Polarization-based colour tuning of mixed colloidal quantum-dot thin films using direct patterning
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2022-03-16
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Journal Article
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Abstract
Colloidal quantum-dots (cQDs) are finding increasingly widespread application in photonics and optoelectronics, providing high brightness and record-wide colour gamuts. However, the external quantum efficiencies in thin-film device architectures are still limited due to losses into waveguide modes and different strategies are being explored to promote the outcoupling of emission. Here we use a template-stripping-based direct-patterning strategy to fabricate linear gratings at the surface of cQD thin films. The linear gratings enhance optical outcoupling through Bragg scattering, yielding bright emission with a strong degree of linear polarization. By patterning linear gratings with different periodicities and orientations onto a film of mixed-colour cQDs, we demonstrate polarization-based active colour tuning of the thin-film emission.
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published
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14 (13)
Pages / Article No.
4929 - 4934
Publisher
Royal Society of Chemistry
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Organisational unit
03875 - Norris, David J. / Norris, David J.
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Funding
161243 - Multiresonant Bull's Eyes for Plasmonic Surface Enhancement (SNF)