Controlling the Chromaticity of White-Emitting LEDs Through Solvatochromism
LEDs that emit white light are commercially available in various shades, ranging from ‘cool white’ to ‘warm white’. They employ different luminescent wavelength converting materials (phosphors) to achieve specific spectral outputs. In this work we show that solvatochromism—the ability to change the...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-02-01
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| Series: | Photonics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2304-6732/12/3/189 |
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| Summary: | LEDs that emit white light are commercially available in various shades, ranging from ‘cool white’ to ‘warm white’. They employ different luminescent wavelength converting materials (phosphors) to achieve specific spectral outputs. In this work we show that solvatochromism—the ability to change the color of fluorescence emission by dissolving a soluble luminescent material in different solvents—can be used to easily set the color point of a white-emitting LED. Compared to the use of all-solid phosphors, this liquid phosphor technology allows continuous tunability of emission colors over, potentially, a broader range of color shades. Via the appropriate choice of a solute and solvent combination, any desired chromaticity point and correlated color temperature, within the bounds allowed by the particular material combination, can be achieved. By using the right manufacturing technology, such LEDs can be mass-produced because most of their other components are the same as that of traditional LEDs. |
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| ISSN: | 2304-6732 |