Design and synthesis of nanocrystal heterostructures for optoelectronic applications
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2008.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2008
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| Online Access: | http://hdl.handle.net/1721.1/43764 |
| _version_ | 1811085137958404096 |
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| author | Halpert, Jonathan E |
| author2 | Moungi G. Bawendi. |
| author_facet | Moungi G. Bawendi. Halpert, Jonathan E |
| author_sort | Halpert, Jonathan E |
| collection | MIT |
| description | Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2008. |
| first_indexed | 2024-09-23T13:03:30Z |
| format | Thesis |
| id | mit-1721.1/43764 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T13:03:30Z |
| publishDate | 2008 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/437642019-04-12T14:32:21Z Design and synthesis of nanocrystal heterostructures for optoelectronic applications Halpert, Jonathan E Moungi G. Bawendi. Massachusetts Institute of Technology. Dept. of Chemistry. Massachusetts Institute of Technology. Dept. of Chemistry. Chemistry. Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2008. Vita. Includes bibliographical references. Colloidal semiconductor nanocrystals can be used for a variety of optoelectronic applications including light emitting devices (LEDs) and photovoltaics. Their narrow emission spectra make them excellent fluorophors for use in red, green and blue emitting organic LEDs and have been shown to achieve external quantum efficiencies as high as 2.7%, 1.8% and 0.4% respectively. Better synthetic methods have produced nanocrystal emitters with higher quantum yield, boosting efficiency, while a better understanding of QD-OLED function has led to improved organic transport materials. These QD-OLED devices can also be redesigned using inorganic hole and electron transport materials to produce inorganic QD-LEDs (QD-ILEDs) with EQE as high as 0.1%. Inorganic transport layers are more robust to solvents and oxygen, and are expected to greatly increase the device lifetime of QD-LEDs over devices employing organic materials. New QD deposition techniques using an inorganic hole transport layer include inkjet printing and Langmuir-Shaeffer dip-coating. Greater synthetic control of the II-VI nanocrystals has also yielded type-II CdSe/CdTe nanobarbells capable of internal exciton separation for photovoltaic applications. Although efficient solar cells using this material could not be produced, the material has given us several insights into the physics and future designs of bulk heterojunction photovoltaic devices. Finally, nanocrystal heterostructures formed using J-aggregate dyes electrostatically bound to QDs, have shown potential for use in LCD or lasing device applications. by Jonathan E. Halpert Ph.D. 2008-12-11T18:23:40Z 2008-12-11T18:23:40Z 2008 2008 Thesis http://hdl.handle.net/1721.1/43764 260052074 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 251 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Chemistry. Halpert, Jonathan E Design and synthesis of nanocrystal heterostructures for optoelectronic applications |
| title | Design and synthesis of nanocrystal heterostructures for optoelectronic applications |
| title_full | Design and synthesis of nanocrystal heterostructures for optoelectronic applications |
| title_fullStr | Design and synthesis of nanocrystal heterostructures for optoelectronic applications |
| title_full_unstemmed | Design and synthesis of nanocrystal heterostructures for optoelectronic applications |
| title_short | Design and synthesis of nanocrystal heterostructures for optoelectronic applications |
| title_sort | design and synthesis of nanocrystal heterostructures for optoelectronic applications |
| topic | Chemistry. |
| url | http://hdl.handle.net/1721.1/43764 |
| work_keys_str_mv | AT halpertjonathane designandsynthesisofnanocrystalheterostructuresforoptoelectronicapplications |