异质结InP/InGaAs探测器欧姆接触温度特性研究
为了研究异质结InP/InGaAs探测器帽层的欧姆接触特性,采用Au/p-InP传输线模型(TLM),对比不同退火温度下的接触特性,在480℃、30 s的退火条件下实现室温比接触电阻为3.84×10-4Ω·cm2,同时,对欧姆接触的温度特性进行了研究,发现随着温度降低比接触电阻增加,在240~353 K温度范围内界面电流传输主要为热电子-场发射机制(TFE);240 K以下,接触呈现肖特基特性.利用扫描电子显微镜(SEM)和X射线衍射仪(XRD)分别对界面处的扩散程度和化学反应进行了分析,发现经过480℃、30 s退火后样品界面处存在剧烈的互扩散,反应产物Au10In3有利于改善Au/p-In...
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Published in | 红外与毫米波学报 Vol. 34; no. 6; pp. 721 - 725 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
中国科学院上海技术物理研究所传感技术国家重点实验室,上海200083
2015
中国科学院大学,北京100049%中国科学院上海技术物理研究所传感技术国家重点实验室,上海200083 中国科学院上海技术物理研究所红外成像材料与器件重点实验室,上海200083 |
Subjects | |
Online Access | Get full text |
ISSN | 1001-9014 |
DOI | 10.11972/j.issn.1001-9014.2015.06.016 |
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Summary: | 为了研究异质结InP/InGaAs探测器帽层的欧姆接触特性,采用Au/p-InP传输线模型(TLM),对比不同退火温度下的接触特性,在480℃、30 s的退火条件下实现室温比接触电阻为3.84×10-4Ω·cm2,同时,对欧姆接触的温度特性进行了研究,发现随着温度降低比接触电阻增加,在240~353 K温度范围内界面电流传输主要为热电子-场发射机制(TFE);240 K以下,接触呈现肖特基特性.利用扫描电子显微镜(SEM)和X射线衍射仪(XRD)分别对界面处的扩散程度和化学反应进行了分析,发现经过480℃、30 s退火后样品界面处存在剧烈的互扩散,反应产物Au10In3有利于改善Au/p-InP的接触性能. |
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Bibliography: | 31-1577/TN CAO Gao-Qi,TANG Heng-Jing,LI Tao,SHAO Xiu-Mei,LI Xue,GONG Hai-Mei( 1. State Key Laboratory of Transducer Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China; 2. Key Laboratory of Infrared Imaging Materials and Detectors, Chinese Academy of Sciences, Shanghai 200083, China; 3. University of Chinese Academy of Sciences, Beijing 100049, China) p-InP; ohmic contact; special contact resistance; scanning electron microscope(SEM); Xray diffractometer(XRD) The contact characteristics of Au / p-InP in hetero-junction InP /InGaAs detector were studied in this work. Under the annealing condition of 480℃ for 30 s,the ohmic contact was formed with the room-temperature special contact resistance 3. 84 × 10~(- 4)Ω·cm~2. Temperature-dependent characteristics of ohmic contact were investigated. The results indicate that the special contact resistance increases with decreasing temperature,the current transmission mechanism at the interface is thermion-field emission |
ISSN: | 1001-9014 |
DOI: | 10.11972/j.issn.1001-9014.2015.06.016 |