A5101973749- Silicon and Solar Cell Technologies
- Advancements in Battery Materials
- solar cell performance optimization
- Extraction and Separation Processes
- Semiconductor materials and interfaces
- Metallurgical Processes and Thermodynamics
- Advanced battery technologies research
- Silicon Nanostructures and Photoluminescence
- Advanced Battery Materials and Technologies
- Metal Extraction and Bioleaching
- Supercapacitor Materials and Fabrication
- Advancements in Semiconductor Devices and Circuit Design
- Semiconductor Quantum Structures and Devices
- Advanced Battery Technologies Research
- Thin-Film Transistor Technologies
- Chalcogenide Semiconductor Thin Films
- Thermal properties of materials
- Thermal Radiation and Cooling Technologies
- Carbon dioxide utilization in catalysis
- Materials Engineering and Processing
- High voltage insulation and dielectric phenomena
- Recycling and Waste Management Techniques
- biodegradable polymer synthesis and properties
- Organometallic Complex Synthesis and Catalysis
- Graphite, nuclear technology, radiation studies
Nankai University
2018-2024
Central South University
2009-2020
UNSW Sydney
1990-2015
ARC Centre of Excellence in Advanced Molecular Imaging
2013
University of Birmingham
2012
Australian National University
2010-2011
Vehicle Technologies Office
2009
Centre de Recherche en Astronomie Astrophysique et Géophysique
1995
The University of Western Australia
1995
Rechargeable aqueous zinc-ion batteries are promising energy storage devices due to their high safety and low cost. However, they remain in infancy because of the limited choice positive electrodes with capacity satisfactory cycling performance. Furthermore, mechanisms not well established yet. Here we report a highly reversible zinc/sodium vanadate system, where sodium hydrate nanobelts serve as electrode zinc sulfate solution additive is used electrolyte. Different from conventional...
The lithium sulfur (Li-S) battery has attracted much attention due to its high theoretical capacity and energy density. However, cycling stability rate performance urgently need improve because of shuttle effect. Herein, oxygen-doped carbon on the surface reduced graphene oxide (labeled as ODC/rGO) was fabricated modify separators Li-S batteries limit dissolution polysulfides. mesoporous structure in ODC/rGO can not only serve physical trapper, but also provide abundant channels for fast ion...
A silicon solar cell structure, PERC (passivated emitter and rear cell), has very recently demonstrated energy conversion efficiency above 23%. number of interesting features the design are discussed. Rear contact is based on a balance between beneficial effects small sparsely spaced points upon open circuit voltage short-circuit current corresponding negative fill factor. The noncontacted regions surface held in weak depletion by an optically isolated but electrically connected Al...
The compressible ZIBs can be compressed arbitrarily under 60% strain and they exhibit stable electrochemical performance different compressive strains.
The radiative recombination coefficient B in crystalline bulk silicon is enhanced by the Coulomb attraction between electrons and holes. This effect hence - reduced at high carrier densities due to screening. We measure numerically calculate as a function of injection density, with gained model we simulate an experiment order extract Coulomb-enhancement Auger recombination.
Rear surface effects in PERL solar cells can lead not only to degradation the short circuit current and open voltage, but also fill factor. Three mechanisms capable of changing effective rear recombination velocity with injection level are identified, two associated oxidised p-type surfaces, third dimensional a floating junction. Each these will degrade factor if range junction biases corresponding transition, coincides maximum power point. Despite identified nonidealities, junctions (PERF...
Abstract SiO 2 ‐passivated Si degrades when exposed to a ‘damp‐heat’ atmosphere of 85% relative humidity and 85 °C. We find the effective surface recombination velocity at /Si interface phosphorus‐diffused (111) increase from 2200 11 000 cm/s after 7 days damp‐heat exposure. This degradation is concern many high‐efficiency solar cells, which are manufactured with facets front surface, must withstand 1000 h exposure during reliability testing. Our experiments indicate that causes (i)...
Recent progress in silicon solar cell research at the University of New South Wales (UNSW) is discussed. In high-efficiency area, effort has been directed further understanding and improving rear surface properties PERL (passivated emitter, locally-diffused) cells. This led to demonstration high energy conversion efficiency 21.5% for a PERT totally-diffused) on an n-type substrate. Possibly most noteworthy results have obtained with hybrid structure which combines laser-grooved,...
The liquid metal flow behaviours in different runner system designs have important effects on the mechanical strength of aluminium alloy castings. In this paper, a new model has been developed which is two-dimensional program using finite difference technique and Marker Cell (MAC) method to simulate during filling mould. Eulerian used for flow, while Oxide Film Entrainment Tracking Algorithm (OFET) (a Lagrangian method) movement oxide film surface or flow. Several examples simulated tested...
The hot carrier cell aims to extract the electrical energy from photo-generated carriers before they thermalize band edges. Hence it can potentially achieve a high current and voltage hence very efficiencies up 65% under 1 sun 86% maximum concentration. To slow rate of thermalisation is challenging, but modification phonon energies use nanostructures are both promising ways some required slowing cooling. A number materials structures being investigated with these properties test fabricated....
This paper reports two near junction structures for n-silicon solar cells. They are respectively rear totally- (PERT) and locally-diffused (PERL) The electrical contacts deployed on both sides of the cells with n- front p- rear, most surface area being passivated by silicon dioxide. A shunt problem in PERL structure, resulting a low fill factor, has been identified solved using different contact characteristics PtSi/p-silicon PtSi/n-silicon. Open-circuit voltages up to 694 mV obtained PERT...
Herein, problems commonly observed for the wet leaching of waste LiFePO4 cathode materials, namely extensive Fe and impurity removal, are mitigated through use NaClO3, effects parameters on Fe, P, Li, Al efficiencies probed. As a result, optimal conditions determined as temperature = 90�C, H2SO4 concentration 1 M, liquid-to-solid ratio 5:1, time h, stirring speed 150 rpm, NaClO3 dosage 25 g per 100 raw material, with corresponding obtained 0.21, 0.03, 97.23 11.87%, respectively.
PECVD SiN <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</sub> antireflection coatings are found to suppress the degradation of an underlying oxide during "damp-heat" exposure. Samples submitted 85°C and 85% relative humidity, replicating damp-heat conditions standard reliability tests for PV modules. The samples diffused with phosphorus passivated a thermal oxide, where resistivity diffusion thickness similar those used in many...
A range of rear surface structures have been developed and studied for the purpose improving performance buried contact solar cells (BCSC). In particular, improved results are reported double grooved BCSC with oxidised p-type surface, V/sub oc/ 685 mV having demonstrated. The importance including an anneal treatment is clearly evident open circuit voltages typically degrading 60 without its inclusion. Devices same structure but a floating junction also evaluated within study again dependence...
The Hot Carrier solar cell reduces carrier thermalisation loss. It relies on slowing the rate of cooling in absorber from ps to ns. This is addressed through nanostructures and modulation phonon dispersions.