A5085989973- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Thin-Film Transistor Technologies
- Silicon and Solar Cell Technologies
- Crystallography and molecular interactions
- solar cell performance optimization
- Nanowire Synthesis and Applications
- Organic and Molecular Conductors Research
- Photovoltaic System Optimization Techniques
- Magnetism in coordination complexes
- Organic Light-Emitting Diodes Research
- Porphyrin and Phthalocyanine Chemistry
- Molecular Junctions and Nanostructures
- Supramolecular Chemistry and Complexes
- Nonlinear Optical Materials Studies
- Perovskite Materials and Applications
- Analytical Chemistry and Sensors
- Photochemistry and Electron Transfer Studies
- Molecular Sensors and Ion Detection
- Synthesis and Properties of Aromatic Compounds
- Nanomaterials and Printing Technologies
- Nonlinear Optical Materials Research
- Photodynamic Therapy Research Studies
University of Copenhagen
1988-2024
Aalborg University
1993-2024
University of Southern Denmark
2019
Technical University of Denmark
2009-2018
Aarhus University
2001-2017
John Wiley & Sons (United Kingdom)
2016
Lundbeck (Denmark)
2006-2013
National Institute of Solar Energy
2011
Nordic Laboratory for Luminescence Dating
1998-2009
Danish Gas Technology Centre (Denmark)
2004-2009
Upscaling of the manufacture polymer solar cells is detailed with emphasis on cost analysis and practical approach. The device modules were prepared using both slot-die coating screen printing active layers in form stripes that serially connected. stripe width was varied resultant performance analysed. Wider give access to higher geometric fill factors lower aperture loss while they also present larger sheet resistive losses. An optimum found through preparation connected having widths 9, 13...
A solar park based on polymer cells is described and analyzed with respect to performance, practicality, installation speed, energy payback time. It found that a high voltage where are all printed in series enables an rate Watts installed per minute far exceed any other PV technology existence. The time for the practical of cell foil wooden 250 square meter platform its present form 277 days when operated Denmark 180 southern Spain. de‐installation above 100 m min −1 , which, performance web...
The improvement of the performance roll-to-roll processed polymer solar cell modules through miniaturization device outline is described. devices were prepared using full processing comprising flexographic printing, slot-die coating and rotary screen printing to create 5 mm wide lines ZnO, P3HT:[60/70]PCBM, PEDOT:PSS silver on an ITO-PET substrate. spaced by 1 completed encapsulation lamination both sides a pressure sensitive adhesive multilayered barrier material having UV-filter with...
Inline printing and coating methods have been demonstrated to enable a high technical yield of fully roll-to-roll processed polymer tandem solar cell modules. We demonstrate generality by employing different material sets also describe how the ink systems must be carefully co-developed in order reach ambitious objective printed coated 14-layer flexible stack. The methodologies involved are flexographic printing, rotary screen slot-die coating, X-ray scattering, electrical testing...
A comparative photochemical stability study of a wide range π-conjugated polymers relevant to polymer solar cells is presented. The behavior each material has been investigated under simulated sunlight (1 sun, 1000 W m−2, AM 1.5G) and ambient atmosphere. Degradation was monitored during ageing combining UV-visible infrared spectroscopies. From the comparison collected data, influence chemical structure on its discussed. General rules relative structure–stability relationship are proposed.
Small polymer solar cell modules that are manufactured without indium-tin-oxide using only roll-to-roll printing and coating techniques under ambient conditions enable facile integration into a simple demonstrator (for example laser pointer). Semitransparent front electrode grid structures prepared by inkjet in conjunction with photonic sintering preparation of complete on flexible substrates subsequent the pointer demonstrator. As service to our authors readers, this journal provides...
Abstract Fast inline roll‐to‐roll printing and coating on polyethylene terephthalate (PET) barrier foil was demonstrated under ambient conditions at web speeds of 10 m min −1 for the manufacture indium‐tin‐oxide‐free (ITO‐free) polymer solar cells comprising a 6‐layer stack: silver‐grid/PEDOT:PSS/ZnO/P3HT:PCBM/PEDOT:PSS/silver‐grid. The first second layers were printed same time using processing speed where flexographic hexagonal silver grid comprises layer followed by rotary‐screen...
Semitransparent front electrodes for polymer solar cells, that are printable and roll-to-roll processable under ambient conditions using different approaches, explored in this report. The excellent smoothness of indium-tin-oxide (ITO) has traditionally been believed to be difficult achieve printed grids, as surface topographies accumulate when processing subsequent layers, leading shunts between the top bottom metallic electrodes. Here we demonstrate how aqueous nanoparticle based silver...
Singlet molecular oxygen (a(1)Delta(g)) has been produced and optically detected upon two-photon nonlinear excitation of a sensitizer with focused laser beam. The experiments were performed using toluene solutions either substituted difuranonaphthalene or distyryl benzene as the sensitizer. data indicate that absorption cross sections difuranonaphthalenes are comparatively large depend significantly on functional groups attached to chromophore. time-resolved 1270 nm phosphorescence signals...
The challenges of printing all layers in polymer solar cells from aqueous solution are met by design inks for the electron-, hole-, active-, and metallic back electrode-layers. conversion each layer to an insoluble state after enables multilayer formation same solvent (water). photograph here was taken just before screen silver ink. Utilization sunlight as energy source is one least exploited carbon-neutral methods available today. potential enormous, with a wide range possible applications...
Aqueous nanoparticle dispersions of a series three low-band-gap polymers poly[4,8-bis(2-ethylhexyloxy)benzo(1,2-b:4,5-b′)dithiophene-alt-5,6-bis(octyloxy)-4,7-di(thiophen-2-yl)(2,1,3-benzothiadiazole)-5,5′-diyl] (P1), poly[(4,4′-bis(2-ethylhexyl)dithieno[3,2-b:2′,3′-d]silole)-2,6-diyl-alt-(2,1,3-benzothiadiazole)-4,7-diyl] (P2), and poly[2,3-bis-(3-octyloxyphenyl)quinoxaline-5,8-diyl-alt-thiophene-2,5-diyl] (P3) were prepared using ultrasonic treatment chloroform solution the polymer...
We present a technique that enables the probing of entire parameter space for each with good statistics through simple roll-to-roll processing method where gradients donor, acceptor, and solvent are applied by differentially pumped slot-die coating. thus demonstrate how optimum donor−acceptor ratio device film thickness can be determined improved accuracy varying composition in small steps. give as an example P3HT-PCBM devices vary between P3HT PCBM steps 0.5−1% giving 100−200 individual...
Polymer solar cells were prepared in large numbers using roll-to-roll methods and subsequently integrated into the Organic Electronics Association (OE-A) demonstrator year 2011 presented as a small credit card sized lamp with flat outline. The comprised polymer cell together printed circuitry, discrete components flexible lithium batteries. number of steps required for manufacture was 35 more than 10 000 units manufactured. We describe efforts towards increasing technical yield which 89%...
We present a cost analysis based on state of the art printing and coating processes to fully encapsulated, flexible ITO- vacuum-free polymer solar cell modules. Manufacturing data for both single junctions tandem are presented analyzed. Within this calculation most expensive layers processing steps identified. Based large roll-to-roll experiments exact material consumptions were determined. In addition pilot scale experiment here, projections medium scenarios serve as guide achieve targets 5...
Singlet molecular oxygen (a(1)Delta(g)) has been produced and optically detected in time-resolved experiments upon nonlinear two-photon excitation of a photosensitizer dissolved water. For given sensitizer, specific functional groups that impart water solubility give rise to larger absorption cross sections are, many cases, not conducive the production singlet high yield. This issue involves competing influence intramolecular charge transfer can be pronounced aqueous systems; more...
With the development of patterns that connect all cells in series, organic photovoltaics have leapt a step forward being ahead other solar and even energy technologies terms manufacturing speed density. The important questions how they are meant to be installed for producing power what requirements yet explored. We present here installation cell modules different settings (terrestrial, marine airborne). For evaluation these installations deployed at DTU, we used life cycle assessment tools,...
The investigation of degradation seven distinct sets (with a number individual cells n ≥ 12) state the art organic photovoltaic devices prepared by leading research laboratories with combination imaging methods is reported. All have been shipped to and degraded at Risø DTU up 1830 hours in accordance established ISOS-3 protocols under defined illumination conditions. Imaging device function different stages was performed laser-beam induced current (LBIC) scanning; luminescence imaging,...