Journal
ACS PHOTONICS
Volume 4, Issue 2, Pages 223-227Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.6b00964
Keywords
upconversion; near-infrared; organic light-emitting diode; thermally activated delayed fluorescence; imaging
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Funding
- Japan Society for the Promotion of Science (JSPS) [15H01049, 15H06470]
- Cooperative Research Program of Network Joint Research Center for Materials and Devices
- Futaba Electronics Memorial Foundation
- KDDI Foundation
- Canon Foundation
- Grants-in-Aid for Scientific Research [15H06470, 15H01049] Funding Source: KAKEN
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Full-color all-organic optical upconversion devices that can directly convert incident near-infrared (NIR) light into tunable visible light were developed by integrating an organic light emitting diode (OLED) on an NIR-sensitizing organic photo detector. Thermally activated delayed fluorescence (TADF) emitters were utilized for the first time in the upconversion devices for achieving high electroluminescence (EL) efficiency in the OLED unit and high overall upconversion efficiency. The emission color of upconversion EL can be varied across the entire visible region ranging from blue to red and white by judicious selection of the incorporating TADF emitters. These all-organic optical upconversion devices have a great potential for low-cost, large area, pixelless NIR imaging applications.
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