Dual-step photocarrier injection by mixture layer of ZnO QDs and MoS2 NPs on hybrid PdAu NPs

Hybrid UV-photodetector (PD) design consisted of various compatible nano-material systems are drawing significant research interests due to their improved device tunability and functionality. A hybrid ZnO-MoS2/HNP UV-PD design is demonstrated by the mixture layer of zinc oxide (ZnO) quantum dot (QD) and molybdenum disulfate (MoS2) nanoparticles (NPs) on the plasmonic hybrid PdAu NP template. The proposed design exhibits an excellent photocurrent of 1.45x10- 3 A under the 54.9 mW/mm2 at +/- 10 V due to a dual step enhancement of photo-carrier injection. It then leads to the significantly improved performance factors of photo-responsivity 1430 mA/mm2 and detectivity 4.50 x 1010 jones at 0.34 mW/mm2. The rise time (Tr) and fall time (Tf) of 3.37 and 0.35 s are obtained for the ZnO-MoS2/HNP PD. The demonstrated performance factors indicate that the hybrid ZnO-MoS2/HNP UV-PD platform is one of the best UV-PDs as summarized in Table 1.

Automated summary

Hybrid UV-photodetector (PD) design with compatible nano-material systems has gained significant attention for its improved device tunability and functionality. In this study, a hybrid ZnO-MoS2/HNP UV-PD design is demonstrated by incorporating a mixture layer of zinc oxide quantum dot (QD) and molybdenum disulfate nanoparticles (NPs) on a plasmonic hybrid PdAu NP template. The proposed design exhibits excellent photocurrent and significantly improved performance factors.