Projection lithography patterned high-resolution quantum dots/thiol-ene photo-polymer pixels for color down conversion
© 2019 Optical Society of America. Pixelated color converters are envisioned to achieve full-color high-resolution display through down conversion of blue/ultraviolet(UV) micro-LEDs. Quantum dots (QDs) are promising narrow-band converters of high quantum efficiency and brightness enabling saturated...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
The Optical Society
2021
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| Online Access: | https://hdl.handle.net/1721.1/136500 |
| Summary: | © 2019 Optical Society of America. Pixelated color converters are envisioned to achieve full-color high-resolution display through down conversion of blue/ultraviolet(UV) micro-LEDs. Quantum dots (QDs) are promising narrow-band converters of high quantum efficiency and brightness enabling saturated colors with wide color gamut in displays. Here we demonstrate high-resolution pixelated red and green QDs/thiol-ene photo-polymer converters (single pixel down to 6 µm; converters array of 21 µm pixel, 30 µm pitch and sub 10 µm thickness) patterned through projection lithography. QDs capped with amine surface group are uniformly dispersed in thiol-ene photo-polymer matrix at high concentrations (up to 100 mg/mL), which reduces aggregation and improves conversion efficiency by 0.5-1 times compared to drop-cast QDs. Color cross-talk is also reduced through patterning light blocking walls between converter pixels. |
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