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Quantum dot (QD) solar cells have been proposed as a means to exceed the Shockley and Queisser efficiency limit of 31%, via the absorption of sub-band-gap photons, conventionally lost in a single junction solar cell (SC). Previous reports on fabricated InAs/GaAs QDSCs showed a slight increase in photoresponse, due to below-band gap absorption. However, they all showed a severe degradation of open...
Only summary form given. An array of 3D photonic crystals for infrared wavelengths of 1.3-1.6 mum is assembled on a chip by micromanipulation. Each of the crystals possesses a different structure with various in-plane period, number of layers, and defect sizes. Photoluminescence measurements showed that emissions from an active layer were suppressed in the regions of photonic bandgaps, whereas sharp...
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