A5033644979- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Silicon and Solar Cell Technologies
- Thin-Film Transistor Technologies
- Silicon Nanostructures and Photoluminescence
- Semiconductor materials and interfaces
- Copper-based nanomaterials and applications
- Icing and De-icing Technologies
- Nonlinear Optical Materials Research
- Surface Modification and Superhydrophobicity
- Photorefractive and Nonlinear Optics
- Phase-change materials and chalcogenides
- Optical and Acousto-Optic Technologies
- Advanced Sensor and Energy Harvesting Materials
- Optical Coatings and Gratings
- Crystal Structures and Properties
- Solid-state spectroscopy and crystallography
Helmholtz-Zentrum Berlin für Materialien und Energie
2018-2021
IMEC
2017-2020
Delft University of Technology
2017-2018
Hasselt University
2018
KU Leuven
2017
This work proposes gallium oxide grown by plasma‐enhanced atomic layer deposition, as a surface passivation material at the CdS buffer interface of Cu(In,Ga)Se 2 (CIGS) solar cells. In preliminary experiments, metal‐insulator‐semiconductor (MIS) structure is used to compare aluminium oxide, and hafnium layers CIGS‐CdS interface. The findings suggest that on CIGS may show density positive charges qualitatively, least trap density. Subsequent cell results with an estimated 0.5 nm substantial...
In this work, metal–insulator–semiconductor structures were fabricated in order to study different types of insulators, namely, aluminum oxide (Al <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> ), silicon nitride, and (SiO <italic xmlns:xlink="http://www.w3.org/1999/xlink"> <sub>x</sub></i> ) be used as passivation layers Cu(In,Ga)Se (CIGS) thin-film solar cells. The investigated...
A study of the electronic conduction mechanisms and electrically active defects in polycrystalline Sb2Se3 is presented. It shown that for temperatures above 200 K, electrical transport dominated by thermal emission free holes, ionized from shallow acceptors, over intergrain potential barriers. In this temperature range, dependence mobility limited barriers, main contributor to observed activation energy conductivity 485 meV. However, at lower temperatures, nearest-neighbor Mott variable...
Liquid‐phase‐crystallized silicon (LPC‐Si) is a bottom‐up approach to creating solar cells with the potential avoid material loss and energy usage in wafer slicing techniques. A desired thickness of (5–40 μm) crystallized line‐shaped source, which laser, herein. The first part reports efforts optimize amorphous contact layers for better surface passivation. second covers laser firing on electron contact. It enables controllable trade‐off between charge collection fill factor (FF) by low...
In this work, we used a solution-processed TiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> layer between Cu ZnSnSe xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> and CdS buffer to reduce the recombination at p-n junction. Introducing showed positive impact on VOC but fill factor efficiency decreased. Using KCN treatment, could create openings in layer, as confirmed by transmission electron microscopy measurements. Formation of...
Reflection losses and soiling of photovoltaic devices are well-known challenges that suppress their full operational potential. Multifunctional self-cleaning light management foils offer a concurrent solution to both subjects. Here we demonstrate simple processing method fabricate lotus leaf textured fluoropolymer foil by nanoimprint lithography hot embossing. We employ nanoimprinted molds for embossing, bypassing the conventional electroforming process enable facile prototyping. Light...
Pure selenide Cu2ZnSnSe4 solar cells were fabricated with a maximum achieved open-circuit voltage (VOC) of 454 mV, which is on par the highest known VOC for this technology (Bourdais et al., Adv. Energ. Mater. 2016, 6). A simple, non-vacuum, spin coating technique was developed introduction alkali ions (Li+, K+, Rb+) before two annealing steps. The presence Rb and Li in particular, observed to reduce recombination bulk increase minority charge carrier decay time. This resulted reduction...
Liquid phase crystallized silicon solar cells on glass have recently demonstrated 15.1% efficiency using a heterojunction interdigitated back contact cell architecture and an absorber thickness of 14 μm. One the key enabling developments was new method to first passivate electron fingers with a-Si:H(i) then locally laser fire them maintain low resistance. In this work, high resolution, light-beam induced current measurements (LBIC) were used analyze approach. Charge collection observed...
Liquid phase crystallized silicon (LPC-Si) solar cells on glass have demonstrated 14.2 % efficiency using a heterojunction interdigitated back contact cell architecture and an absorber thickness of 13 μm. However, losses are incurred in charge collection under the majority carrier regions even after reducing their width to 60 -120 Recently, we developed new method first passivate these fingers with a-Si:H(i) then locally laser-fire them maintain low resistance. High resolution light beam...
Modularly attachable light management and self-cleaning foils are highly desirable for photovoltaic technology. In this work we demonstrate a simple processing method to fabricate lotus leaf textured fluoropolymer by nanoimprint lithography hot embossing. We investigated both, qualities as well properties, comparing with structure random micro-pyramids.Implementation of the foil sun facing airglass interface liquid phase crystalized silicon thin-film solar cells was found increase...