22.3: New Full Color OLEDs Technology Based on Advanced Color Conversion Method Using Ink‐Jet Printing

Kimura, Hiroshi; Kawaguchi, K.; Saito, Tetsuya; Nagai, Masaru; Asakawa, Tadashi; Li, Chong; Hashida, Hiroshi

doi:10.1889/1.3069651

Cited by 2 publications

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“…The CCM OLED devices are described in detail elsewhere. 9 The adhesive filler consisted of thermosetting acrylate polymers. If acrylate polymer precursors with a low molecular weight (M < 3,000) were used, they would easily diffuse into the CCM layer and act as spacers in the polymer chains.…”

Section: Methodsmentioning

confidence: 99%

“…[1][2] We previously reported a method that uses a CCM for fabricating organic light-emitting diodes (OLEDs). [7][8][9] It is well suited for fabricating large-display devices because it does not use a high-cost shadow mask for pixel patterning. CCM-based OLED devices use blue-emission OLEDs as backlight, and green/red emission is attained using PL from the CCM film.…”

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confidence: 99%

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Effect of Molecular Weight and Conformation on Photoluminescence Quantum Yield of Fluorene/poly(2-methoxy-5-(2^′-ethylhexyloxy)-1,4-phenylene vinylene) (MEH−PPV) Copolymers

Nagai¹

2013

ECS J. Solid State Sci. Technol.

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Improving the photoluminescence quantum yield of conjugated polymer films is very important for color-conversion materials and polymer-based photo-electronic devices. We investigated the effect of the molecular weight and conformation of fluorene/MEH−PPV copolymers on the photoluminescence quantum yield of conjugated polymer films. The films cast from high molecular weight copolymers had high quantum yields (61.2 ± 5.0%) and flexible-coil conformation. The quantum yields of low molecular weight copolymers were significantly lower following film formation (26.8 ± 0.05%) and rod-like conformation. Large reduction in the 0−0 emission band was observed following quantum yield reduction, suggesting increased energy transfer rate. The low molecular weight polymers were prone to easy π-π stack structure formation due to their stretched conformation. This structure promoted the energy transfer rate between polymers and thus the energy that comes to quenching sites increased, leading to the reduction in quantum yield. Although the reduction in the quantum yield of conjugated polymer films is generally attributed to aggregate formation, the red-shift in the absorbance and photoluminescence spectra following film formation, which indicate aggregate formation, was small and uncorrelated with the quantum yield.

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Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

Effect of Molecular Weight and Conformation on Photoluminescence Quantum Yield of Fluorene/poly(2-methoxy-5-(2^′-ethylhexyloxy)-1,4-phenylene vinylene) (MEH−PPV) Copolymers

Nagai¹

2013

ECS J. Solid State Sci. Technol.

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Study on Color Shifting Mechanism for Organic Light Emitting Diode with Red Dopant-doped Emitting Layer

Lee¹,

Oh²

2011

Journal of the Korea Academia-Industrial cooperation Society

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The Color shift phenomenon is becoming a major degradation factor of the emitting color purity in the organic emitting diodes which is generating a plurality of colors. In this study, the basic structure of organic light emitting diode device is comprised of ITO/α-NPD/Alq3:DCJTB[wt%]/Alq3/Mg:Ag, we have carry out numerical simulation of the electric-optical characteristics in organic light emitting diode device to estimate the mechanism of color shift phenomenon. We have investigated the causes of the color shift through the change of DCJTB doping concentration ratio. As the result, we have confirmed that the changes of the recombination rate which generated by trapped electrons and holes is one of the major factors for the color shift phenomenon.

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22.3: New Full Color OLEDs Technology Based on Advanced Color Conversion Method Using Ink‐Jet Printing

Cited by 2 publications

References 1 publication

Effect of Molecular Weight and Conformation on Photoluminescence Quantum Yield of Fluorene/poly(2-methoxy-5-(2^′-ethylhexyloxy)-1,4-phenylene vinylene) (MEH−PPV) Copolymers

Effect of Molecular Weight and Conformation on Photoluminescence Quantum Yield of Fluorene/poly(2-methoxy-5-(2^′-ethylhexyloxy)-1,4-phenylene vinylene) (MEH−PPV) Copolymers

Study on Color Shifting Mechanism for Organic Light Emitting Diode with Red Dopant-doped Emitting Layer

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22.3: New Full Color OLEDs Technology Based on Advanced Color Conversion Method Using Ink‐Jet Printing

Cited by 2 publications

References 1 publication

Effect of Molecular Weight and Conformation on Photoluminescence Quantum Yield of Fluorene/poly(2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylene vinylene) (MEH−PPV) Copolymers

Effect of Molecular Weight and Conformation on Photoluminescence Quantum Yield of Fluorene/poly(2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylene vinylene) (MEH−PPV) Copolymers

Study on Color Shifting Mechanism for Organic Light Emitting Diode with Red Dopant-doped Emitting Layer

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Product

Resources

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Effect of Molecular Weight and Conformation on Photoluminescence Quantum Yield of Fluorene/poly(2-methoxy-5-(2^′-ethylhexyloxy)-1,4-phenylene vinylene) (MEH−PPV) Copolymers

Effect of Molecular Weight and Conformation on Photoluminescence Quantum Yield of Fluorene/poly(2-methoxy-5-(2^′-ethylhexyloxy)-1,4-phenylene vinylene) (MEH−PPV) Copolymers