Heat treatment effect on performance of printed ZnO UV photodetector
The use of additive manufacturing has been on the rise. One of which is the usage of Inkjet-printing. The main objective of this project was to use all-inkjet printing method to make a photodetector using ZnO and to study the annealing effects to ZnO photodetector performance. After printing the ZnO...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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2018
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| Online Access: | http://hdl.handle.net/10356/74558 |
| _version_ | 1811681796378591232 |
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| author | Koh, Edmund Jun Guo |
| author2 | Du Hejun |
| author_facet | Du Hejun Koh, Edmund Jun Guo |
| author_sort | Koh, Edmund Jun Guo |
| collection | NTU |
| description | The use of additive manufacturing has been on the rise. One of which is the usage of Inkjet-printing. The main objective of this project was to use all-inkjet printing method to make a photodetector using ZnO and to study the annealing effects to ZnO photodetector performance. After printing the ZnO on the substrate, annealing needs to be done for the photodetector to be ready for use. Before annealing, the unannealed sample required a rise time of Tr1=2.31893 s and the annealed sample required a rise time of Tr1=12.95526 s. From the readings of the photocurrent, the magnitude of the photocurrent for the unannealed sample was lower than the annealed sample by one order of magnitude. This was due to the lowering of the band bending level which allowed the electrons to move in and out of the grain boundaries easily as compared to before annealing, hence able to capture higher readings of UV light. |
| first_indexed | 2024-10-01T03:46:38Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/74558 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:46:38Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/745582023-03-04T18:20:38Z Heat treatment effect on performance of printed ZnO UV photodetector Koh, Edmund Jun Guo Du Hejun School of Mechanical and Aerospace Engineering Centre for Mechanics of Micro-Systems DRNTU::Engineering::Nanotechnology The use of additive manufacturing has been on the rise. One of which is the usage of Inkjet-printing. The main objective of this project was to use all-inkjet printing method to make a photodetector using ZnO and to study the annealing effects to ZnO photodetector performance. After printing the ZnO on the substrate, annealing needs to be done for the photodetector to be ready for use. Before annealing, the unannealed sample required a rise time of Tr1=2.31893 s and the annealed sample required a rise time of Tr1=12.95526 s. From the readings of the photocurrent, the magnitude of the photocurrent for the unannealed sample was lower than the annealed sample by one order of magnitude. This was due to the lowering of the band bending level which allowed the electrons to move in and out of the grain boundaries easily as compared to before annealing, hence able to capture higher readings of UV light. Bachelor of Engineering (Mechanical Engineering) 2018-05-21T07:54:03Z 2018-05-21T07:54:03Z 2018 Final Year Project (FYP) http://hdl.handle.net/10356/74558 en Nanyang Technological University 51 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Nanotechnology Koh, Edmund Jun Guo Heat treatment effect on performance of printed ZnO UV photodetector |
| title | Heat treatment effect on performance of printed ZnO UV photodetector |
| title_full | Heat treatment effect on performance of printed ZnO UV photodetector |
| title_fullStr | Heat treatment effect on performance of printed ZnO UV photodetector |
| title_full_unstemmed | Heat treatment effect on performance of printed ZnO UV photodetector |
| title_short | Heat treatment effect on performance of printed ZnO UV photodetector |
| title_sort | heat treatment effect on performance of printed zno uv photodetector |
| topic | DRNTU::Engineering::Nanotechnology |
| url | http://hdl.handle.net/10356/74558 |
| work_keys_str_mv | AT kohedmundjunguo heattreatmenteffectonperformanceofprintedznouvphotodetector |