退火对CdS/SiO2介孔组装体系吸收边的影响

复合材料学报, 2003, 20(2): 47-52. doi: 10.3321/j.issn:1000-3851.2003.02.009

退火对CdS/SiO2介孔组装体系吸收边的影响

杨一军 ^1, , 阚彩侠 ^2, , 毕会娟 ^3, , 张立德 ^4,

1.安徽淮北煤炭师范学院,物理系,淮北,235000;中科院,固体物理研究所,安徽,合肥,230031

2.中科院,固体物理研究所,安徽,合肥,230031

3.中科院,固体物理研究所,安徽,合肥,230031

4.中科院,固体物理研究所,安徽,合肥,230031

基金项目: 安徽省教育厅自然科学基金(2001kj201ZC)

关键词： CdS纳米颗粒 , 介孔组装体系 , 吸收边

ANNEALING EFFECT ON THE ABSORPTION EDGE OF CdS/SiO2 MESOPOROUS ASSEMBLY

本文作者通过溶胶-凝胶法获得块材CdS纳米颗粒/介孔SiO2组装体系(CdS/SiO2)块体样品,室温下的拉曼谱中观察到CdS的两个特征峰;在氮气和空气气氛中退火处理后,发现吸收边位置随复合量和退火温度不同而移动.经计算,CdS颗粒粒径的理论值与其自由激子半径相当,说明吸收边的移动起因于量子限域效应.

参考文献

[1]	张立德,蔡伟平,牟季美. 纳米微粒/介孔固体组装体系的物性研究 [J]. 自然科学进展,1999, 9(2):103-110.
[2]	Cai W P, Tan M, Zhang L D, et al. Reversible transition between transparency and opacity for the porous silica host dispersed with silver nanometer particles within its pores [J]. Appl Phys Lett, 1996, 69(20): 2980-2982.
[3]	Wu C G, Bein T. Conducting polyaniline filaments in a mesoporous channel host [J]. Science, 1994, 264: 1757-1759.
[4]	Srdanov V I, Alxneit I, Studky G D, et al. Optical properties of GaAs confined of MCM-41 [J]. J Phys Chem B, 1998, 102(18): 3341-3344.
[5]	Coffer J L, Beauchamp G, Zerga T W. Porous silica glasses doped with quantum-confined cadmium selenide [J]. J Non-Cryst Solids, 1992, 142: 208-213.
[6]	Wang C R, Tang K B, Yang Q, et al. Growth of Pb5S2I6 meso-scale tubular crystals [J]. J Cryst Growth, 2001, 226: 175-178.
[7]	Cai W P, Zhang L D. Synthesis and structural and optical properties of mesoporous silica containing silver nanoparticles [J]. J Phys: Condens Matter, 1997, 9: 7257-7267.
[8]	Balandin A, Wang K L, Kouklin N, et al. Raman spectroscopy of electrochemically self-assembled CdS quantum dots [J]. Appl Phys Lett,2000, 76(2): 137-139.
[9]	Furukawa S, Miyasato T. Quantum size effects on the optical band gap of microcrystalline Si∶H [J]. Phys Rev B, 1988, 38(8): 5726-5729.
[10]	Brus L. Electronic wave functions in semiconductor clusters: experiment and theory [J]. J Phys Chem, 1986, 90(12): 2555-2560.
[11]	Schmidt H M, Weller H. Quantum size effects in semiconductor crystallites:calculation of the energy spectrum for confined exciton [J]. Chem Phys Lett, 1986, 129(6): 615-618.
[12]	Uda H, Ikegami S, Sonomura H . Structural and electrical properties of chemical -solution -deposited CdS films for solar cells [J]. Jnp J Appl Phys,1990, 29(1):30-33.

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退火对CdS/SiO2介孔组装体系吸收边的影响

ANNEALING EFFECT ON THE ABSORPTION EDGE OF CdS/SiO2 MESOPOROUS ASSEMBLY

参考文献