Chemical vapour deposition synthesis of ultrathin CdTe nanosheet for high performing photodetectors
Since the discovery two-dimensional transitional metal dichalcogenides (2D TMDCs), realization techniques of 2D non-layered structure has been highly sort after for its unique physical properties, high flexibility and strong compatibility with silicon substrates [1]. However, realization technique s...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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Nanyang Technological University
2020
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| Online Access: | https://hdl.handle.net/10356/138834 |
| _version_ | 1826125791217319936 |
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| author | Lim, Merryl Si Ying |
| author2 | Liu Zheng |
| author_facet | Liu Zheng Lim, Merryl Si Ying |
| author_sort | Lim, Merryl Si Ying |
| collection | NTU |
| description | Since the discovery two-dimensional transitional metal dichalcogenides (2D TMDCs), realization techniques of 2D non-layered structure has been highly sort after for its unique physical properties, high flexibility and strong compatibility with silicon substrates [1]. However, realization technique still poses a great challenge as a wurtzite crystal structure in CdTe hinders anisotropic growth. In this study, we demonstrated the controlled synthesis of 2D hexagonal CdTe crystals by exploring the growth parameters through van der Waals epitaxy growth method to obtain uniform thickness and large lateral dimension of crystal. Besides, the optoelectronic properties of CdTe nanosheet was explored for its use as photodetector through various characterisation techniques. The CdTe nanosheet as shown to possess high detectivity, stable photoswitching and ultrafast photoresponse. |
| first_indexed | 2024-10-01T06:42:28Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/138834 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:42:28Z |
| publishDate | 2020 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1388342023-03-04T15:47:20Z Chemical vapour deposition synthesis of ultrathin CdTe nanosheet for high performing photodetectors Lim, Merryl Si Ying Liu Zheng School of Materials Science and Engineering z.liu@ntu.edu.sg Engineering::Materials Since the discovery two-dimensional transitional metal dichalcogenides (2D TMDCs), realization techniques of 2D non-layered structure has been highly sort after for its unique physical properties, high flexibility and strong compatibility with silicon substrates [1]. However, realization technique still poses a great challenge as a wurtzite crystal structure in CdTe hinders anisotropic growth. In this study, we demonstrated the controlled synthesis of 2D hexagonal CdTe crystals by exploring the growth parameters through van der Waals epitaxy growth method to obtain uniform thickness and large lateral dimension of crystal. Besides, the optoelectronic properties of CdTe nanosheet was explored for its use as photodetector through various characterisation techniques. The CdTe nanosheet as shown to possess high detectivity, stable photoswitching and ultrafast photoresponse. Bachelor of Engineering (Materials Engineering) 2020-05-13T05:00:56Z 2020-05-13T05:00:56Z 2020 Final Year Project (FYP) https://hdl.handle.net/10356/138834 en application/pdf Nanyang Technological University |
| spellingShingle | Engineering::Materials Lim, Merryl Si Ying Chemical vapour deposition synthesis of ultrathin CdTe nanosheet for high performing photodetectors |
| title | Chemical vapour deposition synthesis of ultrathin CdTe nanosheet for high performing photodetectors |
| title_full | Chemical vapour deposition synthesis of ultrathin CdTe nanosheet for high performing photodetectors |
| title_fullStr | Chemical vapour deposition synthesis of ultrathin CdTe nanosheet for high performing photodetectors |
| title_full_unstemmed | Chemical vapour deposition synthesis of ultrathin CdTe nanosheet for high performing photodetectors |
| title_short | Chemical vapour deposition synthesis of ultrathin CdTe nanosheet for high performing photodetectors |
| title_sort | chemical vapour deposition synthesis of ultrathin cdte nanosheet for high performing photodetectors |
| topic | Engineering::Materials |
| url | https://hdl.handle.net/10356/138834 |
| work_keys_str_mv | AT limmerrylsiying chemicalvapourdepositionsynthesisofultrathincdtenanosheetforhighperformingphotodetectors |