Doctor-blade deposition of quantum dots onto standard window glass for low-loss large-area luminescent solar concentrators

Hongbo Li, Kaifeng Wu, Jaehoon Lim, Hyung-Jun Song and Victor I. Klimov ()
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Hongbo Li: Center for Advanced Solar Photophysics, Los Alamos National Laboratory
Kaifeng Wu: Center for Advanced Solar Photophysics, Los Alamos National Laboratory
Jaehoon Lim: Center for Advanced Solar Photophysics, Los Alamos National Laboratory
Hyung-Jun Song: Center for Advanced Solar Photophysics, Los Alamos National Laboratory
Victor I. Klimov: Center for Advanced Solar Photophysics, Los Alamos National Laboratory

Nature Energy, 2016, vol. 1, issue 12, 1-9

Abstract: Abstract Luminescent solar concentrators (LSCs) are envisioned to reduce the cost of solar electricity by decreasing the usage of more expensive photovoltaic (PV) materials and diminishing the complexity of multi-cell PV modules. The LSC concept can also enable unconventional solar-energy conversion devices such as PV windows that can be especially useful in highly populated urban areas. Here we demonstrate low-loss, large-area (up to about 90 × 30 cm2) LSCs fabricated from colloidal core/shell quantum dots (QDs) whose optical spectra are tailored so as to minimize self-absorption of waveguided radiation. For improved compatibility with a polymer matrix and enhanced stability, QDs are encapsulated into silica shells, which allows for maintaining high emission efficiencies (∼70% quantum yields) under four-month exposure to air and light, and heat treatments up to 200 ∘C. The QD/polymer composites are processed into devices using standard doctor-blade deposition onto commercial window glasses. The fabricated semi-transparent devices demonstrate internal quantum efficiencies of more than 10% for dimensions of tens of centimetres.

Date: 2016
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DOI: 10.1038/nenergy.2016.157

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