Colloidal HgTe Quantum Dot/Graphene Phototransistor with a Spectral Sensitivity Beyond 3 µm.
| Autor: | Grotevent MJ; Department of Chemistry and Applied Biosciences ETH Zurich Vladimir Prelog Weg 1 Zurich CH-8093 Switzerland.; Laboratory for Transport at Nanoscale Interfaces Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 Dübendorf CH-8600 Switzerland., Hail CU; Department of Mechanical and Process Engineering ETH Zurich Sonneggstrasse 3 Zurich CH-8092 Switzerland., Yakunin S; Department of Chemistry and Applied Biosciences ETH Zurich Vladimir Prelog Weg 1 Zurich CH-8093 Switzerland.; Laboratory for Thin Films and Photovoltaics Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 Dübendorf CH-8600 Switzerland., Bachmann D; Laboratory for Transport at Nanoscale Interfaces Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 Dübendorf CH-8600 Switzerland., Calame M; Laboratory for Transport at Nanoscale Interfaces Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 Dübendorf CH-8600 Switzerland.; Department of Physics University of Basel Klingelbergstrasse 82 Basel CH-4056 Switzerland., Poulikakos D; Department of Mechanical and Process Engineering ETH Zurich Sonneggstrasse 3 Zurich CH-8092 Switzerland., Kovalenko MV; Department of Chemistry and Applied Biosciences ETH Zurich Vladimir Prelog Weg 1 Zurich CH-8093 Switzerland.; Laboratory for Thin Films and Photovoltaics Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 Dübendorf CH-8600 Switzerland., Shorubalko I; Laboratory for Transport at Nanoscale Interfaces Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 Dübendorf CH-8600 Switzerland. |
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| Jazyk: | angličtina |
| Zdroj: | Advanced science (Weinheim, Baden-Wurttemberg, Germany) [Adv Sci (Weinh)] 2021 Feb 01; Vol. 8 (6), pp. 2003360. Date of Electronic Publication: 2021 Feb 01 (Print Publication: 2021). |
| DOI: | 10.1002/advs.202003360 |
| Abstrakt: | Infrared light detection enables diverse technologies ranging from night vision to gas analysis. Emerging technologies such as low-cost cameras for self-driving cars require highly sensitive, low-cost photodetector cameras with spectral sensitivities up to wavelengths of 10 µm. For this purpose, colloidal quantum dot (QD) graphene phototransistors offer a viable alternative to traditional technologies owing to inexpensive synthesis and processing of QDs. However, the spectral range of QD/graphene phototransistors is thus far limited to 1.6 µm. Here, HgTe QD/graphene phototransistors with spectral sensitivity up to 3 µm are presented, with specific detectivities of 6 × 10 8 Jones at a wavelength of 2.5 µm and a temperature of 80 K. Even at kHz light modulation frequencies, specific detectivities exceed 10 8 Jones making them suitable for fast video imaging. The simple device architecture and QD film patterning in combination with a broad spectral sensitivity manifest an important step toward low-cost, multi-color infrared cameras. Competing Interests: The authors declare no conflict of interest. (© 2021 The Authors. Advanced Science published by Wiley‐VCH GmbH.) |
| Databáze: | MEDLINE |
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