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. 2016 May 4;6:24909. doi: 10.1038/srep24909

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Copyright © 2016, Macmillan Publishers Limited

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(a–c) CdSe/CdS core/shell NPL decorated graphene samples. (a) Current versus voltage of a single channel under increasing illumination (see Fig. 2a-left for the legend). (b) Responsivity versus optical power density for V_DS = 10mV. (c) Responsivity as a function of optical modulation frequency. (d) Square voltage noise spectral densities of a bare graphene channel under different Wheatstone bridge excitation voltages V_I. Dashed line: fit according to equation . (e) Noise level βversus excitation voltageV_I of bare graphene (black) and CdSe/CdS NPL decorated graphene (red). Dashed line: power law fit giving an exponent1.9 ± 0.1. (f) Reduced specific detectivity where is the specific detectivity at 1Hz for a CdSe/CdS core/shell NPL decorated graphene photodetector as a function of frequency. Details about the calculations are given in Supplementary Information S7.

Inline graphic — (a–c) CdSe/CdS core/shell NPL decorated graphene samples. (a) Current versus voltage of a single channel under increasing illumination (see Fig. 2a-left for the legend). (b) Responsivity versus optical power density for V_DS = 10mV. (c) Responsivity as a function of optical modulation frequency. (d) Square voltage noise spectral densities of a bare graphene channel under different Wheatstone bridge excitation voltages V_I. Dashed line: fit according to equation . (e) Noise level βversus excitation voltageV_I of bare graphene (black) and CdSe/CdS NPL decorated graphene (red). Dashed line: power law fit giving an exponent1.9 ± 0.1. (f) Reduced specific detectivity where is the specific detectivity at 1Hz for a CdSe/CdS core/shell NPL decorated graphene photodetector as a function of frequency. Details about the calculations are given in Supplementary Information S7.