Photonic Fano Resonance of Multishaped Cu₂O Nanoparticles on ZnO Nanowires Modulating Efficiency of Hydrogen Generation in Water Splitting Cell

Abstract

The different-shape Cu2O nanostructured in solar water splitting system serves as the photon absorber structure for modulating photoelectric conversion to challenge the issue of the high resistance and low electronic mobility with the different light trapping effect due to the orientation and geometry of Cu2O. Finite difference time domain (FDTD) simulation results demonstrate that the Cu2O nanostructured of truncated octahedral exhibits photonic Fano resonance compared with the other shapes. The generation rate of electrons and holes can rise with truncated octahedral Cu2O nanostructures on the ZnO nanowires. By combining solar water splitting with photonic Fano resonance, we can use a lower voltage 0.7 V (the standard potential of the water electrolysis is −1.23 V) to splitting water, and then separate H2 and O2 into different electrodes. The hydrogen generation rate of truncated octahedral Cu2O can reach 3 × 10–4 ml/s·cm2, which is about 10 times higher than that of Cu2O in other shapes by modulating photonic Fano resonance, which has the potential application in the field of integrated quantum system in the future.

Optical Resonator Enhanced Photovoltaics and Photocatalysis: Fundamental and Recent Progress

“…Many configurations and shapes of metal nanoparticles have been fabricated and studied in photocatalysis. [193,[202][203][204][205] Many factors contribute to photocatalytic performance enhancement, including the formation of local electric field, light absorption enhancement due to SPR, and charge carriers generation improvement. [28] In 2018, Jeong et al demonstrated silver nanoparticles embedded in BiVO 4 nanocomposite photoanode to enhance photocatalytic current densities, as shown in Figure 13a.…”

Cube Cu 2 O modified CoAL‐LDH p‐n heterojunction for photocatalytic hydrogen evolution

“…The Cu 2 O as a p‐type semiconductor was focused on by scientists 22 . It has a wide application in solar cells 23 and photocatalytic hydrogen evolution 24,25 . One reason for choosing CoAl‐LDH was that it had an appropriate band structure that can form a p‐n heterojunction with the Cu 2 O.…”

Gold Nanoparticles on TM:ZnO (TM: Fe, Co) as Spinplasmon-Assisted Electro-Optic Reaction Modulator in Solar-to-Hydrogen Water Splitting Cell

“…The surface plasmon resonance induced hot electrons on the surface with noble metal nanostructures, and the semiconductor could transfer comparable energy, enabling water splitting for the generation of hydrogen. The tuning spectra of light trapping by SPR include the ultraviolet–visible light–near infrared regime. − The spincurrent is able to be generated across the system interface when the applied gold NPs satisfy the conditions of SPR. − This SPR integrates with optical spintronics, bridging the gap of SPR spintronics.…”