Study of field driven electroluminescence in colloidal quantum dot solids
Semiconductor nanocrystals, or quantum dots(QDs), promise to drive advances in electronic light generation. It was recently shown that long range transport of charge, which is typically required for electric excitation and which is inherently limited in nanosized materials, can be avoided by develop...
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| Format: | Article |
| Language: | en_US |
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American Institute of Physics (AIP)
2014
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| Online Access: | http://hdl.handle.net/1721.1/86048 https://orcid.org/0000-0002-0960-2580 |
| _version_ | 1811087671421829120 |
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| author | Bozyigit, Deniz Wood, Vanessa Shirasaki, Yasuhiro Bulovic, Vladimir |
| author2 | Massachusetts Institute of Technology. Research Laboratory of Electronics |
| author_facet | Massachusetts Institute of Technology. Research Laboratory of Electronics Bozyigit, Deniz Wood, Vanessa Shirasaki, Yasuhiro Bulovic, Vladimir |
| author_sort | Bozyigit, Deniz |
| collection | MIT |
| description | Semiconductor nanocrystals, or quantum dots(QDs), promise to drive advances in electronic light generation. It was recently shown that long range transport of charge, which is typically required for electric excitation and which is inherently limited in nanosized materials, can be avoided by developing devices that operate through local, field-assisted generation of charge. We investigate such devices that consist of a thin film of CdSe/ZnS core-shell QD placed between two dielectric layers and that exhibit electroluminescence under pulsed, high field excitation. Using electrical and spectroscopic measurements, we are able to elucidate the dynamics of charge within the QD layer and determine that charge trapping and field-induced luminescence quenching are the main limitations of device performance. |
| first_indexed | 2024-09-23T13:50:10Z |
| format | Article |
| id | mit-1721.1/86048 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:50:10Z |
| publishDate | 2014 |
| publisher | American Institute of Physics (AIP) |
| record_format | dspace |
| spelling | mit-1721.1/860482022-10-01T17:25:40Z Study of field driven electroluminescence in colloidal quantum dot solids Bozyigit, Deniz Wood, Vanessa Shirasaki, Yasuhiro Bulovic, Vladimir Massachusetts Institute of Technology. Research Laboratory of Electronics Massachusetts Institute of Technology. School of Engineering Shirasaki, Yasuhiro Bulovic, Vladimir Semiconductor nanocrystals, or quantum dots(QDs), promise to drive advances in electronic light generation. It was recently shown that long range transport of charge, which is typically required for electric excitation and which is inherently limited in nanosized materials, can be avoided by developing devices that operate through local, field-assisted generation of charge. We investigate such devices that consist of a thin film of CdSe/ZnS core-shell QD placed between two dielectric layers and that exhibit electroluminescence under pulsed, high field excitation. Using electrical and spectroscopic measurements, we are able to elucidate the dynamics of charge within the QD layer and determine that charge trapping and field-induced luminescence quenching are the main limitations of device performance. Massachusetts Institute of Technology. Energy Frontier Research Center for Excitonics United States. Dept. of Energy. Center for Excitonics (Award DE-SC0001088) National Science Foundation (U.S.) 2014-04-07T13:57:14Z 2014-04-07T13:57:14Z 2012-06 2011-11 Article http://purl.org/eprint/type/JournalArticle 00218979 1089-7550 http://hdl.handle.net/1721.1/86048 Bozyigit, Deniz, Vanessa Wood, Yasuhiro Shirasaki, and Vladimir Bulovic. “Study of Field Driven Electroluminescence in Colloidal Quantum Dot Solids.” Journal of Applied Physics 111, no. 11 (2012): 113701. © 2012 American Institute of Physics https://orcid.org/0000-0002-0960-2580 en_US http://dx.doi.org/10.1063/1.4720377 Journal of Applied Physics Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Institute of Physics (AIP) MIT web domain |
| spellingShingle | Bozyigit, Deniz Wood, Vanessa Shirasaki, Yasuhiro Bulovic, Vladimir Study of field driven electroluminescence in colloidal quantum dot solids |
| title | Study of field driven electroluminescence in colloidal quantum dot solids |
| title_full | Study of field driven electroluminescence in colloidal quantum dot solids |
| title_fullStr | Study of field driven electroluminescence in colloidal quantum dot solids |
| title_full_unstemmed | Study of field driven electroluminescence in colloidal quantum dot solids |
| title_short | Study of field driven electroluminescence in colloidal quantum dot solids |
| title_sort | study of field driven electroluminescence in colloidal quantum dot solids |
| url | http://hdl.handle.net/1721.1/86048 https://orcid.org/0000-0002-0960-2580 |
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