dc.citation.conferencePlace |
US |
- |
dc.citation.title |
MRS 2023 fall meeting & Exhibit |
- |
dc.contributor.author |
Lee, Jungtaek |
- |
dc.contributor.author |
Choi, Deokjae |
- |
dc.contributor.author |
Seo, Kwanyong |
- |
dc.date.accessioned |
2023-12-21T16:05:13Z |
- |
dc.date.available |
2023-12-21T16:05:13Z |
- |
dc.date.created |
2023-12-21 |
- |
dc.date.issued |
2023-11-27 |
- |
dc.description.abstract |
Crystalline silicon nanowires (c-SiNWs) have unique optical characteristics that enable tuning of their spectral response depending on their diameter. However, real-world applications of c-SiNWs multispectral photodetectors are still hampered by their low selectivity and low quantum efficiency (< 30%). The primary obstacles include the broad-spectrum light absorption of the bottom crystalline silicon (c-Si) substrate underneath the c-SiNWs. In addition, it is difficult to form appropriate p-n junctions on c-SiNWs and it leads to severe recombination which makes low external quantum efficiency (EQE). In this study, a thin metal film was applied as an optical blocking layer to block light absorption in the bottom c-Si substrate, and atomic layer deposition (ALD)-based Al2O3 was employed to form a dopant-free p-n junction on diameter-controlled c-SiNWs. Consequently, the maximum EQE of the fabricated photodetector was 77.4% at 620 nm with remarkable wavelength selectivity. This work removes major stumbling blocks for the use of c-SiNW as selective light spectral bandpass photodetectors. Keywords |
- |
dc.identifier.bibliographicCitation |
MRS 2023 fall meeting & Exhibit |
- |
dc.identifier.uri |
https://scholarworks.unist.ac.kr/handle/201301/66732 |
- |
dc.identifier.url |
https://www.mrs.org/meetings-events/presentation/2023_mrs_fall_meeting/2023_mrs_fall_meeting-3950492 |
- |
dc.publisher |
Materials research society |
- |
dc.title |
Optical Blocking Layer and Field-induced Junction on Silicon Nanowire Multispectral Photodetectors Toward High Quantum Efficiency |
- |
dc.type |
Conference Paper |
- |
dc.date.conferenceDate |
2023-11-26 |
- |