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

• Published in: Materials research bulletin 2022-07, Vol.151, p.111832, Article 111832
• Main Authors: Mandavkar, Rutuja, Lin, Shusen, Kulkarni, Rakesh, Burse, Shalmali, Habib, Md Ahasan, Kunwar, Sundar, Lee, Jihoon
• Format: Article
• Language: English
• Subjects: Dual-step photocarrier injection; FDTD simulation; Hybrid PdAu NPs; Material Science; MATERIALS SCIENCE; MoS2 NPs; UV photodetectors; ZnO QDs; ZnO QDsMoS2 NPs
• ISSN: 0025-5408; 1873-4227
• DOI: 10.1016/j.materresbull.2022.111832

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 di-sulfate (MoS2) nanoparticles (NPs) on the plasmonic hybrid PdAu NP template. The proposed design exhibits an excellent photocurrent of 1.45×10−3 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 × 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. •Demonstration of a novel hybrid photodetector architecture of MoS2–ZnO on hybrid PDAu NPs.•Superior device performances: photoresponsivity of 1430 mA/W, detectivity of 4.50 × 1010 jones and EQE of 460%.•Systematic comparison of photoresponse of bare ZnO, ZnO/HNPs and MoS2–ZnO/HNP UV-PD.•Detailed explanation for photocurrent enhancement mechanism by the FDTD simulation, cross-sectional analyses, and energy band diagram.•A hybrid UV photodetector design is demonstrated by the mixture layer of zinc oxide (ZnO) quantum dot (QD) and molybdenum di-sulfate (MoS2) nanoparticles (NPs) on the plasmonic hybrid PDAu NP template, namely, hybrid ZnO–MoS2/HNP UV photodetector. [Display omitted]