Monitoring Transport Behavior of Charge Carriers in a Single CdS@CuS Nanowire via In Situ Single-Particle Photoluminescence Spectroscopy.
Mingshan ZhuChunyang ZhaiSooyeon KimMamoru FujitsukaTetsuro MajimaPublished in: The journal of physical chemistry letters (2019)
Examination of the spectral and kinetic characteristics of charge carrier recombination on nanostructured semiconductors by photoluminescence (PL) plays a significant role in understanding the photocatalytic process. Here, with an in situ single-particle PL technique, we studied the transport behavior of charge carriers in individual one-dimensional (1D) core-shell structures of CdS@CuS nanowires. Through the PL intensity changes in the single-particle PL spectroscopy, effective interfacial electron transport along the interface of CdS and CuS was observed, which contributes to the significant improvement (i.e., 13.5-fold increase) of photocatalytic H2 production compared to that for pure CdS nanowires. The present study provides visual experimental evidence for understanding restraining of charge carrier recombination in the semiconductor.
Keyphrases
- quantum dots
- visible light
- room temperature
- solar cells
- reduced graphene oxide
- high resolution
- energy transfer
- dna damage
- dna repair
- single molecule
- solid state
- ionic liquid
- computed tomography
- gold nanoparticles
- highly efficient
- magnetic resonance
- molecular dynamics simulations
- mass spectrometry
- high intensity
- electron transfer