A5035912216- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Copper-based nanomaterials and applications
- Semiconductor materials and interfaces
- solar cell performance optimization
- Silicon and Solar Cell Technologies
- Advanced Semiconductor Detectors and Materials
- Semiconductor Quantum Structures and Devices
- Perovskite Materials and Applications
- Phase-change materials and chalcogenides
- MXene and MAX Phase Materials
- TiO2 Photocatalysis and Solar Cells
- ZnO doping and properties
- Ferroelectric and Negative Capacitance Devices
- Machine Learning in Materials Science
- Advanced Thermoelectric Materials and Devices
- Gas Sensing Nanomaterials and Sensors
- Thin-Film Transistor Technologies
- Photovoltaic Systems and Sustainability
- Graphene research and applications
- Molecular Junctions and Nanostructures
- Global Energy and Sustainability Research
- Nanowire Synthesis and Applications
- Thermal Radiation and Cooling Technologies
- Quantum and electron transport phenomena
Universitat Politècnica de Catalunya
2020-2025
Institut de Recerca en Energia de Catalunya
2019-2023
FC Barcelona
2021-2023
Carl von Ossietzky Universität Oldenburg
2023
Universitat de Barcelona
2022
Martin Luther University Halle-Wittenberg
2022
The University of Tokyo
2016-2020
Centre National de la Recherche Scientifique
2010-2019
Tokyo University of Science
2013-2015
Chimie ParisTech
2010-2014
ABSTRACT An innovative approach combining chemical etching and a “lift‐off” process, which allows back contact processing after CIGSe deposition, permitted to use Au as highly reflective in ultrathin solar cells. The does not degrade the other parameters of cell, good ohmicity on is achieved. important photocurrent increase compared with regular Mo cells achieved by enhanced light trapping effect due reflector, leading an absolute efficiency +2.5% for thickness 0.4 µm. This could be used...
Abstract In this work, the impacts of surface sulfurization high‐quality Cu(In 1−x ,Ga x )Se 2 (CIGS) thin films deposited by three‐stage process on film properties and cell performance were investigated. The CIGS sulfurized at 550 °C for 30 min using H S gas. X‐ray photoelectron spectroscopy analysis revealed that sulfur atoms diffused into layer valence band minimum was lowered sulfurization. open circuit voltage ( V oc ) drastically increased from 0.590 to 0.674 as a result process....
Kesterite solar cells are at a crossroads, and significant breakthrough in performance is needed for this technology to stay relevant the upcoming years. In work, we propose follow proven strategy of band engineering assist charge carrier collection taking inspiration from chalcopyrite cells. Using process based on combination metallic precursor sputtering chalcogen-reactive annealing, achieve controlled cationic substitutions by partly replacing Sn Ge, hence tailoring several rear gap...
The rising demand for sustainable low‐power devices has driven interest in indoor photovoltaic (IPV) technologies Internet of Things (IoT) applications. Composed earth‐abundant and non‐toxic elements, Kesterite‐based Cu 2 ZnSnS 4 (CZTS) solar cells are highly attractive IPV. This study systematically investigates the effects sodium (Na), lithium (Li), Na–Li co‐doping on solution‐processed CZTS devices. A comprehensive analysis reveals that Na‐doping substantially improves crystallinity grain...
ABSTRACT The present research explores for the first time intricate relationship between sulfurization temperature at unusual high temperatures (up to 700°C) and structural/optoelectronic properties of Cu 2 (Zn,Cd)SnS 4 (CZCTS) thin films, synthesized via a two‐step sequential process involving precursor film deposition using aprotic molecular ink followed by thermal treatment in sulfur atmosphere. X‐ray diffraction patterns confirms tetragonal structure. Scanning Electron Micrographs...
Abstract This paper reports a comparative study of Cu(In,Ga)(S,Se) 2 (CIGSSe) thin‐film solar cells with CBD‐CdS, CBD‐ZnS(O,OH) and ALD‐Zn(O,S) buffer layers. Each layer was deposited on CIGSSe absorber layers which were prepared by sulfurization after selenization (SAS) process Solar Frontier K. Cell efficiencies CBD‐CdS/CIGSSe, CBD‐ZnS(O,OH)/CIGSSe ALD‐Zn(O,S)/CIGSSe exceeded 18%, for cell area 0.5 cm . The underwent heat‐light soaking (HLS) post‐treatment at 170 °C under one‐sun...
Abstract Kesterite semiconductors, derived from the mineral Cu 2 (Zn,Fe)SnS 4 , adopt superstructures of zincblende archetype. This family semiconductors is chemically flexible with possibility to tune physical properties over a large range by modifying chemical composition, while preserving same structural backbone. In simplest case, three metals (e.g. Cu, Zn and Sn) occupy cation sublattice, which gives rise competing orderings (polymorphs) for order–disorder transitions. The rich physics...
Accurate anionic control during the formation of chalcogenide solid solutions is fundamental for tuning physicochemical properties this class materials. Compositional grading key aspect band gap engineering and especially valuable at device interfaces an optimum alignment, controlling interface defects recombination optimizing carrier-selective contacts. However, a simple reliable technique that allows standardizing compositional profiles currently missing kesterites feasibility achieving...
Sb2Se3 is a quasi-one-dimensional (1D) semiconductor, which has shown great promise in photovoltaics. However, its performance currently limited by high Voc deficit. Therefore, it necessary to explore new strategies minimize the formation of intrinsic defects and thus unlock absorber's whole potential. It been reported that tuning Se/Sb relative content could enable selective control defects. Furthermore, recent experimental evidence moderate Se excess enhances photovoltaic performance;...
The influence of Cu(In,Ga)Se2 (CIGSe) surface roughness on the photovoltaic parameters state art devices is reported, highlighting importance as-grown CIGSe absorbers solar cell efficiencies. As-grown progressively smoothed using a chemical etch, and characterized by SEM, AFM, XPS, μ-Raman spectroscopy, x-ray diffraction (XRD), reflectivity. decrease has no marked crystal structure composition absorber. main effect that total reflectivity increases with decreasing roughness. samples are...
Improving the optical management is a key issue for ultrathin based solar cells performance. It can be accomplished either by trapping light in active layer or decreasing parasitic absorptions cell. We calculate absorption of different layers Cu(In,Ga)Se2 (CIGSe) cell and propose to increase CIGSe optimizing three parameters. First, increasing transmitted using textured surface ZnO:Al front contact which functions as broadband antireflection layer. Second, replacing CdS/i-ZnO buffer with...
Quasi‐1D chalcogenides are under the spotlight due to their unique properties for several technological applications including computing, photonic, sensing, and energy conversion. In particular, antimony have recently experienced incredible progresses as emerging photovoltaic materials. Herein, fabrication by a sequential process of Sb 2 Se 3 solar cells is addressed, annealing temperature found be main parameter controlling composition Se‐rich absorbers. Building on this, systematic study...
The electrodeposition of ZnO nanorods on ZnO:Al films with different orientations is reported. influence the total charge exchanged during nanorod's geometry (length, diameter, aspect ratio and surface density) optical transmission properties nanorod arrays studied a {0001}-oriented substrate. are highly vertically oriented along c axis, following lattice matching growth ZnO:Al-oriented substrate axis parallel to leads systematic deviation angle 55° from perpendicular direction. This finding...
Sulfur kesterite (CZTS) solar cells on transparent substrate (FTO) showing <italic>η</italic> = 7.3% and <italic>V</italic><sub>oc</sub> 700 mV (structure: SLG/FTO/Mo (20 nm)/CZTS/Al<sub>2</sub>O<sub>3</sub>/CdS/i-ZnO/ITO) 7.7% 677 nm)/CZTS/CdS/i-ZnO/ITO).
The lack of a systematic definition intermittency in the power sector blurs use this term public debate: same source can be described as stable or intermittent, depending on standpoint authors. This work tackles quantitative adapted to sector, linked nature source, and not current state energy mix production predictive capacity. A indicator is devised, discussed graphically depicted. case study illustrated by analysis 2018 data France then developed further evaluate impact two methods often...