Tuning the band gap of PbSe quantum dots in glasses by TiO doping
SCIE
SCOPUS
- Title
- Tuning the band gap of PbSe quantum dots in glasses by TiO doping
- Authors
- Tesfamariam, B.B; Wang, J; Liu, C; Heo, J.
- Date Issued
- 2016-11
- Publisher
- Springer Link
- Abstract
- Titanium monoxide (TiO) was added to host glass, which was heat-treated at 520 A degrees C for 10 h to incorporate Ti2+ into PbSe quantum dots (QDs) to control their band gaps. Incorporation of Ti2+ ions into PbSe QDs was confirmed using electron energy loss spectroscopy analysis. Addition of TiO caused blue-shift of the absorption and photoluminescence (PL) bands of the QDs. Absorption bands moved from 1621 nm at TiO concentration [TiO] = 0.0% to 1418 nm at [TiO] = 0.4 mol%. Average diameters of QDs remained mostly unaffected (i.e., 6.25 +/- 0.14 nm at [TiO] = 0.0% to 6.03 +/- 0.1 nm at [TiO] = 0.4 mol%). The changes in absorption and PL bands originated from the incorporation of Ti2+ ions into PbSe QDs. Band gaps of PbSe QDs increased from 0.76 eV at [TiO] = 0% to 0.88 eV at [TiO] = 0.4 mol%. This simple method to tune the band gap of PbSe QDs has possible applications in optical communication fiber amplifiers, infrared laser sources and saturable absorbers.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/36718
- DOI
- 10.1007/S10854-016-6023-Y
- ISSN
- 0957-4522
- Article Type
- Article
- Citation
- JOURNAL OF MATERIALS SCIENCE, page. 1 - 5, 2016-11
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- There are no files associated with this item.
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