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- W2051783351 abstract "Free carrier absorption in heavily doped silicon can have a significant impact on devices operating in the infrared. In the near infrared, the free carrier absorption process can compete with band to band absorption processes, thereby reducing the number of available photons to optoelectronic devices such as solar cells. In this work, we fabricate 18 heavily doped regions by phosphorus and boron diffusion into planar polished silicon wafers; the simple sample structure facilitates accurate and precise measurement of the free carrier absorptance. We measure and model reflectance and transmittance dispersion to arrive at a parameterisation for the free carrier absorption coefficient that applies in the wavelength range between 1000 and 1500 nm, and the range of dopant densities between ∼1018 and 3 × 1020 cm−3. Our measurements indicate that previously published parameterisations underestimate the free carrier absorptance in phosphorus diffusions. On the other hand, published parameterisations are generally consistent with our measurements and model for boron diffusions. Our new model is the first to be assigned uncertainty and is well-suited to routine device analysis." @default.
- W2051783351 created "2016-06-24" @default.
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- W2051783351 date "2014-08-14" @default.
- W2051783351 modified "2023-10-09" @default.
- W2051783351 title "Near-infrared free carrier absorption in heavily doped silicon" @default.
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- W2051783351 doi "https://doi.org/10.1063/1.4893176" @default.
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