Ti₃C₂Tₓ/Si Nanoholes Array (SiNHA) Schottky Photodiode for Filter-Free Color Single-Pixel Imaging (SPI)

In this letter, we report a self-powered Ti₃C₂T_x/Si nanoholes array (SiNHA) Schottky photodiode fabricated by spin-coating Ti₃C₂T_x layer. The device exhibited enhanced photoresponse over the broadband wavelength range (265-1200 nm) and an excellent linear dynamic range (LDR, 119 dB), showing responsivity, specific detectivity and response speed of 0.97 A W $^{-{1}}$ , $1.03\times 10^{{14}}$ Jones and 162/ $60~\mu $ s for rise/fall time at zero bias upon 970 nm illumination (light intensity: $2.5~\mu $ W cm $^{-{2}}$ ), respectively. The broadband photoresponse ensured the high-quality visible Fourier single-pixel imaging (FSI) and a $256\times 256$ -pixel color image was achieved by synthesizing R-, G-, and B-channel monochrome images obtained at 7.79% sampling rate. This work also provides a simple strategy for filter-free color single-pixel imaging (SPI).