROMETRIC STUDY OF SIZE QUANTIZATION EFFECTS OF ULTRAFINE SULFIDE SEMICONDUCTOR PARTICLES

FAN CHANG-YU, LIXUE-PING, ZHANG ZHEN-ZONG, XIAO XU-RUI

The Center of Phototlectrochemistry, Institute of Photographic Chemistry, The Chinese Academy of Sciences, Beijing 100101, P. R. China

Received:1994-05-17 Revised:1994-10-26 Online:1995-05-20 Published:1995-05-20

Abstract

Abstract: Nanometer sized sulfide semiconductor ultrafine particles(CdS,ZnS,PbS and Bi₂S₃)were prepared in aqueous solution by colloidal chemical methods. The particle sizes deter-mined by TEM are below 10 nm. The size quantum effects and optical properties of theresulfide ultrafine particles as well as the influence of the chemical enviroment and conditionparameters of particle formation in the preparation procedure were studied in detail.Significant changes were observed in optical absorption and Raman spectra.When add suitable surface modification agents and stabilizers,keep the solution pH in suitable range, present anexcess of metal ions,it can be found that the absorption edges shift to the shorter wave-length and pronounced structrued peaks exhibit,and characteristic resonance Raman peaks(for CdS particles)gradually decrease,indicating the decrease of particle sizes and clear sizequantum effects.

Key words: semiconductor, ultrafine particle, size quantum effect

FAN CHANG-YU, LIXUE-PING, ZHANG ZHEN-ZONG, XIAO XU-RUI. SPECTROMETRIC STUDY OF SIZE QUANTIZATION EFFECTS OF ULTRAFINE SULFIDE SEMICONDUCTOR PARTICLES[J]. Imaging Science and Photochemistry, 1995, 13(2): 97-102.

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SPECTROMETRIC STUDY OF SIZE QUANTIZATION EFFECTS OF ULTRAFINE SULFIDE SEMICONDUCTOR PARTICLES

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