Exploring the Internal Radiative Efficiency of Selective Area Nanowires

Figure 3

Effect of and doping on the photoluminescence of nanowires. (a) Series of spectra normalized to the maximum of each one, with different -doping molar fractions, between and , showing a peak shifting to higher energy and an increase in FWHM, with increasing . (b) Time-resolved photoluminescence of the same samples, measured at a laser intensity of , highlighting the decreased minority carrier recombination lifetime with larger dopant molar flow. (c) PL intensity as a function of incident laser intensity, converted in multiples of 1.5 sun intensity: by rising incorporation, the emission strength decreases sharply. (d) Series of spectra normalized to the maximum of each one, with different -doping molar fractions, from to , showing no dependence of the peak shape on the molar flow. (e) Time-resolved photoluminescence of the same samples, measured at a laser intensity of , depicting the decrease in minority carrier recombination lifetime corresponding to a larger dopant molar flow. (f) PL intensity as a function of incident laser intensity, converted in multiples of 1.5 sun intensity: as the fraction increases, the intensity is monotonically enhanced.

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