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Electrically Controllable Light Trapping for Self-Powered Switchable Solar Windows
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DOI：10.1021/acsphotonics.6b00518.png)
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Abstract
En 中文
The ability to electrically control transparency and scattering of light is important for many optoelectronic devices; however, such versatility usually comes with additional unwanted optical absorption and power loss. Here we present a hybrid switchable solar window device based on polymer dispersed liquid crystals (PDLCs) coupled to a semiconducting absorber, which can switch between highly transmissive and highly scattering states while simultaneously generating power. By applying a voltage across the PDLC layer, the device switches from an opaque, light scattering structure (useful for room light dimming, privacy, and temperature control) to a clear, transparent window. Further, enabled by the very low operating power requirements of the PDLC (<0.8 mW/cm(2)), we demonstrate that these switchable solar windows have the, potential for self-powering with as little as 13 nm of a-Si.
Keywords:
photovoltaics
smart window
liquid crystal
light trapping
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