High Performance Color Conversion Polymer Films and Their Application to OLED Devices

Nagai, Masaru

doi:10.5772/8397

Cited by 1 publication

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References 9 publications

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“…This would effectively enhance the QY of the CCM layer, leading to higher luminous yield. 7 To avoid this extra effect large precursors (M = 10,000) were used.…”

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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“…This would effectively enhance the QY of the CCM layer, leading to higher luminous yield. 7 To avoid this extra effect large precursors (M = 10,000) were used.…”

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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High Performance Color Conversion Polymer Films and Their Application to OLED Devices

Cited by 1 publication

References 9 publications

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

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High Performance Color Conversion Polymer Films and Their Application to OLED Devices

Cited by 1 publication

References 9 publications

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

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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