Optical Investigations of Nanorod-Substrate Interaction for Light Management

Mangalgiri, G.; Manley, Phillip; Riedel, Wiebke; Schmid, Martina

doi:10.1364/cleo_at.2016.jth2a.15

Cited by 1 publication

(1 citation statement)

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“…It has been reported that visible light scattering occurs well in ZnO nanorods with diameters and lengths similar to those of the ZnO nanorods used in this study. 40 Therefore, the inclusion of rod-shaped scattering particles is also expected to be effective for improving the extraction of the QD light. Combining the two effects of increased blue-light absorption and improved red-light extraction by scattering, more QD light is probable to be emitted from the QD CCL with mixed-shaped scattering particles than from those with only the spherical shaped ones.…”

Section: Measurement and Characterizationmentioning

confidence: 99%

Efficient Quantum Dot Color Conversion Layer with Mixed Spherical/Rod-Shaped Scattering Particles

Park

Hahm

Cho

et al. 2023

ACS Appl. Opt. Mater.

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A quantum dot (QD) color conversion layer (CCL) with mixed-shaped scattering nanoparticles exhibits enhanced light conversion and reduced blue leakage in QD-organic light-emitting diodes (OLEDs). In this study, nontoxic bright red QDs and spherical and rod-shaped zinc oxide (ZnO) nanoparticles were mixed in an ultraviolet-curable resin without aggregation. The mixture of spherical and rod-shaped ZnO nanoparticles enhanced the blue light scattering inside the QD CCL, which results in an increase of the blue absorption by the QDs and a dramatic improvement of the color conversion. Extraction of the converted red light was also attributed to the Mie scattering of the rod-shaped scattering nanoparticles. The QD CCL with 15 wt % mixed-shaped scattering particles showed seven times increase of red intensity and four times decrease of blue intensity compared to that without scattering particles. We fabricated direct coat-type QD-OLEDs and confirmed that the color conversion and output/input efficiencies were improved and the blue leakage was decreased with increasing number of QD CCLs. This method improves the color conversion efficiency without increasing the amount of QDs and reducing the blue leakage without using a color filter.

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Section: Measurement and Characterizationmentioning

confidence: 99%