DC Field | Value | Language |
---|---|---|
dc.contributor.author | Cao, Thanh Ha | - |
dc.date.accessioned | 2018-10-17T05:09:57Z | - |
dc.date.available | 2018-10-17T05:09:57Z | - |
dc.date.issued | 2015 | - |
dc.identifier.other | OAK-2015-06863 | - |
dc.identifier.uri | http://postech.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000001910797 | ko_KR |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/93020 | - |
dc.description | Master | - |
dc.description.abstract | Colloidal quantum dots (QDs) prepared by chemical routes have bright and narrow bandwidth luminescence. Furthermore, it is easy to engineer the surfaces of colloidal QDs by fabricating core/shell structures to enhance emission efficiency. PbS QDs have large Bohr radius ~ 18nm which provides strong confinement effect. In addition PbS semiconductor has a bulk bandgap of 0.41 eV. As a result PbS QDs possess bright and stable emission in near-infrared region (NIR). Emission efficiency of PbS QDs can also be improved by fabricating PbS/CdS core/shell QDs. Chalcogenide glasses are transparent to near-infrared up to mid-infrared light. Arsenic trisulfide (As2S3) glasses have high refractive index, high non-linear optical properties, low melting point and are easy to form fibers. It appears that chalcogenide glasses can provide excellent host matrices for IR-emitting QDs such as PbS QDs and PbS/CdS core/shell QDs. In this work, PbS QDs and PbS/CdS core/shell QDs were integrated into As2S3 glasses to obtain composites in bulk forms. We investigated photoluminescence of PbS QDs and PbS/CdS core/shell QDs in those composites. Compared to bare PbS QDs only, PbS/CdS core/shell QDs demonstrate enhancement in photoluminescence efficiency. | - |
dc.language | eng | - |
dc.publisher | 포항공과대학교 | - |
dc.title | Photoluminescence from PbS QDs and PbS/CdS core/shell QDs Mixed with As2S3 glass | - |
dc.type | Thesis | - |
dc.contributor.college | 일반대학원 신소재공학과 | - |
dc.date.degree | 2015- 2 | - |
dc.type.docType | Thesis | - |
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