Simple fabrication of SWIR detectors based on wet deposition of carbon nanotubes and quantum dots
| Autor: | Ela Sachyani Keneth, Eyal Cohen, Youngjin Jang, Yossi Paltiel, Shira Yochelis, Lilach Saltoun Raz, Arthur Shapiro, Efrat Lifshitz, Shlomo Magdassi |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Fabrication Absorption spectroscopy Infrared chemistry.chemical_element 02 engineering and technology Carbon nanotube 01 natural sciences law.invention Condensed Matter::Materials Science Responsivity law 0103 physical sciences Electrical and Electronic Engineering Instrumentation 010302 applied physics business.industry Detector Metals and Alloys 021001 nanoscience & nanotechnology Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry Quantum dot Optoelectronics 0210 nano-technology business Carbon |
| Zdroj: | Sensors and Actuators A: Physical. 295:469-473 |
| ISSN: | 0924-4247 |
| DOI: | 10.1016/j.sna.2019.06.039 |
| Popis: | Over the last two decades, carbon based materials and especially carbon nanotubes (CNTs), were the subject of many studies, mainly due to their unique electrical, optical and mechanical properties (Ouyang et al., 2002; Dresselhaus et al., 2003; Dresselhaus et al., 1995). CNTs can combine electrical conductivity with wide absorption spectra, and can be produced in large scale (Danafar et al., 2009) [ 4 ]. These properties enable to realize CNTs in simple, low-cost detector. Here we present a proof-of-concept for such a detector operating at the short-wave infrared (SWIR) regime. We use a simple spray technique, which allows creating a large matrix of CNT bundles. Semiconducting quantum dots (QDs) were adsorbed on top of the CNTs, enhancing the sensitivity to the infrared regime. This regime is important for numerous applications in the civil, medical, defense and security fields. Controlled coupling between the QDs and the CNT matrix generates gate-like electro-optical response when light is absorbed. This proof-of-concept for a detector in the SWIR region is presented for large surfaces and substrates, while the responsivity and detectivity of the detector in a range of frequencies and wavelengths was evaluated. |
| Databáze: | OpenAIRE |
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