▎ 摘　　要

We for the first time employ bis(trifluoromethanesulfonyl)-amide as a dopant for graphene to enhance the efficiency and the stability of graphene/Si quantum dot (SQDs)-embedded SiO2 (SQDs:SiO2) multilayer (ML) heterojunction photodetectors (PDs). With increasing the doping concentration (n(D)) to 30 mM, the sheet resistance of the doped-graphene transparent conductive electrode (TCE) sharply decreases to similar to 155 ohm sq(-1) with only 1% reduction in its transmittance at 550 nm, whilst the work function gradually increases to similar to 4.95 eV, indicating p-type doping, useful for the graphene/SQDs:SiO2 MLs interface. The DC conductivity/optical conductivity ratio saturates to similar to 75 at n(D) = 20 mM, much larger than the minimum industry standard (= 35) for the optoelectronic applications of TCEs. The PDs optimized at n(D) = 20 mM exhibit 0.413 A W-1 responsivity (R), 92 dB linear dynamic range, 1.09 x 10(10) cm Hz(1/2) W-1 detectivity, and 81.33% external quantum efficiency at a peak wavelength of 630 nm, and the loss of R is almost negligible while the PDs are kept for 700 h in air. These characteristics are comparable to those of commercially-available Si PDs and better than those of previously-reported graphene/Si PDs.