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K2Te(Cs)日盲紫外光电阴极研究

Study on K2Te(Cs) Solar Blind Ultraviolet Cathode

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摘要

研究了K2Te(Cs)日盲紫外阴极的制作工艺并制作了K2Te(Cs)日盲紫外阴极.测量了K2Te(Cs)日盲紫外阴极样品的光谱响应、光谱反射率和250 nm波长激发条件下的荧光谱,测量结果表明:与Cs2Te日盲紫外阴极相比,在现有工艺条件下,K2Te(Cs)日盲紫外阴极的灵敏度高于Cs2Te日盲紫外阴极,光谱响应的峰值波长更短,位于250 nm,而长波截止波长位于336 nm;633 nm的光谱灵敏度为10-4 mA/W数量级,较Cs2Te日盲紫外阴极低一个数量级.光谱反射率测量结果表明:K2Te(Cs)日盲紫外阴极的光谱反射率在200~437 nm的波长范围内,均高于Cs2Te日盲紫外阴极,而在437~600 nm的波长范围内,反射率却与Cs2Te日盲紫外阴极基本相同;折射率及消光系数也低于Cs2Te日盲紫外阴极.荧光谱测试结果表明:在同样条件下,250~350 nm波长范围内,由于K2Te(Cs)紫外阴极的荧光强于Cs2Te紫外阴极,因此跃迁电子数量更多,阴极灵敏度更高,比较适用于日盲紫外探测成像器件的制造.

Abstract

The making process of K2Te(Cs) solar blind ultraviolet cathode was described and samples of K2Te(Cs) solar blind ultraviolet cathode were made. The spectral response, spectral reflectance and fluorescence spectra under the excitation condition of 250 nm wavelength about K2Te(Cs) and Cs2Te solar blind ultraviolet cathodes were measured. The measuring results showed that under the existing technological condition, the spectral response of K2Te(Cs) solar blind ultraviolet cathode is higher, the peak wavelength of spectral response is shorter than that of Cs2Te solar blind ultraviolet cathode. However, their long wavelength thresholds of both cathodes were basically same. The peak wavelength of spectral response of K2Te(Cs) cathode is about 250 nm, long wavelength threshold is about 336 nm. In addition, K2Te(Cs) solar blind ultraviolet cathode has better solar blind property; the spectral sensitivity at 633 nm is ranked at the order of magnitude of 10-4 mA/W, one order of magnitudes lower than that of Cs2Te solar blind ultraviolet cathode. As for the spectral reflectance, the measuring results showed that the spectral reflectance of K2Te(Cs) solar blind ultraviolet cathode is higher than that of Cs2Te solar blind ultraviolet cathode within the scope of 200~437 nm wavelength, however is basically same as that of Cs2Te solar blind ultraviolet cathode within the scope of 437~600 nm wavelength, the refractive index and extinction coefficient of K2Te(Cs) solar blind ultraviolet cathode are less than that of Cs2Te solar blind ultraviolet cathodeThe measuring results on fluorescence spectra indicated that under the same condition and within the scope of 250~350 nm wavelength, the fluorescence of K2Te(Cs) ultraviolet cathode is stronger than that of Cs2Te ultraviolet cathode, the more strongly the fluorescence, the more transition electrons and the higher spectral response of cathode. The properties of K2Te(Cs) solar blind ultraviolet cathode are better than that of Cs2Te solar blind ultraviolet cathode, and thus can be applied to image device for solar blind ultraviolet detection as well.

补充资料

中图分类号:O462.3

DOI:

基金项目:微光夜视技术重点实验室基金(No。 J2011016)资助

收稿日期:2013-08-05

修改稿日期:2013-10-15

网络出版日期:--

作者单位    点击查看

李晓峰:北方夜视技术股份有限公司,昆明 650223微光夜视技术重点实验室,西安 710065
赵学峰:北方夜视技术股份有限公司,昆明 650223
陈其钧:北方夜视技术股份有限公司,昆明 650223
王志宏:北方夜视技术股份有限公司,昆明 650223

联系人作者:李晓峰(lxf@nvt.com.cn)

备注:李晓峰(1963-),男,高级工程师,博士,主要研究方向为真空光电器件.

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引用该论文

LI Xiaofeng,ZHAO Xuefeng,CHEN Qijun,WANG Zhihong. Study on K2Te(Cs) Solar Blind Ultraviolet Cathode[J]. ACTA PHOTONICA SINICA, 2014, 43(6): 0625003

李晓峰,赵学峰,陈其钧,王志宏. K2Te(Cs)日盲紫外光电阴极研究[J]. 光子学报, 2014, 43(6): 0625003

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