NER: Novel Electrochemically Self Assembled Nanowire Infrared Photodetectors

NER：新型电化学自组装纳米线红外光电探测器

• 批准号: 0206950
• 负责人: Supriyo Bandyopadhyay
• 金额: $ 8.85万
• 依托单位: Virginia Commonwealth University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-06-15 至 2004-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0206950&HistoricalAwards=false
• 关键词: NER; Novel; Electrochemically; Self; Assembled

This research is focused on demonstrating novel ROOM TEMPERATUREinfrared photodetectors based on electrochemically self assembled nanowirearrays. Photodetection is based on photoexcitation of electrons fromsubband states in the nanowire to trap states in the surroundinginsulator. This leads to an "inverse" photodetection effect whereby the conductivity of the photodetector drops when irradiated with infrared radiation.Preliminary experiments [Appl. Phys. Lett., Vol. 79, 4423 (2001)] haveshown that these photodetectors can operate at room temperature with asignal to noise ratio of 45 dB. The purpose of the NER project willbe to extend this result to create (1) multi-colored detectors usingdifferent sized nanowires self assembled on the same wafer, and (2) acomplementary photodetector where a normal photodetector is synthesizedin series with an inverse photodetector. The complementary photodetectorwill be able to detect a very narrow band.This research will involve significant work by undergraduate students.The samples that exhibited the novel photodetection effect wereprepared by an undergraduate student in the PI's lab.

这项研究的重点是展示基于电化学自组装纳米线阵列的新型室温红外光电探测器。光电检测基于电子从纳米线中的子带态到周围绝缘体中的陷阱态的光激发。这导致了“逆”光电检测效应，即光电检测器的电导率在受到红外辐射照射时下降。物理。快报，卷。 [79, 4423 (2001)] 表明这些光电探测器可以在室温下工作，信噪比为 45 dB。 NER 项目的目的是扩展这一成果，以创建 (1) 使用在同一晶圆上自组装的不同尺寸纳米线的多色探测器，以及 (2) 互补光电探测器，其中正常光电探测器与反向光电探测器串联合成。互补光电探测器将能够探测非常窄的波段。这项研究将涉及本科生的大量工作。表现出新颖光电探测效应的样品是由 PI 实验室的一名本科生准备的。