Dataset for Nanowire solar cell above the radiative limit
Wat erin zit
A lossless solar cell operating at the Shockley-Queisser limit generates an open circuit voltage (V oc ) equal to the radiative limit. At V oc , the highly directional beam of photons from the sun is absorbed and subsequently externally re-emitted into a 4π solid angle, providing a large photon entropy loss. A solar cell can beat the Shockley-Queisser limit and approach the 46.7% ultimate limit by decreasing the output solid angle of the light emission at open circuit conditions. Here, we present a design for an InP single nanowire solar cell capable to operate 159 mV above the radiative limit. We first optimize the spontaneous emission factor (b-factor in the dataset) into a guided mode of the nanowire towards 68%. We subsequently launch a guided mode at the bottom straight part of the tapered nanowire yielding a photon escape probability of 81% for a tapering angle of θ=1.2 degrees and a top facet with a radius of 83 nm (transmission part of the dataset). When assuming homogeneous light emission along the nanowire, an outcoupling efficiency of 42% of the emitted light is obtained. The final optimization is the reduction of the emission cone towards 0.011 sr by focusing the …
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