Zero Dimensional-Two Dimensional Hybrid Photodetectors Using Multilayer MoS2 and Lead Halide Perovskite Quantum Dots with a Tunable Bandgap.

ABSTRACT

We report high-performance 0D-2D hybrid photodetectors integrated with tunable band gap perovskite (CsPbI3, CsXFAX-1PbI3, and FAPbI3) quantum dots and MOCVD-grown bilayer MoS2. In our hybrid structure, the lead halide PQDs can be utilized as an absorbing layer of light of specific wavelengths and transfer the photogenerated carriers to the MoS2 transport layer. With tunable wavelength lead halide PQDs, the 0D-2D hybrid photodetector shows a high responsivity up to 107 AW-1 and high specific detectivity exceeding 1013 Jones due to the difference in the built-in potential between PQDs and multilayer MoS2 layers. This work proposes the possibility of fabricating high-performance photodetectors by hybridizing PQDs of various band gaps with 2D materials.