Fast and Efficient Photodetection in Nanoscale Quantum-Dot Junctions
We report on a photodetector in which colloidal quantum dots directly bridge nanometer-spaced electrodes. Unlike in conventional quantum-dot thin film photodetectors, charge mobility no longer plays a role in our quantum-dot junctions as charge extraction requires only two individual tunnel events....
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| Veröffentlicht in: | Nano letters 2012-11, Vol.12 (11), p.5740-5743 |
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| container_issue | 11 |
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| container_title | Nano letters |
| container_volume | 12 |
| creator | Prins, Ferry Buscema, Michele Seldenthuis, Johannes S Etaki, Samir Buchs, Gilles Barkelid, Maria Zwiller, Val Gao, Yunan Houtepen, Arjan J Siebbeles, Laurens D. A van der Zant, Herre S. J |
| description | We report on a photodetector in which colloidal quantum dots directly bridge nanometer-spaced electrodes. Unlike in conventional quantum-dot thin film photodetectors, charge mobility no longer plays a role in our quantum-dot junctions as charge extraction requires only two individual tunnel events. We find an efficient photoconductive gain mechanism with external quantum efficiencies of 38 electrons-per-photon in combination with response times faster than 300 ns. This compact device-architecture may open up new routes for improved photodetector performance in which efficiency and bandwidth do not go at the cost of one another. |
| doi_str_mv | 10.1021/nl303008y |
| format | Article |
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This compact device-architecture may open up new routes for improved photodetector performance in which efficiency and bandwidth do not go at the cost of one another.</description><identifier>ISSN: 1530-6984</identifier><identifier>EISSN: 1530-6992</identifier><identifier>DOI: 10.1021/nl303008y</identifier><identifier>PMID: 23094869</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Applied sciences ; Bridges (structures) ; Charge ; Colloids - chemistry ; Condensed matter: structure, mechanical and thermal properties ; Cross-disciplinary physics: materials science; rheology ; Electrodes ; Electronics ; Electrons ; Exact sciences and technology ; Extraction ; Gain ; Light ; Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties ; Materials science ; Microscopy, Confocal - methods ; Molecular electronics, nanoelectronics ; Nanocrystalline materials ; Nanoscale materials and structures: fabrication and characterization ; Nanostructure ; Nanotechnology - methods ; Optics and Photonics ; Photochemistry - methods ; Photodetectors ; Physics ; Quantum Dots ; Semiconductor electronics. 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A</creatorcontrib><creatorcontrib>van der Zant, Herre S. J</creatorcontrib><title>Fast and Efficient Photodetection in Nanoscale Quantum-Dot Junctions</title><title>Nano letters</title><addtitle>Nano Lett</addtitle><description>We report on a photodetector in which colloidal quantum dots directly bridge nanometer-spaced electrodes. Unlike in conventional quantum-dot thin film photodetectors, charge mobility no longer plays a role in our quantum-dot junctions as charge extraction requires only two individual tunnel events. We find an efficient photoconductive gain mechanism with external quantum efficiencies of 38 electrons-per-photon in combination with response times faster than 300 ns. 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Solid state devices</subject><subject>Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties)</subject><subject>Thin films</subject><subject>Time Factors</subject><issn>1530-6984</issn><issn>1530-6992</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqF0DlPwzAUwHELgWg5Br4AyoIEQ8BXfIyoB4cqDgnmyHFskSqxS-wM_fakNJQFiclv-Ok96w_AGYLXCGJ042oCCYRivQfGKCMwZVLi_d0s6AgchbCEEEqSwUMwwgRKKpgcg-lchZgoVyYzaytdGReTlw8ffWmi0bHyLqlc8qScD1rVJnntlItdk059TB479y3CCTiwqg7mdHiPwft89ja5TxfPdw-T20WqKCIx5YZiTLVlCCrCMlwQJBCVAnMmC1pIaSxVmVSaWG6sIaSU_ahLKDTnVpTkGFxu965a_9mZEPOmCtrUtXLGdyFHnGGYIcHY_xTx3nEpZE-vtlS3PoTW2HzVVo1q1zmC-aZvvuvb2_NhbVc0ptzJn6A9uBiA2gSzrXK6Cr-OMZht_zc4pUO-9F3r-nB_HPwCNAeNJg</recordid><startdate>20121114</startdate><enddate>20121114</enddate><creator>Prins, Ferry</creator><creator>Buscema, Michele</creator><creator>Seldenthuis, Johannes S</creator><creator>Etaki, Samir</creator><creator>Buchs, Gilles</creator><creator>Barkelid, Maria</creator><creator>Zwiller, Val</creator><creator>Gao, Yunan</creator><creator>Houtepen, Arjan J</creator><creator>Siebbeles, Laurens D. 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| subjects | Applied sciences Bridges (structures) Charge Colloids - chemistry Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Electrodes Electronics Electrons Exact sciences and technology Extraction Gain Light Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties Materials science Microscopy, Confocal - methods Molecular electronics, nanoelectronics Nanocrystalline materials Nanoscale materials and structures: fabrication and characterization Nanostructure Nanotechnology - methods Optics and Photonics Photochemistry - methods Photodetectors Physics Quantum Dots Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties) Thin films Time Factors |
| title | Fast and Efficient Photodetection in Nanoscale Quantum-Dot Junctions |
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