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Color-tunable mixed photoluminescence emission from Alq3 organic layer in metal-Alq3-metal surface plasmon structure.

Chen NC, Liao CC, Chen CC, Fan WT, Wu JH, Li JY, Chen SP, Huang BR, Lee LL - Nanoscale Res Lett (2014)

Bottom Line: The emission wavelength of the latter depends on the Alq3 thickness and can be tuned within the Alq3 fluorescent spectra.Therefore, a two-color broadband, color-tunable mixed PL structure was obtained.Obvious changes in the Commission Internationale d'Eclairage (CIE) coordinates and the corresponding emission colors of Au-Alq3-Au samples clearly varied with the Alq3 thickness (90, 130, and 156 nm).

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Electronic Engineering, Chang Gung University, Tao-Yuan 333, Taiwan ; Institute of Electro-Optical Engineering, Chang Gung University, Tao-Yuan 333, Taiwan.

ABSTRACT
This work reports the color-tunable mixed photoluminescence (PL) emission from an Alq3 organic layer in an Au-Alq3-Au plasmonic structure through the combination of organic fluorescence emission and another form of emission that is enabled by the surface plasmons in the plasmonic structure. The emission wavelength of the latter depends on the Alq3 thickness and can be tuned within the Alq3 fluorescent spectra. Therefore, a two-color broadband, color-tunable mixed PL structure was obtained. Obvious changes in the Commission Internationale d'Eclairage (CIE) coordinates and the corresponding emission colors of Au-Alq3-Au samples clearly varied with the Alq3 thickness (90, 130, and 156 nm).

No MeSH data available.


Measured transmittance spectra from Au (20 nm)/Alq3/Au (20 nm) samples with different Alq3 layer thicknesses. Results of theoretical simulations are shown.
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Figure 3: Measured transmittance spectra from Au (20 nm)/Alq3/Au (20 nm) samples with different Alq3 layer thicknesses. Results of theoretical simulations are shown.

Mentions: Figure 3 shows the transmittance spectra of the three MDM samples with the different Alq3 thicknesses, measured using a Lambda 35 UV-vis spectrophotometer (PerkinElmer Inc., Waltham, MA, USA). Because both Au layers are sufficiently thin, externally incident light can be transmitted through the MDM structure by resonant transmission with the radiative optical modes that are present in the MDM structure. Therefore, the peaks that are induced by the odd SP can be observed in the transmittance spectra. To support the determination of the exact structure, the transmittance of a p-polarized plane wave in air, incident on 30-nm-thick Au/90, 130, and 156-nm-thick Alq3/30-nm-thick Au structures, was simulated using the software that was written by the authors and based on the solution for the boundary conditions of the electromagnetic waves, and the results thus obtained are also shown in Figure 3. The calculated and measured transmission peak positions match each other closely, and the transmitted wavelength depends sensitively on the thickness of Alq3 layer. From Figure 3, the wavelengths of the photons whose emission is enabled by the odd SP in the normal direction for samples A, B, and C are approximately 550, 650, and 750 nm, respectively.


Color-tunable mixed photoluminescence emission from Alq3 organic layer in metal-Alq3-metal surface plasmon structure.

Chen NC, Liao CC, Chen CC, Fan WT, Wu JH, Li JY, Chen SP, Huang BR, Lee LL - Nanoscale Res Lett (2014)

Measured transmittance spectra from Au (20 nm)/Alq3/Au (20 nm) samples with different Alq3 layer thicknesses. Results of theoretical simulations are shown.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4199778&req=5

Figure 3: Measured transmittance spectra from Au (20 nm)/Alq3/Au (20 nm) samples with different Alq3 layer thicknesses. Results of theoretical simulations are shown.
Mentions: Figure 3 shows the transmittance spectra of the three MDM samples with the different Alq3 thicknesses, measured using a Lambda 35 UV-vis spectrophotometer (PerkinElmer Inc., Waltham, MA, USA). Because both Au layers are sufficiently thin, externally incident light can be transmitted through the MDM structure by resonant transmission with the radiative optical modes that are present in the MDM structure. Therefore, the peaks that are induced by the odd SP can be observed in the transmittance spectra. To support the determination of the exact structure, the transmittance of a p-polarized plane wave in air, incident on 30-nm-thick Au/90, 130, and 156-nm-thick Alq3/30-nm-thick Au structures, was simulated using the software that was written by the authors and based on the solution for the boundary conditions of the electromagnetic waves, and the results thus obtained are also shown in Figure 3. The calculated and measured transmission peak positions match each other closely, and the transmitted wavelength depends sensitively on the thickness of Alq3 layer. From Figure 3, the wavelengths of the photons whose emission is enabled by the odd SP in the normal direction for samples A, B, and C are approximately 550, 650, and 750 nm, respectively.

Bottom Line: The emission wavelength of the latter depends on the Alq3 thickness and can be tuned within the Alq3 fluorescent spectra.Therefore, a two-color broadband, color-tunable mixed PL structure was obtained.Obvious changes in the Commission Internationale d'Eclairage (CIE) coordinates and the corresponding emission colors of Au-Alq3-Au samples clearly varied with the Alq3 thickness (90, 130, and 156 nm).

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Electronic Engineering, Chang Gung University, Tao-Yuan 333, Taiwan ; Institute of Electro-Optical Engineering, Chang Gung University, Tao-Yuan 333, Taiwan.

ABSTRACT
This work reports the color-tunable mixed photoluminescence (PL) emission from an Alq3 organic layer in an Au-Alq3-Au plasmonic structure through the combination of organic fluorescence emission and another form of emission that is enabled by the surface plasmons in the plasmonic structure. The emission wavelength of the latter depends on the Alq3 thickness and can be tuned within the Alq3 fluorescent spectra. Therefore, a two-color broadband, color-tunable mixed PL structure was obtained. Obvious changes in the Commission Internationale d'Eclairage (CIE) coordinates and the corresponding emission colors of Au-Alq3-Au samples clearly varied with the Alq3 thickness (90, 130, and 156 nm).

No MeSH data available.