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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MDPI AG
2025-02-01
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| author | Md. Mahmudul Hasan Gregory Sheets Faiz Rahman |
| author_facet | Md. Mahmudul Hasan Gregory Sheets Faiz Rahman |
| author_sort | Md. Mahmudul Hasan |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-4500e54aba504d9583656985d1f8b3c0 |
| institution | DOAJ |
| issn | 2304-6732 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj-art-4500e54aba504d9583656985d1f8b3c02025-08-20T02:42:24ZengMDPI AGPhotonics2304-67322025-02-0112318910.3390/photonics12030189Controlling the Chromaticity of White-Emitting LEDs Through SolvatochromismMd. Mahmudul Hasan0Gregory Sheets1Faiz Rahman2School of Electrical Engineering and Computer Science, Russ College of Engineering and Technology, Ohio University, Athens, OH 45701, USASchool of Electrical Engineering and Computer Science, Russ College of Engineering and Technology, Ohio University, Athens, OH 45701, USASchool of Electrical Engineering and Computer Science, Russ College of Engineering and Technology, Ohio University, Athens, OH 45701, USALEDs 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.https://www.mdpi.com/2304-6732/12/3/189light-emitting diodesolvatochromismcharge transfer complexcoordination compound |
| spellingShingle | Md. Mahmudul Hasan Gregory Sheets Faiz Rahman Controlling the Chromaticity of White-Emitting LEDs Through Solvatochromism Photonics light-emitting diode solvatochromism charge transfer complex coordination compound |
| title | Controlling the Chromaticity of White-Emitting LEDs Through Solvatochromism |
| title_full | Controlling the Chromaticity of White-Emitting LEDs Through Solvatochromism |
| title_fullStr | Controlling the Chromaticity of White-Emitting LEDs Through Solvatochromism |
| title_full_unstemmed | Controlling the Chromaticity of White-Emitting LEDs Through Solvatochromism |
| title_short | Controlling the Chromaticity of White-Emitting LEDs Through Solvatochromism |
| title_sort | controlling the chromaticity of white emitting leds through solvatochromism |
| topic | light-emitting diode solvatochromism charge transfer complex coordination compound |
| url | https://www.mdpi.com/2304-6732/12/3/189 |
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