Boosting Perovskite Photodetector Performance in NIR Using Plasmonic Bowtie Nanoantenna Arrays.
Bin WangYuting ZouHuanyu LuWenchi KongSubhash C SinghChen ZhaoChaonan YaoJun XingXin ZhengZhi YuCunzhu TongWei XinWeili YuBo ZhaoChunlei GuoPublished in: Small (Weinheim an der Bergstrasse, Germany) (2020)
Triple-cation mixed metal halide perovskites are important optoelectronic materials due to their high photon to electron conversion efficiency, low exciton binding energy, and good thermal stability. However, the perovskites have low photon to electron conversion efficiency in near-infrared (NIR) due to their weak intrinsic absorption at longer wavelength, especially near the band edge and over the bandgap wavelength. A plasmonic functionalized perovskite photodetector (PD) is designed and fabricated in this study, in which the perovskite ((Cs0.06 FA0.79 MA0.15 )Pb(I0.85 Br0.15 )3 ) active materials are spin-coated on the surface of Au bowtie nanoantenna (BNA) arrays substrate. Under 785 nm laser illumination, near the bandedge of perovskite, the fabricated BNA-based plasmonic PD exhibits ≈2962% enhancement in the photoresponse over the Si/SiO2 -based normal PD. Moreover, the detectivity of the plasmonic PD has a value of 1.5 × 1012 with external quantum efficiency as high as 188.8%, more than 30 times over the normal PD. The strong boosting in the plasmonic PD performance is attributed to the enhanced electric field around BNA arrays through the coupling of localized surface plasmon resonance. The demonstrated BNA-perovskite design can also be used to enhance performance of other optoelectronic devices, and the concept can be extended to other spectral regions with different active materials.
Keyphrases
- solar cells
- room temperature
- single molecule
- energy transfer
- high efficiency
- photodynamic therapy
- ionic liquid
- living cells
- computed tomography
- magnetic resonance imaging
- label free
- risk assessment
- visible light
- optical coherence tomography
- fluorescent probe
- heavy metals
- magnetic resonance
- transcription factor
- binding protein
- quantum dots
- gold nanoparticles
- monte carlo
- reduced graphene oxide
- drug release
- tandem mass spectrometry