A5055149200- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Perovskite Materials and Applications
- Thin-Film Transistor Technologies
- Organic Light-Emitting Diodes Research
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Nanowire Synthesis and Applications
- Analytical Chemistry and Sensors
- Molecular Junctions and Nanostructures
- Semiconductor materials and interfaces
- Spectroscopy Techniques in Biomedical and Chemical Research
- Luminescence and Fluorescent Materials
- solar cell performance optimization
- Nanomaterials and Printing Technologies
- Machine Learning in Materials Science
- Photovoltaic System Optimization Techniques
- Olfactory and Sensory Function Studies
- GaN-based semiconductor devices and materials
- Gas Sensing Nanomaterials and Sensors
- Thermal properties of materials
- Insect and Pesticide Research
- Synthesis and properties of polymers
- Research in Cotton Cultivation
- Advanced Photocatalysis Techniques
King Abdullah University of Science and Technology
2016-2025
University of Oxford
2022
Kootenay Association for Science & Technology
2017-2021
Physical Sciences (United States)
2019-2021
Cyprus University of Technology
2012-2017
University of Cyprus
2013
University of Crete
2013
Foundation for Research and Technology Hellas
2013
University of Patras
2013
MicroLIQUID (Spain)
2009-2012
Molecular doping is often used in organic semiconductors to tune their (opto)electronic properties. Despite its versatility, however, application photovoltaics (OPVs) remains limited and restricted p-type dopants. In an effort control the charge transport within bulk-heterojunction (BHJ) of OPVs, n-type dopant benzyl viologen (BV) incorporated a BHJ composed donor polymer PM6 small-molecule acceptor IT-4F. The power conversion efficiency (PCE) cells found increase from 13.2% 14.4% upon...
Chemical bath deposition (CBD) of tin oxide (SnO2) thin films as an electron-transport layer (ETL) in a planar-heterojunction n–i–p organohalide lead perovskite and organic bulk-heterojunction (BHJ) solar cells is reported. The amorphous SnO2 (a-SnO2) are grown from nontoxic aqueous chloride at very low temperature (55 °C) do not require postannealing treatment to work effectively ETL or BHJ cells, lieu the commonly used materials titanium (TiO2) zinc (ZnO), respectively. Ultraviolet...
Nonfullerene solar cells have increased their efficiencies up to 13%, yet quantum are still limited 80%. Here we report efficient nonfullerene with approaching unity. This is achieved overlapping absorption bands of donor and acceptor that increases the photon strength in range from about 570 700 nm, thus, almost all incident photons absorbed active layer. The charges generated found dissociate negligible geminate recombination losses resulting a short-circuit current density 20 mA cm-2...
Novel p-type semiconducting polymers that can facilitate ion penetration, and operate in accumulation mode are much desired bioelectronics. Glycol side chains have proven to be an efficient method increase bulk electrochemical doping optimize aqueous swelling. One early polymer which exemplifies these design approaches was p(g2T-TT), employing a bithiophene-co-thienothiophene backbone with glycol the 3,3′ positions of bithiophene repeat unit. In this paper, analogous regioisomeric polymer,...
Abstract Recent efforts in the field of organic photodetectors (OPD) have been focused on extending broadband detection into near‐infrared (NIR) region. Here, two blends an ultralow bandgap push–pull polymer TQ‐T combined with state‐of‐the‐art non‐fullerene acceptors, IEICO‐4F and Y6, are compared to obtain OPDs for sensing NIR beyond 1100 nm, which is cut off benchmark Si photodiodes. It observed that TQ‐T:IEICO‐4F device has a superior IR responsivity (0.03 AW ‐1 at 1200 nm −2 V bias) can...
Energy distributions [density-of-states (DOS)] of defects in the effective band gap organic bulk heterojunctions are determined by means capacitance methods. The technique consists calculating junction derivative with respect to angular frequency small voltage perturbation applied thin film poly(3-hexylthiophene) (P3HT) [6,6]-phenyl C61-butyric acid methyl ester (PCBM) solar cells. analysis, which was performed on blends different composition, reveals presence defect bands exhibiting...
Nickel oxide (NiOx) is a promising hole transport layer (HTL) for perovskite solar cells (PSCs), as it combines good chemical stability, high broadband optical transparency, and work function. Excellent power conversion efficiencies (PCEs) have already been reported using solution-processed NiOx. However, solution-based techniques usually require high-temperature postannealing to achieve the required HTL properties of NiOx, which jeopardizes its use many applications, such monolithic tandem...
Thermoelectric (TE) generators that are capable of providing sustainable energy conversion under dynamic mechanical stresses have been explored for realizing autonomous wearable electronics. However, finding extremely deformable, efficient, and air-stable TE materials is still a major challenge. Here, we report highly stretchable efficient organic from aqueous composites poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) ionic liquids (ILs). In this composite, ILs...
The charge-carrier mobility of organic semiconducting polymers is known to be enhanced when the energetic disorder polymer minimized. Fused, planar aromatic ring structures contribute reducing conformational disorder, as demonstrated by containing indacenodithiophene (IDT) repeat unit, which have both a low Urbach energy and high in thin-film-transistor (TFT) devices. Expanding on this design motif, copolymers dithiopheneindenofluorene unit are synthesized, extends fused structure with two...
With chlorinated solvents unlikely to be permitted for use in solution-processed organic solar cells industry, there must a focus on developing nonchlorinated solvent systems. Here we report high-efficiency devices utilizing low-bandgap donor polymer (PffBT4T-2DT) and nonfullerene acceptor (EH-IDTBR) from hydrocarbon without using additives. When mesitylene was used as the solvent, rather than chlorobenzene, an improved power conversion efficiency (11.1%) achieved need pre- or...
An approach to fabricate high-efficiency inverted planar perovskites solar cells using solution-processed organic small molecules hole transporting layer is reported. Devices CH3NH3PbI3 as photoactive and PC60BM electron transport show power conversion efficiencies exceeding 12% open-circuit voltages (VOC) higher than 1 V. As a service our authors readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed may be re-organized for online...
Charge transport layers strongly influence the performance of perovskite solar cells (PSCs). To date, compact and mesoporous scaffolds titanium dioxide have emerged as good electron (ETL), enabling record power conversion efficiencies (PCE). However, these ETLs require sintering above 400 °C, which excludes them from low-temperature applications such flexible devices silicon-heterojunction tandems. Furthermore, instability TiO2 under prolonged exposure to sunlight appears be a critical...
Herein, we report novel triarylamine based hole transporting materials (HTM) with high mobilities for perovskite solar cells.
Efficient homo-tandem and triple-junction polymer solar cells are constructed by stacking identical subcells composed of the wide-bandgap PBDTTPD, achieving power conversion efficiencies >8% paralleled open-circuit voltages >1.8 V. The high-voltage is used to demonstrate PV-driven electrochemical water splitting with an estimated solar-to-hydrogen efficiency ≈6%. As a service our authors readers, this journal provides supporting information supplied authors. Such materials peer reviewed may...
A bilayer of Nb-TiO<sub>2</sub> and bathocuproine forms a highly ohmic contact between wide variety semiconducting materials metal electrodes. This enables performance stability improvements in range electronic devices.
We developed a new non-fullerene acceptor with high responsivity in the near infrared and demonstrated its potential for communication.
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTOne-Step Facile Synthesis of a Simple Hole Transport Material for Efficient Perovskite Solar CellsHu Chen*†, Daniel Bryant‡§, Joel Troughton§, Mindaugas Kirkus†, Marios Neophytou†, Xiaohe Miao†, James R. Durrant‡§, and Iain McCulloch†‡View Author Information† King Abdullah University Science Technology (KAUST), SPERC, Thuwal 23955-6900, Saudi Arabia‡ Department Chemistry Centre Plastic Electronics, Imperial College London, Exhibition Road,...
Tin oxide nanoparticles prepared by microwave-assisted non-aqueous sol–gel were used to cast an electron transporting layer for organohalide perovskite solar cells showing, in average, high efficiencies thanks the good optoelectronic properties of material.
Abstract High fill factors have only recently become commonplace in nonfullerene‐based organic solar cells, with the balance of charge carrier mobilities often cited as contributing factor. Here an end‐group modification to a commonly used nonfullerene acceptor (O‐IDTBR) is reported, which rhodanine end groups are replaced dicyano moieties, resulting O‐IDTBCN. This new affords significant improvement factor (73%) and photocurrent (19.8 mA cm −2 ) cells low bandgap polymer PTB7‐Th. A...
Abstract A simple approach that enables a consistent enhancement of the electron extracting properties widely used small‐molecule Phen‐NaDPO and its application in organic solar cells (OSCs) is reported. It shown addition minute amounts inorganic molecule Sn(SCN) 2 into improves both transport film‐forming properties. Use Phen‐NaDPO:Sn(SCN) blend as layer (ETL) binary PM6:IT‐4F OSCs leads to remarkable increase cells' power conversion efficiency (PCE) from 12.6% (Phen‐NaDPO) 13.5%...
Four solution-processable, linear conjugated polymers of intrinsic porosity are synthesised and tested for gas phase carbon dioxide photoreduction. The polymers' photoreduction efficiency is investigated as a function their porosity, optical properties, energy levels photoluminescence. All successfully form monoxide the main product, without addition metal co-catalysts. best performing single component polymer yields rate 66 μmol h-1 m-2, which we attribute to exhibiting macroporosity...
ABSTRACT Despite the rapid efficiency increase, tin halide perovskite solar cells are significantly behind their lead‐based counterpart, with highest reported of 15.38%. The main reason for this large difference is attributed to instability Sn 2+ , which easily oxidizes 4+ creating vacancies and increasing open‐circuit voltage loss. In work, we implemented thiocyanate (Sn(SCN) 2 ) as an additive passivating bulk defects a germanium‐doped film. Adding SCN − ions reduces iodine vacancies,...
We report an in-depth investigation of inkjet-printed silver (Ag) nanoparticle grid combined with poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) different conductivities as alternative to indium tin oxide (ITO)-based transparent anode for organic solar cell applications. The reported measurements revealed higher transparency the Ag nanoparticle-based when compared thicknesses ITO on glass substrates. Based proposed current collecting grid, a record power conversion...
Efficiencies of organic photovoltaic (OPV) devices have been steadily climbing, but there is still a prominent gap in understanding the relationship between fabrication and performance. Side chain substitution one processing parameter that can change OPV device efficiency considerably, primarily because variations morphology. In this work, we explain morphological link side selection performance polymer to aid development design rules more broadly. We study morphology an active layer using...