Fig. 4: Photoresponse, power-dependent, and spectrum-dependent characteristics of the Gr/GdIG/Si photodetector. | Microsystems & Nanoengineering

Fig. 4: Photoresponse, power-dependent, and spectrum-dependent characteristics of the Gr/GdIG/Si photodetector.

From: High-performance photodetector based on an interface engineering-assisted graphene/silicon Schottky junction

Fig. 4

a Comparison of I-V curves between the photodetectors with and without GdIG interlayer. b Photocurrent versus time characteristics, showing the enhanced Ilight/Idark ratio. c Photoresponse at large-scale power density variation (down to nW/cm2 level, demonstrating the weak-light detectability). The arrow indicates the direction of power increase. d Photoresponse with small steps of power variation at high intensities, indicating a near-linear behavior. e Multiband response at different incident wavelengths. f Specific detectivity and noise equivalent power from UV to NIR spectrum

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