Figure 23.

TMD hybrid photodetectors. a) Spectral responsivity of MoS₂/PbS QD hybrid photodetector under an applied bias of 2 V and 100 mW illumination. S1–S4 refers to the hybrid heterostructure synthesized from the following lead acetate concentration: 1, 5, 10, and 25 mg in 50 mL of aqueous DMF solution. Reproduced with permission.^{[ 159 ]} Copyright 2019, Royal Society of Chemistry. b) Photocurrent transients of MoS₂/PbSe QD (black line) and MoS₂ photodetectors. Reproduced with permission.^{[ 160 ]} Copyright 2014, WILEY‐VCH. c) MoS₂/g‐C₃N₄ hybrid photodetector on paper substrate. i) Schematic representation of preparation of MoS₂ and g‐C₃N₄ hybrid dispersions and schematic illustration of the hybrid photodetector. ii) Dark (black) and photocurrent (532 nm‐green; 365 nm‐purple), and iii) ratios of the photocurrent to the dark current of the hybrid photodetector as a function of the composition of the MoS₂ and g‐C₃N₄. Reproduced with permission.^{[ 161 ]} Copyright 2017, WILEY‐VCH. d) TMD/polymer composite photodetectors. i) Schematic representation of hexagonal layers of transition metal atoms (M) sandwiched between two layers of chalcogenides (X) and the interaction between the lone electron pairs of nitrogen atoms of the amine‐terminated polymers and the electron‐accepting metal atoms of the TMD. ii) I–V characteristics of the composite MoSe₂ photodetector in the dark and under different light intensities of NIR light at a wavelength of 1064 nm. iii) Ratios of the photocurrent to the dark current of the MoSe₂ composites with different amine‐terminated polymers and the current ratios of various other TMD composites with PS‐NH₂. iv) Detectivity as functions of the composition of the MoSe₂ and MoS₂ mixtures embedded in PS‐NH₂ at wavelengths of 532 and 1064 nm. Reproduced with permission.^{[ 162 ]} Copyright 2015, Springer Nature.