A5051009808- Advanced Photocatalysis Techniques
- Silicon and Solar Cell Technologies
- Nanowire Synthesis and Applications
- Quantum Dots Synthesis And Properties
- Electrocatalysts for Energy Conversion
- Electronic and Structural Properties of Oxides
- Semiconductor materials and devices
- Semiconductor materials and interfaces
- Perovskite Materials and Applications
- ZnO doping and properties
- Thin-Film Transistor Technologies
- Ga2O3 and related materials
- GaN-based semiconductor devices and materials
- Fuel Cells and Related Materials
- Advanced Battery Technologies Research
- solar cell performance optimization
- Hybrid Renewable Energy Systems
- Integrated Circuits and Semiconductor Failure Analysis
- Chalcogenide Semiconductor Thin Films
- TiO2 Photocatalysis and Solar Cells
- Silicon Nanostructures and Photoluminescence
- Nanomaterials for catalytic reactions
- CO2 Reduction Techniques and Catalysts
- Advanced Surface Polishing Techniques
- Copper-based nanomaterials and applications
Australian National University
2016-2024
Canberra (United Kingdom)
2019
Crystalline silicon (c-Si) solar cells have been dominating the photovoltaic (PV) market for decades, and c-Si based photoelectrochemical (PEC) are regarded as one of most promising routes water splitting renewable production hydrogen. In this work, we demonstrate a nanoscale tantalum oxide (TaOx, ∼6 nm) an electron-selective heterocontact, simultaneously providing high-quality passivation to surface effective transport electrons either external circuit or water-splitting catalyst. The PV...
Abstract Realizing solar‐to‐hydrogen (STH) efficiencies close to 20% using low‐cost semiconductors remains a major step toward accomplishing the practical viability of photoelectrochemical (PEC) hydrogen generation technologies. Dual‐absorber tandem cells combining inexpensive are promising strategy achieve high STH at reasonable cost. Here, perovskite photovoltaic biased silicon (Si) photoelectrode is demonstrated for highly efficient stand‐alone solar water splitting. A p + nn ‐Si/Ti/Pt...
Photoelectrochemical (PEC) reduction of CO2 with H2O is a promising approach to convert solar energy and greenhouse gas into value-added chemicals or fuels. However, the exact role structures interfaces photoelectrodes in governing photoelectrocatalytic processes terms both activity selectivity remains elusive. Herein, by systematically investigating InP photocathodes Au–TiO2 interfaces, we discover that nanostructuring can not only enhance photoresponse owing increased light absorption...
The scalable synthesis of highly transparent and robust sub‐monolayers Co 3 O 4 nano‐islands, which efficiently catalyze water oxidation, is reported. Rapid aerosol deposition nanoparticles thermally induced self‐organization lead to an ultra‐fine nano‐island morphology with more than 94% light transmission at a wavelength 500 nm. These demonstrate remarkable mass‐weighted oxidation activity 2070–2350 A g Co3O4 −1 per‐metal turnover frequency 0.38–0.62 s overpotential 400 mV in 1 m NaOH...
Photoelectrolysis of water using solar energy into storable and environment-friendly chemical fuel in the form hydrogen provides a potential solution to address environmental concerns fulfill future requirements sustainable manner. Achieving efficient spontaneous evolution light as only input is highly desirable but difficult target. In this work, we report perovskite cell integrated CdS-based photoanode for unbiased photoelectrochemical evolution. An tandem device consisting mesoporous...
This work demonstrates stoichiometric Ta<sub>2</sub>O<sub>5</sub> ultrathin layer as a novel and efficient electron-selective contact for planar InP heterojunction solar cells achieving an efficiency of 19.1% highest ever reported open circuit voltage 822 mV.
In this work, we report on the photoelectrochemical (PEC) investigation of n-GaN nanopillar (NP) photoanodes fabricated using metal organic chemical vapour deposition and top-down approach. Substantial improvement in photocurrents is observed for GaN NP compared to their planar counterparts. The role carrier concentration dimensions PEC performance further elucidated. Photocurrent density almost doubled doped whereas no noticed undoped photoanodes. While diameter found influence onset...
While photoelectrochemical (PEC) water splitting is a very promising route toward zero-carbon energy, conversion efficiency remains limited. Semiconductors with narrower band gaps can absorb much greater portion of the solar spectrum, thereby increasing efficiency. However, narrow gap (∼1 eV) III–V semiconductor photoelectrodes have not yet been thoroughly investigated. In this study, quaternary alloy InGaAsP demonstrated for first time to great potential PEC splitting, long-term goal...
The research interest in photoelectrochemical (PEC) water splitting is ever growing due to its potential contribute towards clean and portable energy. However, the lack of low energy band gap materials with high photocorrosion resistance primary setback inhibiting this technology from commercialisation. ternary alloy InGaN shows promise meet photoelectrode material requirements chemical stability tunability. can be modulated UV IR regions by adjusting In concentration so as absorb maximum...
Thin SiOx interlayers are often formed naturally during the deposition of transition metal oxides on silicon surfaces due to interfacial reaction. The layer, only several atomic layers thick, becomes interface between Si and deposited oxide can therefore influence electrical properties thermal stability stack. This work explores potential benefits controlling interlayer by introduction pregrown high-quality which also inhibits formation low-quality from metal-oxide process. demonstrates that...
Cadmium sulfide (CdS) is a unique semiconducting material for solar hydrogen generation applications with tunable, narrow bandgap that straddles water redox potentials. However, its potential towards efficient has not yet been realized due to low photon-to-current conversions, high charge carrier recombination and the lack of controlled preparation methods. In this work, we demonstrate highly CdS/TiO2 heterostructured photoelectrode using atomic layer deposition solution ion transfer...
With a band gap close to the Shockley–Quiesser limit and excellent conduction alignment with water reduction potential, InP is an ideal photocathode material for photoelectrochemical (PEC) reduction. Here, we develop facile self-assembled Au nanodots based on dewetting phenomena as masking technique fabricate wafer-scale nanowires (NWs) via top-down approach. In addition, report dual-function wet treatment using sulfur-dissolved oleylamine (S-OA) remove plasma-damaged surface in controlled...
This article presents a comprehensive study regarding the impact of Al electrode on surface passivation three TiO x ‐based passivating selective contacts: :Al/LiF /Al,TiO /LiF /Al, and a‐Si/TiO /Al. A deterioration in is recorded after deposition at close to room temperature, where correlated thickness. thin (10 nm) resulted most severe decline, while samples with 100 nm showed much less deterioration. Furthermore, it found that low‐temperature annealing step led partial recovery...
Titania (TiOx) is re-emerging to be a passivating material for the surfaces of high-efficiency crystalline silicon solar cells. Numerous sources in literature suggest that surface passivation and thermal stability TiOx deteriorates with increasing film thickness when thicker than sufficient thickness. To circumvent this limitation, study presents novel process Al-doped (TiOx:Al) film, which demonstrates potential improved passivation. Based on grazing incident X-ray diffraction UV-Raman...
In article number 2000772, Siva Krishna Karuturi, Heping Shen and co-workers report a perovskite/Si dual absorber tandem cell for stand-alone solar water splitting. An unprecedented over 17% solar-to hydrogen conversion efficiency is achieved when Si photocathode paired in with high bandgap (≈1.75 eV) semitransparent perovskite cell.
This paper reports that current widely used metal electrode aluminum results in dramatic passivation deterioration of some dopant-free passivated contacts (DFPC) (e.g. TiOx/LiFx, a-Si/LiFx and a-Si/TiOx/LiFx) after the Al is deposited on DFPC, which significantly lowers device performance since excellent surface one key requirements for successful integration a full area contact solar cell. More interestingly, we find thickness has significant impact deterioration. A thin (10nm) most severe...
Nanostructured III-V semiconductors are attractive for solar energy conversion applications owing to their excellent light harvesting and optoelectronic properties. Here, we present a protocol scalable fabrication of semiconductor nanopillars using simple cost-effective top-down approach, combining self-assembled random mask plasma etching techniques. We describe the deposition Au/SiO2 layers prepare etch mask. then detail photocathodes. Finally, demonstrate as photoelectrode...
Carrier‐selective contacts offer promising opportunities for solar cells. By alleviating the need p–n junctions and acting as passivation layers, they significantly simplify device design fabrication. Herein, this strategy is applied to a narrow‐bandgap (≈0.91 eV) InGaAsP cell. Such cell, lattice‐matched InP, possesses bandgap ideal bottom subcell of tandem It shown that TiO 2 forms an electron‐selective contact InGaAsP. The /InGaAsP cell exhibits short‐circuit current density 35.2 mA cm −2...
Research into hydrogen generation via photoelectrochemical (PEC) water splitting is ever growing owing to its potential generate clean and portable form of energy. In PEC splitting, a semiconductor absorbs sunlight splits oxygen produce fuel. 1, 2 However, the lack single robust material with narrow bandgap that straddles both redox potentials main barrier develop practical systems. III-V semiconductors can make ideal materials for due their outstanding optoelectronic properties including...