Crystals 2014, 4(2), 152-167; doi:10.3390/cryst4020152
Article

Electric Field Effects on Photoluminescence of CdSe Nanoparticles in a PMMA Film

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Received: 8 April 2014; in revised form: 4 June 2014 / Accepted: 6 June 2014 / Published: 23 June 2014
(This article belongs to the Special Issue Semiconductor Nanocrystals)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: External electric field effects on spectra and decay of photoluminescence (PL) as well as on absorption spectra were measured for CdSe nanoparticles in a poly(methyl methacrylate) (PMMA) film. Electrophotoluminescence (E-PL) spectra as well as electroabsorption spectra show a remarkable Stark shift which depends on the particle size, indicating a large electric dipole moment in the first exciton state. The E-PL spectra also show that PL of CdSe is quenched by application of electric fields, and the magnitude of the field-induced quenching becomes larger with increasing size. The PL decay profiles observed in the absence and presence of electric field show that the field-induced quenching of PL mainly originates from the field-induced decrease in population of the emitting state prepared through the relaxation from the photoexcited state.
Keywords: CdSe; electric field effects; photoluminescence; field-induced quenching
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MDPI and ACS Style

Nakabayashi, T.; Ohshima, R.; Ohta, N. Electric Field Effects on Photoluminescence of CdSe Nanoparticles in a PMMA Film. Crystals 2014, 4, 152-167.

AMA Style

Nakabayashi T, Ohshima R, Ohta N. Electric Field Effects on Photoluminescence of CdSe Nanoparticles in a PMMA Film. Crystals. 2014; 4(2):152-167.

Chicago/Turabian Style

Nakabayashi, Takakazu; Ohshima, Ruriko; Ohta, Nobuhiro. 2014. "Electric Field Effects on Photoluminescence of CdSe Nanoparticles in a PMMA Film." Crystals 4, no. 2: 152-167.

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