A5038212004- Thin-Film Transistor Technologies
- Silicon and Solar Cell Technologies
- Silicon Nanostructures and Photoluminescence
- Electrocatalysts for Energy Conversion
- Nanowire Synthesis and Applications
- Advanced Photocatalysis Techniques
- Transition Metal Oxide Nanomaterials
- TiO2 Photocatalysis and Solar Cells
- Copper-based nanomaterials and applications
- Advanced battery technologies research
- Chalcogenide Semiconductor Thin Films
- solar cell performance optimization
- Quantum Dots Synthesis And Properties
- Satellite Image Processing and Photogrammetry
- CO2 Reduction Techniques and Catalysts
- Advanced Semiconductor Detectors and Materials
- Catalysts for Methane Reforming
- Semiconductor materials and interfaces
- Thermal properties of materials
- Semiconductor Quantum Structures and Devices
- Nanofabrication and Lithography Techniques
- ZnO doping and properties
- Historical Geography and Cartography
- Semiconductor materials and devices
- Photonic and Optical Devices
Forschungszentrum Jülich
2015-2024
Stadtwerke Jülich (Germany)
2015-2020
St Petersburg University
2017
Institut für Kälte-, Klima- und Energietechnik
2016
University of Dundee
2008
Abertay University
2002-2006
Physico-Technical Institute
1988-1990
Bias-free solar water splitting is demonstrated using thin film silicon based triple and quadruple junction cells with solar-to-hydrogen efficiencies up to 9.5%.
TiO<sub>2</sub>layer made by e-beam induced evaporation is demonstrated as an ETL in high efficiency planar junction perovskite solar cells.
A major challenge for achieving the energy transition and transforming current model into distributed production is development of efficient artificial leaf devices made earth-abundant materials sustainable fuel production.
Direct solar-to-hydrogen conversion via water splitting was demonstrated in an integrated photovoltaic–electrochemical (PV–EC) device using a hydrogenated amorphous silicon thin film tandem junction (a-Si:H/a-Si:H) solar cell as photocathode. The adapted to provide sufficient photovoltage drive both the hydrogen and oxygen evolution reactions. best results, terms of photoelectrochemical stability performance, were obtained with Ag/Pt layer stack H2 evolving photocathode back contact RuO2...
We present a systematic experimental study on the impact of disorder in advanced nanophotonic light-trapping concepts thin-film solar cells. Thin-film cells made hydrogenated amorphous silicon were prepared imprint-textured glass superstrates. For periodically textured superstrates periods below 500 nm, effect is already superior to state-of-the-art randomly front contacts. The can be associated light coupling leaky waveguide modes causing resonances external quantum efficiency only few...
Abstract ZnO layers with a wide range of surface morphologies were studied for applications in thin film silicon solar cells. The texture layers, achieved by chemical etching, was measured atomic force microscopy (AFM) and statistically analyzed terms the roughness, crater depth, diameter, opening angle. We present method to independently tune lateral vertical dimensions etched structures combined variations layer thickness etching time. optical scattering properties textured are...
We present a stand-alone integrated solar water-splitting device with an active area of 64 cm<sup>2</sup> and long-term stable operation. The modular setup the provides versatile tool to integrate evaluate various combinations photoelectrodes catalysts.
Abstract Reducing the optical losses and increasing reflection while maintaining function of doped layers at back contact in solar cells are important issues for many photovoltaic applications. One approach is to use microcrystalline silicon oxide ( μ c‐SiO x :H) with lower absorption spectral range interest (300 nm 1100 nm). To investigate advantages, we applied :H n ‐layers a‐Si:H single junction cells. We report on comparison between amorphous (a‐Si:H) either or non‐alloyed ‐layers. The...
Silicon (Si) has been investigated as a promising photoelectrode material for use in photoelectrochemical water splitting. However, development of Si photocathodes that can operate at high photocurrent density solar-driven hydrogen production with long-term stability remains challenging. Herein, we report the fabrication inverted pyramid textured p-Si covered conformally and continuously thickness-gradient cobalt phosphide (Co2P) layer, which not only effectively isolates from aqueous...
Abstract N‐type hydrogenated microcrystalline silicon oxide (μc‐SiO x :H) layers were used as window in n‐side illuminated n–i–p solar cells. Optical, electrical and structural properties of μc‐SiO :H films investigated by Photothermal Deflection Spectroscopy, conductivity Raman scattering measurements. prepared over a range carbon dioxide (CO 2 ) flow film thickness, the effects on cell performance investigated. By optimising layer properties, an improved short‐circuit current density 23.4...
This paper reports on the development of phosphorous doped microcrystalline silicon oxide (µc-SiO x :H) films as an emitter window layer in flat p-type heterojunction (SHJ) solar cells featuring intrinsic a-SiO :H buffer layers. We investigated material properties n-type µc-SiO grown at various input gas ratios and correlated results SHJ utilizing varying oxygen content thickness to corresponding film properties. A maximum efficiency 19.0% was achieved. The excellent short circuit current...
Hydrogenated amorphous silicon thin film tandem solar cells (a-Si:H/a-Si:H) have been developed with focus on high open-circuit voltages for the direct application as photocathodes in photoelectrochemical water splitting devices. By temperature variation during deposition of intrinsic a-Si:H absorber layers band gap energy layers, correlating hydrogen content material, can be adjusted and combined a way that a-Si:H/a-Si:H provide up to 1.87 V. The applicability was investigated cell (PEC)...
Abstract
Abstract Hydrogen is regarded as a very important pillar for the future energy supply because it readily available from water and can be used environmentally friendly electricity generation. produced in various ways. Water splitting powered by renewable resources (e. g., solar, wind, etc.) an ideal way of hydrogen generation since this approach achieve true net‐zero carbon dioxide emissions. This review article aimed at giving overview state‐of‐the‐art driven photovoltaics (PVs) on...
Solution‐based semiconductors give rise to the next generation of thin‐film electronics. silicon as a starting material is particular interest because its favorable properties, which are already vastly used in conventional Here, application precursor based on neopentasilane for preparation solar cells reported first time, and, performance similar fabrication methods demonstrated. Because three different functional layers, n‐type contact layer, intrinsic absorber, and p‐type have be stacked...
The behavior of bi- and trilayer coating systems for flexible a-Si:H based solar cells consisting a barrier, an electrode, absorption layer is studied under mechanical load. First, the film morphology, stress, Young's modulus, crack onset strain (COS) were analyzed single coatings various thickness on polyethylene terephthalate (PET) substrates. In order to demonstrate role microstructure whole multilayer coating, two sets InSnOx (indium tin oxide, ITO) conductive prepared. Whereas...
Solar-powered vanadium redox-flow batteries (VRFB) have emerged as an attractive method for large-scale and efficient energy storage conversion. However, due to the stringent charging voltage requirements of vanadium-based systems (1.4–1.7 V), common photobatteries, applying standard photovoltaics with nonoptimized photovoltages, cannot be completely charged bias-free, i.e. by only using bias-free solar energy, or if they can be, at unpractical low current densities just a few mA cm−2. In...
Abstract Thin film silicon based multi-junction solar cells were developed for application in combined photovoltaic electrochemical systems hydrogen production from water splitting. Going single, tandem, triple up to quadruple junctions, we cover a range of open circuit voltages 0.5 V 2.8 at cell (PV) efficiencies above 13%. The with (EC) integrated devices cm 2 64 . Various combinations catalyst pairs the oxygen and evolution reaction side (OER HER) investigated respect activity, stability,...
Hydrogen produced by water electrolysis, and electrochemical batteries are widely considered as primary routes for the long- short-term storage of photovoltaic (PV) energy. At same time fast power ramps idle periods in PV generation may cause degradation splitting (EC) cells. Implementation PV-EC systems is a viable option smoothening out intermittence power. Notably, spreading energy over diurnal cycle reduces EC cell thus its overpotential loss. We study these potential advantages...