Journal
OPTICS EXPRESS
Volume 27, Issue 21, Pages 30864-30874Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.27.030864
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Funding
- OSRAM-MIT Joint Research
- Directorate for Engineering [DMR1419807]
- Army Research Office [W911NF-13-D-0001]
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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 mu m; converters array of 21 mu m pixel, 30 mu m pitch and sub 10 mu m 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. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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