共查询到18条相似文献,搜索用时 46 毫秒
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对长波光导MCT红外探测器进行了大电流长时间的冲击,对比了冲击前后探测器的电阻温度特性,并用该参数研究了器件的电学参数;测量了冲击前后探测器的黑体性能变化、响应光谱以及少子寿命. 实验结果显示:短时间(42mA, 70h)的电流冲击对探测器性能影响不大,探测器组分减小,截止波长变长;冲击时间长到(42mA, 100h)一定程度后,探测器性能有不同程度的下降,组分变大,截止波长变短. 这是因为电流产生的热效应加强了Hg扩散效应,从而使器件截止波长发生变化. 相似文献
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对长波光导MCT红外探测器进行了大电流长时间的冲击,对比了冲击前后探测器的电阻温度特性,并用该参数研究了器件的电学参数;测量了冲击前后探测器的黑体性能变化、响应光谱以及少子寿命.实验结果显示:短时间(42mA,70h)的电流冲击对探测器性能影响不大,探测器组分减小,截止波长变长;冲击时间长到(42mA,100h)一定程度后,探测器性能有不同程度的下降,组分变大,截止波长变短.这是因为电流产生的热效应加强了Hg扩散效应,从而使器件截止波长发生变化. 相似文献
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Jozef Piotrowski 《红外与毫米波学报》1990,9(1)
从理论和实验上详细研究了室温长波HgCdTe光导探测器,提出了室温光导半导体的广义优值,计算了10.6μm HgCdTe探测器的优值和极限性能与组分和掺杂的关系。用HgCdTe外延层制作了光导探测器,描述了它的性能。结果表明10.6μm室温光导探测器的最佳探测率可高于1×10~8cmHz~(1/2)/W,已接近一般的热敏型探测器性能。 相似文献
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JozefPiotrowski 《红外研究》1990,9(1):1-6
从理论和实验上详细研究了室温长波HgCdTe光导探测器,提出了室温光导半导体的议优值,计算了10.6μmHgCdTe探测器的优值和极限性能与组分和掺杂的关系。用HgCdTe外延层制作了光导探测器,描述了它的性能。结果表明 10.6μm室温光导探测器的最佳探测率可高于1×10^8chHz1/2/W,已接近一般的热敏型探测器性能。 相似文献
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在长波光导碲镉汞器件研制过程中,表面钝化是不可缺少的一个重要环节。在早期,表面钝化只进行阳极氧化处理。通过阳极氧化加ZnS复合钝化实验,得到了比较可靠的表面钝化层,并制造出了高性能、耐高温环境试验的实用化擦探测器芯片,文章对表面钝化层进行了分析。 相似文献
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文章报道了空间多谱扫描仪工外波段多元光导碲镉汞探测器的研制与优值。重点研究并解决了多元器件光谱曲线不一致性的问题,简述了器件的优值波段响应率R^Δλ1,波段探测率D^*Δλ和单色响应率Rλ的测试定标方法,以及器件控空间环境使用要求经历老练和环境条件试验的情况。测试结果表明多元件性能稳定可靠,各项指标均达到空间多谱扫描仪的技术要求。 相似文献
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长波光导HgCdTe探测器的输运特性 总被引:2,自引:0,他引:2
测量了长波光导HgCdTe线列探测器在1.2~300K的电阻率-温度(R-T)特性,结果表明:高性能和低性能探测元的R-T特性明显不同,前者有与正常HgCdTe材料R-T关系相似的变化规律,后者则与简并HgCdTe材料相似.探测器的性能与最大电阻温度有对应关系 相似文献
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J. Wenisch H. Bitterlich M. Bruder P. Fries R. Wollrab J. Wendler R. Breiter J. Ziegler 《Journal of Electronic Materials》2013,42(11):3186-3190
Due to continuous improvement of traditional liquid-phase epitaxy n-on-p technology, excellent mid-wavelength infrared HgCdTe (MCT) detectors with 1280 × 1024 pixels and 15 μm pitch size have been produced at AIM. At an operating temperature (T OP) of 80 K, a noise equivalent temperature difference (NETD) of 17.8 mK and an operability of 99.96% have been obtained. At T OP = 130 K, the operability remains high at 99.58%. On the basis of these results, the sensitivity of this detector design has been extended into the long-wavelength infrared (LWIR) region, obtaining a detector with an NETD of 30.4 mK and an operability of 99.81% at T OP = 80 K. In parallel, the growing maturity of molecular-beam epitaxy (MBE) growth of MCT on GaAs substrates has led to an improvement of the performance of the MWIR 640 × 512, 15-μm-pitch detector from an operability of 99.30% in 2011 to 99.83% recently. 相似文献
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描述了 Ge_xSi_(1-x)/Si 异质结长波长红外探测器的基本工作原理及结构,并结合器件介绍了实现异质结生长的各种工艺,如 MBE,CVD 等。 相似文献
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Takeji Ueda Zhenghua An Susumu Komiyama 《Journal of Infrared, Millimeter and Terahertz Waves》2011,32(5):673-680
Novel single-photon detectors, called Charge-sensitive Infrared Phototransistor (CSIP), have been developed in the long wavelength
infrared (LWIR) range. The devices are fabricated in GaAs/AlGaAs double-quantum-well (DQW) structure, and do not require ultralow
temperatures (T < 1 K) for operation. Figures of merit are determined in a T-range of 4.2 K∼30 K by using a homemade all-cryogenic spectrometer. We found that the photo-signal persists up to around
30 K. Excellent specific detectivity D
* = 9.6 × 1014 cm Hz1/2/W and noise equivalent power NEP = 8.3 × 10−19 W/Hz1/2 are derived up to T = 23 K. The dynamic range of detection exceeds 106, roughly ranging from attowatt to picowatt levels. These values are by a few orders of magnitude higher than that of the
state-of-the-art values of other detectors. Simple planar structure of CSIPs is feasible for array fabrication and will make
it possible to monolithically integrate with reading circuit. CSIPs are, therefore, not only extremely sensitive but also
suitable for practical use in wide ranging applications. 相似文献
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NIELin-ru MENGQing-lan LINan 《半导体光子学与技术》2004,10(2):93-96
For Hall measurement under different magnetic fields at LN2 temperature, Hg1-xCdxTe (MCT) film (radius 1 cm) grown on CdTe substrate by LPE is photoengraved into many small Van Der Pauw squares, then their Hall coefficients and mobilities are measured and analyzed, respectively. Two films were Hall-tested during the temperature range from LHe 4. 2K to about 200K. An actual impression on the uniformity of electrical parameters for MCT film can obtained by means of the methods presented in this paper. 相似文献