Investigation of sub-bandgap absorption in iron pyrite : optical and electrical measurements
Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014.
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| Other Authors: | |
| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2014
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| Online Access: | http://hdl.handle.net/1721.1/87956 |
| _version_ | 1811097005646151680 |
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| author | Chakraborty, Rupak |
| author2 | Tonio Buonassisi. |
| author_facet | Tonio Buonassisi. Chakraborty, Rupak |
| author_sort | Chakraborty, Rupak |
| collection | MIT |
| description | Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014. |
| first_indexed | 2024-09-23T16:52:50Z |
| format | Thesis |
| id | mit-1721.1/87956 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T16:52:50Z |
| publishDate | 2014 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/879562019-04-12T11:10:31Z Investigation of sub-bandgap absorption in iron pyrite : optical and electrical measurements Chakraborty, Rupak Tonio Buonassisi. Massachusetts Institute of Technology. Department of Mechanical Engineering. Massachusetts Institute of Technology. Department of Mechanical Engineering. Mechanical Engineering. Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014. Cataloged from PDF version of thesis. Includes bibliographical references (pages 67-70). We investigate sub-bandgap absorption in pyrite FeS₂ single-crystals, using both natural and synthetic crystals. Both types of crystals show non-negligible magnitudes of sub-bandgap absorption. To test whether the origin of the residual sub-bandgap absorption is partially due to a lower bulk bandgap than previously thought, we conduct temperature-dependent electrical measurements on natural and synthetic crystals. Unlike previous measurements on pyrite, our electrical measurements are done in a sulfur atmosphere to avoid FeS formation. Using conductivity data in the intrinsic regime along with extrapolated Hall mobility data, the extracted bandgap is more than 0.1 eV lower than the literature value of 0.95 eV. However, higher-temperature Hall data are needed to gain a more reliable bandgap estimate. by Rupak Chakraborty. S.M. 2014-06-13T22:36:16Z 2014-06-13T22:36:16Z 2014 2014 Thesis http://hdl.handle.net/1721.1/87956 880676056 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 70 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Mechanical Engineering. Chakraborty, Rupak Investigation of sub-bandgap absorption in iron pyrite : optical and electrical measurements |
| title | Investigation of sub-bandgap absorption in iron pyrite : optical and electrical measurements |
| title_full | Investigation of sub-bandgap absorption in iron pyrite : optical and electrical measurements |
| title_fullStr | Investigation of sub-bandgap absorption in iron pyrite : optical and electrical measurements |
| title_full_unstemmed | Investigation of sub-bandgap absorption in iron pyrite : optical and electrical measurements |
| title_short | Investigation of sub-bandgap absorption in iron pyrite : optical and electrical measurements |
| title_sort | investigation of sub bandgap absorption in iron pyrite optical and electrical measurements |
| topic | Mechanical Engineering. |
| url | http://hdl.handle.net/1721.1/87956 |
| work_keys_str_mv | AT chakrabortyrupak investigationofsubbandgapabsorptioninironpyriteopticalandelectricalmeasurements |