Plasmonic Au@Ag-upconversion nanoparticle hybrids for NIR photodetection via an alternating self-assembly method

Abstract

Flat and dense monolayer Au@Ag nanorods/UCNPs (50–400 nm) is fabricated by an alternating self-assembly method. The optimized photoresponsivity and detectivity of Au@Ag NRs/UCNPs (150 nm)/MAPbI3 PDs is separately 0.51 A W−1 and 6.9 × 109 Jones.

Swallowed Embedding of Nanopetal-Rich Microflowers in Flexible Photocatalytic and Thermoresponsive Functional Composite Fibers

“…In addition, Er 3+ filled in the 4 F 9/2 level caused by photon absorption and ET process are relaxed to the ground state, achieving the red emission at 656 nm. Therefore, the two-photon excitation process generated the green and red emissions of Er 3+ , and the intense green emissions centered at 528 and 550 nm can be used as thermal coupling energy levels for the application of temperature sensing. , …”

“…Therefore, the two- photon excitation process generated the green and red emissions of Er 3+ , and the intense green emissions centered at 528 and 550 nm can be used as thermal coupling energy levels for the application of temperature sensing. 60,61 Materials with Er-doping have become the main choice for optical temperature sensing by FIR technology, which benefits from the transition luminescence corresponding to the thermal coupling levels 2 H 11/2 and 4 S 3/2 of Er 3+ , and high intensity of a green thermal fluorescence signal captured easily by detection. 62−64 Here, based on the FIR analysis, the best sample of BOB-E 0.25 Y 0.25 MFs is excited at 977 nm.…”

Heterostructures made from bone-like plasmonic Au nanoantennas and ZnO quantum dots for broadband photodetectors

“…Clearly, BLAuNA2/ZnO heterostructures photodetector exhibits a largely improved SNR because of their large I ph and extremely low I d , indicating its outstanding capability to discern optical information from the dark noise. To quantitatively evaluate the photoresponse performance of four photodetectors, the responsivity (R), detectivity (D), and external quantum efficiency (EQE) were calculated using the following equations 46,49,50…”

Enhancement of upconversion photoluminescence in phosphor nanoparticle thin films using metallic nanoantennas fabricated by colloidal lithography

“…This can be achieved by tuning the material properties and the dimensions of the individual plasmon nanoparticles. [36][37][38] For example, core 36,37 and core/shell [38][39][40] metallic nanorods have been carefully synthesized to support LSPRs tuned to the excitation or emission of UCNPs, resulting in several-fold enhancement of UCPL. An alternative route to tailoring LSPRs relies on the use of lithographic methods.…”