Study on the photoelectric hot electrons generation and transport with metallic-semiconductor photonic crystals
Thesis: S.M., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2015.
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | eng |
| Published: |
Massachusetts Institute of Technology
2015
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/1721.1/98730 |
| _version_ | 1826199362175238144 |
|---|---|
| author | Wang, Yu |
| author2 | Sang Gook Kim. |
| author_facet | Sang Gook Kim. Wang, Yu |
| author_sort | Wang, Yu |
| collection | MIT |
| description | Thesis: S.M., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2015. |
| first_indexed | 2024-09-23T11:18:40Z |
| format | Thesis |
| id | mit-1721.1/98730 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T11:18:40Z |
| publishDate | 2015 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/987302019-04-11T13:32:03Z Study on the photoelectric hot electrons generation and transport with metallic-semiconductor photonic crystals Wang, Yu Sang Gook Kim. Massachusetts Institute of Technology. Department of Materials Science and Engineering. Massachusetts Institute of Technology. Department of Materials Science and Engineering. Materials Science and Engineering. Thesis: S.M., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2015. Cataloged from PDF version of thesis. Includes bibliographical references (pages 47-50). Photoelectric hot carrier generation in metal-semiconductor junctions allows for optical-to- electrical energy conversion at photon energies below the bandgap of the semiconductor. Which opens new opportunities in optical sensors and energy conversion devices. In this thesis research, the wafer-scale metallic-semiconductor photonic crystal (MSPhC) has been designed for photoelectric hot electrons collection. The periodic nano-cavities structure of MSPhC supports various optical modes that can resonate with light in broad wavelength region. Optical simulation and experimental results of MSPhC have been demonstrated. The simulation results shows MSPhC can achieve up to 70% absorption in the solar radiation range, with ultra-thin metal film. Experimentally, MSPhC has fabricated via 6" Si wafer scalable microfabrication techniques. A broadband sub-bandgap hot electron response with a full width at half maximum (FWHM) of 235 nm centered at 590 nm is observed. Photoresponse enhancement factor of 12.28 at 639 nm compared to a flat chip is also measured. Applications of these results could lead to low-cost and robust photoelectrochemical device such as full-spectrum solar water splitting. by Yu Wang. S.M. 2015-09-17T19:08:01Z 2015-09-17T19:08:01Z 2015 2015 Thesis http://hdl.handle.net/1721.1/98730 920874528 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 50 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Materials Science and Engineering. Wang, Yu Study on the photoelectric hot electrons generation and transport with metallic-semiconductor photonic crystals |
| title | Study on the photoelectric hot electrons generation and transport with metallic-semiconductor photonic crystals |
| title_full | Study on the photoelectric hot electrons generation and transport with metallic-semiconductor photonic crystals |
| title_fullStr | Study on the photoelectric hot electrons generation and transport with metallic-semiconductor photonic crystals |
| title_full_unstemmed | Study on the photoelectric hot electrons generation and transport with metallic-semiconductor photonic crystals |
| title_short | Study on the photoelectric hot electrons generation and transport with metallic-semiconductor photonic crystals |
| title_sort | study on the photoelectric hot electrons generation and transport with metallic semiconductor photonic crystals |
| topic | Materials Science and Engineering. |
| url | http://hdl.handle.net/1721.1/98730 |
| work_keys_str_mv | AT wangyu studyonthephotoelectrichotelectronsgenerationandtransportwithmetallicsemiconductorphotoniccrystals |