Structural and Optical Properties of Zn1-xCdxS Alloys

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Structural and Optical Properties of Zn_1-xCd_xS Alloys

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- Structural and Optical Properties of Zn_1-xCd_xS Alloys
- Chinese Journal of Luminescence Vol. 25, Issue 5, Pages: 515-518(2004)
- 作者机构：
  
  中国科学院长春光学精密机械与物理研究所激发态物理重点实验室,吉林长春,130033
- 作者简介：
- 基金信息：
- DOI：
  CLC： O472.3;O482.31
- Received：28 November 2003，
  
  Revised：20 May 2004，
  
  Published：20 September 2004
- 稿件说明：
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冯秋菊, 申德振, 张吉英, 单崇新, 张振中, 吕有明, 刘益春, 范希武. Zn1-xCdxS合金薄膜的结构和光学性质[J]. 发光学报, 2004,(5): 515-518

FENG Qiu-ju, SHEN De-zhen, ZHANG Ji-ying, SHAN Chong-xin, ZHANG Zhen-zhong, LÜ You-ming, LIU Yi-chun, FAN X W. Structural and Optical Properties of Zn1-xCdxS Alloys[J]. Chinese Journal of Luminescence, 2004,(5): 515-518
冯秋菊, 申德振, 张吉英, 单崇新, 张振中, 吕有明, 刘益春, 范希武. Zn1-xCdxS合金薄膜的结构和光学性质[J]. 发光学报, 2004,(5): 515-518 DOI：

FENG Qiu-ju, SHEN De-zhen, ZHANG Ji-ying, SHAN Chong-xin, ZHANG Zhen-zhong, LÜ You-ming, LIU Yi-chun, FAN X W. Structural and Optical Properties of Zn1-xCdxS Alloys[J]. Chinese Journal of Luminescence, 2004,(5): 515-518 DOI：

摘要

采用低压金属有机化学气相沉积(LPMOCVD)技术

在普通石英衬底上制备出不同Cd组分(0.02

0.44

0.59

0.83

0.91)的Zn

1-x

S合金薄膜材料.X射线测量表明样品为单一取向的纤锌矿结构

并且随着x的增加衍射峰位基本成线性地从ZnS衍射峰向CdS衍射峰移动.此外

在PL谱中还可以看出随着样品中Cd含量的增加

发光峰从3.66eV红移到2.43eV.根据发光峰位与Zn

1-x

S中x的变化关系

推导出它们之间的关系近似为

(Zn

1-x

S)=3.61-1.56x+0.38x

.还探讨了不同Cd组分薄膜材料的X射线衍射峰半峰全宽以及发光峰半峰全宽的变化.

Abstract

Both CdS and ZnS crystals are Ⅱ-Ⅵ semiconductors and photonic materials having the direct band gaps.Since the wavelength corresponding to the band-gap of CdS is green 500 nm that is very sensitive for human eyes

the CdS thin film is useful for the sensor and the light source.For the CdS thin film produced by pulsed laser deposition (PLD)

we first demonstrated the laser oscillation at room temperature excited with He-Cd laser.On the other hand

ZnS has been used for the fluorescence materials with the various doped elements.The band-gap of ZnS is so large (3.6 eV) that has been applied for the quantum well

the blue LED and the optical waveguide.Zn

1-x

S alloy thin films were prepared on quartz substrate by low-pressure metalorganic chemical vapor deposition (MOCVD).The x values of Zn

1-x

S are 0

0.02

0.44

0.59

0.83

0.91 and 1.X-ray diffraction (XRD) spectra indicate that all the as-grown alloys with hexagonal wurzite structure was obtained.As the Cd content increases

the luminescence peaks of the samples redshift from 3.66 eV to 2.43 eV in the photoluminescence (PL) spectra.Based on the PL peak position of the alloy with different Cd composition

the relation of Zn

1-x

S emission peak with x was obtained as E

(Zn

1-x

S)=3.61-1.56x+0.38x

.The dependence of the PL peak position and the full width at half maximum(FWHM) of the diffraction peak and PL peak on Cd composition were also discussed.It is found that when x increases from 0 to 1

the PL peak position changes from 3.66 eV to 2.43 eV;but the FWHM increases and reaches a maximum when x=0.83

then it decreases sharply.

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