Hybrid p-Au@PbI2/n-Si heterojunction photodetector prepared by pulsed laser ablation in liquid

Mousa, Ali M.; Ismail, Raid A.; Amin, Mustafa H.

doi:10.1016/j.ijleo.2019.02.153

Cited by 16 publications

(3 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, under zero applied bias (0 V), the Au/ZnO photoanode shows J ph = 0.47 mA/cm 2 , suggesting high water oxidation activity without any support from an external electrical potential source. These results indicate that the coating of Au NPs on ZnO NRs plays a positive role in improving the performance of the photoelectrode, enhances the electrical and optical properties of the ZnO samples, and exhibits enhanced J ph values [ 83 , 84 ]. Au NPs have many significant ways of enhancing PEC performance.…”

Section: Resultsmentioning

confidence: 99%

Effect of Morphology and Plasmonic on Au/ZnO Films for Efficient Photoelectrochemical Water Splitting

et al. 2021

View full text Add to dashboard Cite

To improve photoelectrochemical (PEC) water splitting, various ZnO nanostructures (nanorods (NRs), nanodiscs (NDs), NRs/NDs, and ZnO NRs decorated with gold nanoparticles) have been manufactured. The pure ZnO nanostructures have been synthesized using the successive ionic-layer adsorption and reaction (SILAR) combined with the chemical bath deposition (CBD) process at various deposition times. The structural, chemical composition, nanomorphological, and optical characteristics have been examined by various techniques. The SEM analysis shows that by varying the deposition time of CBD from 2 to 12 h, the morphology of ZnO nanostructures changed from NRs to NDs. All samples exhibit hexagonal phase wurtzite ZnO with polycrystalline nature and preferred orientation alongside (002). The crystallite size along (002) decreased from approximately 79 to 77 nm as deposition time increased from 2 to 12 h. The bandgap of ZnO NRs was tuned from 3.19 to 2.07 eV after optimizing the DC sputtering time of gold to 4 min. Via regulated time-dependent ZnO growth and Au sputtering time, the PEC performance of the nanostructures was optimized. Among the studied ZnO nanostructures, the highest photocurrent density (Jph) was obtained for the 2 h ZnO NRs. As compared with ZnO NRs, the Jph (7.7 mA/cm2) of 4 min Au/ZnO NRs is around 50 times greater. The maximum values of both IPCE and ABPE are 14.2% and 2.05% at 490 nm, which is closed to surface plasmon absorption for Au NPs. There are several essential approaches to improve PEC efficiency by including Au NPs into ZnO NRs, including increasing visible light absorption and minority carrier absorption, boosting photochemical stability, and accelerating electron transport from ZnO NRs to electrolyte carriers.

show abstract

Section: Resultsmentioning

confidence: 99%

Effect of Morphology and Plasmonic on Au/ZnO Films for Efficient Photoelectrochemical Water Splitting

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The technique used for core-shell is competitive, inexpensive, and suitable for the fabrication of high-performance photodetectors. 2.74 at 920 nm 5.52 × 10 11 at 920 nm -CuO@CuS/Si [38] 0.79 8.11 × 10 11 3.09 × 10 2 Au@PbI 2 /Si [39] 0.39 at 800 nm 4 × 10 12 at 800 nm 6.04 at 800 Fe 3 O 4 @TiO 2 /Si [Current work] 0.5 at 400 nm 1.9 × 10 11 at 400 nm 1.5 × 0 2 at 400 nm…”

Section: Discussionmentioning

confidence: 99%

Photodetection properties of populated Fe3O4@TiO2 core–shell/Si heterojunction prepared by laser ablation in water

2021

Self Cite

View full text Add to dashboard Cite

In this work, we demonstrated the first study on the preparation and characterization of the populated Fe 3 O 4 @TiO 2 coreshell/Si photodetector by laser ablation in liquid. The structural and optical properties of Fe 3 O 4 nanoparticles and Fe 3 O 4 @ TiO 2 core-shell nanoparticles were studied by X-ray diffraction, transmission electron microscope, and UV-Vis absorption. X-ray diffraction findings suggest the formation of a populated crystalline Fe 3 O 4 @TiO 2 core-shell through the existence of XRD peaks related to TiO 2 and Fe 3 O 4 . The optical properties revealed that the optical energy gap of Fe 3 O 4 @TiO 2 was 3 eV, while the optical energy gap of Fe 3 O 4 was 2.8 eV. Raman studies reveal the presence of vibration modes centered at 91 cm −1 (E g ), 144 cm −1 (E g ), 396 cm −1 (B 1g ), 512 cm −1 (B 1g ), 541 cm −1 (B 1g + A 1g ), and 609 cm −1 (E g ) which are belong to the TiO 2 . The vibration modes related to the magnetite Fe 3 O 4 are observed at 145 -1 (T 2g ), 302 cm −1 (T 2g ), and 554 cm −1 (T 1g ). Transmission electron microscope results suggest the presence of a core-shell morphology with an average size of 60 nm. The current-voltage characteristics of Fe 3 O 4 /p-Si and Fe 3 O 4 @TiO 2 core-shell/p-Si photodetectors are measured in the dark and under illumination conditions. The maximum responsivity of the Fe 3 O 4 @TiO 2 /Si photodetector was 0.5A/W at 400 nm, while the maximum responsivity of Fe 3 O 4 /p-Si photodetector was 0.4A/W at 500 nm. The specific detectivity and external quantum efficiency of the Fe 3 O 4 @TiO 2 /p-Si photodetector are larger than those of Fe 3 O 4 /p-Si photodetector.

show abstract

“…Furthermore, it can be noticed that, when the Si substrate was sprayed by Ni at a distance of 25 cm, it showed good rectifying behavior under dark and illumination conditions. This is related to the large width of the depletion layer, large grain size, and a high degree of stoichiometry [51], also, the increase of crystal size gives chance to the reduction of the scattering process by charge carriers [52]. Moreover, the rising of photocurrent with the augmentation of voltage value is due to the rising in carrier drift velocity [53].…”

Section: Current-voltage Characteristicsmentioning

confidence: 99%

Influence of the distance between nozzle and substrate on the structural, photoluminescence, and detector characteristics of p-NiO/n-Si hetero-junction deposited by spray pyrolysis method

2022

View full text Add to dashboard Cite

In the present investigation, p-NiO has been deposited on n-Si (100) substrate by the spray pyrolysis method. The effect of the distance between the substrate and the nozzle on the structural, photoluminescence, and detection properties has been well inspected. XRD analysis proved the polycrystalline system with a cubic structure for NiO. The elemental analysis con rmed the existence of Ni, O, and Si materials without any impurities. The FESEM analysis showed nano and micro particles distributed on the Si layer, the micro particles have porous like structures which play a signi cant role as photons guider. The photoluminescence measurement depicted three main peaks at the UV and visible regions of the electromagnetic spectrum which are related to near band edge emission and defects within the crystal, respectively. I-V characteristics revealed good conductivity under UV illumination, and the highest current was recorded by a sample when the distance between the nozzle and the substrate is 25 cm. The responsivity elucidated a high value at UV region with 6.5 mA/W, and the current-time properties demonstrated good reproducibility, high stability and photoresponse, and rapid response and recovery times of 0.375 and 0.791 s, respectively at a lower bias voltage of 1.5 Volt under UV photons source.

show abstract

Hybrid p-Au@PbI2/n-Si heterojunction photodetector prepared by pulsed laser ablation in liquid

Cited by 16 publications

References 33 publications

Effect of Morphology and Plasmonic on Au/ZnO Films for Efficient Photoelectrochemical Water Splitting

Effect of Morphology and Plasmonic on Au/ZnO Films for Efficient Photoelectrochemical Water Splitting

Photodetection properties of populated Fe3O4@TiO2 core–shell/Si heterojunction prepared by laser ablation in water

Influence of the distance between nozzle and substrate on the structural, photoluminescence, and detector characteristics of p-NiO/n-Si hetero-junction deposited by spray pyrolysis method

Contact Info

Product

Resources

About