Temperature dependent photoluminescence from lead sulfide nanosheets and nanocubes

Title
Temperature dependent photoluminescence from lead sulfide nanosheets and nanocubes
Authors
최원준김중동김승기오은순김상혁
Keywords
lead sulfide; photoluminescence; nanosheets and nanocubes
Issue Date
2015-12
Publisher
Nanotechnology
Citation
VOL 27, NO 4, 1-6
Abstract
We studied temperature dependent photoluminescence (PL) spectra in the mid-infrared range from lead sulfide (PbS) nanosheets with an average thickness of 25 nm and nanocubes grown by solvothermal and hydrothermal methods. Distinct bandedge PL emission was observed in the whole temperature range between 10 and 300 K, indicating the high optical quality of these nanostructures. The PL peak of the nanosheets was found at 0.326 eV at 10 K, about 40 meV higher than that of bulk PbS due to the quantum confinement effect, whereas no confinement effect was observed for the nanocubes. We also demonstrate that the absorption edges of the nanocubes and nanosheets in the transmission spectra agree very well with their fundamental bandgap.
URI
http://pubs.kist.re.kr/handle/201004/59425
ISSN
09574484
Appears in Collections:
KIST Publication > Article
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