Fabrication and characterization of quantum-confined optoelectronic devices based on CdSe nanocrystals
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2002.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2005
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| Online Access: | http://hdl.handle.net/1721.1/8176 |
| _version_ | 1826190045745250304 |
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| author | Woo, Wing-Keung, 1972- |
| author2 | Moungi G. Bawendi. |
| author_facet | Moungi G. Bawendi. Woo, Wing-Keung, 1972- |
| author_sort | Woo, Wing-Keung, 1972- |
| collection | MIT |
| description | Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2002. |
| first_indexed | 2024-09-23T08:34:11Z |
| format | Thesis |
| id | mit-1721.1/8176 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T08:34:11Z |
| publishDate | 2005 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/81762022-01-13T07:54:21Z Fabrication and characterization of quantum-confined optoelectronic devices based on CdSe nanocrystals Woo, Wing-Keung, 1972- Moungi G. Bawendi. Massachusetts Institute of Technology. Dept. of Chemistry. Massachusetts Institute of Technology. Department of Chemistry Chemistry. Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2002. Includes bibliographical references. Colloidal semiconductor quantum dots (QDs), or nanocrystals (NCs), are the subject of intense research for their novel size dependent optical and electronic properties. Since the development of synthetic methods to produce cadmium selenide (CdSe) QDs with very controlled size-distributions and high crystalline quality, their potential applications in a variety of fields are being extensively explored. In this thesis, I present a simple chemical approach to greatly enhance not only the quantum yields of the CdSe and (CdSe)ZnS NCs, but also their viability in commercial applications such as LEDs, optoelectronics and biological tagging. Then I will describe our recent success in fabricating a solid-state NC capacitor. We can inject charges into these NCs with this device structure and control their fluorescence and absorption behavior. A green emitting LED with the CdSe NCs as the emissive material and a semiconducting polymer as the hole transport material is studied next. This is the first working device from which green electroluminescence of CdSe NCs is observed. Finally, I will describe results on the first efficient hybrid molecular organics/NCs LED. This device is a double heterojunction structure with a single monolayer of NCs sandwiched between 2 different molecular organics. This new device structure exhibits the highest reported quantum efficiency of 0.4%. by Wing-Keung Woo. Ph.D. 2005-08-24T20:59:25Z 2005-08-24T20:59:25Z 2002 2002 Thesis http://hdl.handle.net/1721.1/8176 51954706 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 101 p. 6098523 bytes 6098279 bytes application/pdf application/pdf application/pdf Massachusetts Institute of Technology |
| spellingShingle | Chemistry. Woo, Wing-Keung, 1972- Fabrication and characterization of quantum-confined optoelectronic devices based on CdSe nanocrystals |
| title | Fabrication and characterization of quantum-confined optoelectronic devices based on CdSe nanocrystals |
| title_full | Fabrication and characterization of quantum-confined optoelectronic devices based on CdSe nanocrystals |
| title_fullStr | Fabrication and characterization of quantum-confined optoelectronic devices based on CdSe nanocrystals |
| title_full_unstemmed | Fabrication and characterization of quantum-confined optoelectronic devices based on CdSe nanocrystals |
| title_short | Fabrication and characterization of quantum-confined optoelectronic devices based on CdSe nanocrystals |
| title_sort | fabrication and characterization of quantum confined optoelectronic devices based on cdse nanocrystals |
| topic | Chemistry. |
| url | http://hdl.handle.net/1721.1/8176 |
| work_keys_str_mv | AT woowingkeung1972 fabricationandcharacterizationofquantumconfinedoptoelectronicdevicesbasedoncdsenanocrystals |