Spectral changes associated with transmission of OLED emission through human skin
| Autor: | Trent L. Brooks-Richards, Soniya D. Yambem, Maria A. Woodruff, Pankaj Sah, Ajay K. Pandey, Marcin Kielar, David Peter Forrestal |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Materials science Light Transmitted light lcsh:Medicine Color Human skin Article law.invention 03 medical and health sciences Wearable Electronic Devices 0302 clinical medicine law OLED Cadaver Humans Organic LEDs lcsh:Science Electroluminescence spectra Lighting Skin Multidisciplinary business.industry lcsh:R Full width at half maximum 030104 developmental biology Transmission (telecommunications) Optoelectronics lcsh:Q business Applied optics 030217 neurology & neurosurgery Light-emitting diode |
| Zdroj: | Scientific Reports Scientific Reports, Vol 9, Iss 1, Pp 1-7 (2019) |
| ISSN: | 2045-2322 |
| Popis: | A recent and emerging application of organic light emitting diodes (OLEDs) is in wearable technologies as they are flexible, stretchable and have uniform illumination over a large area. In such applications, transmission of OLED emission through skin is an important part and therefore, understanding spectral changes associated with transmission of OLED emission through human skin is crucial. Here, we report results on transmission of OLED emission through human skin samples for yellow and red emitting OLEDs. We found that the intensity of transmitted light varies depending on the site from where the skin samples are taken. Additionally, we show that the amount of transmitted light reduces by ~ 35–40% when edge emissions from the OLEDs are blocked by a mask exposing only the light emitting area of the OLED. Further, the emission/electroluminescence spectra of the OLEDs widen significantly upon passing through skin and the full width at half maximum increases by >20 nm and >15 nm for yellow and red OLEDs, respectively. For comparison, emission profile and intensities of transmitted light for yellow and red inorganic LEDs are also presented. Our results are highly relevant for the rapidly expanding area of non-invasive wearable technologies that use organic optoelectronic devices for sensing. |
| Databáze: | OpenAIRE |
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