A5068179081- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- Quantum Dots Synthesis And Properties
- Perovskite Materials and Applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Conducting polymers and applications
- Advanced Nanomaterials in Catalysis
- Electrochemical sensors and biosensors
- Organic Light-Emitting Diodes Research
- Polyoxometalates: Synthesis and Applications
- Pigment Synthesis and Properties
- Analytical Chemistry and Sensors
- Water Quality Monitoring and Analysis
- Advanced oxidation water treatment
- Electrochemical Analysis and Applications
- Organic Electronics and Photovoltaics
- Advanced battery technologies research
- Crystallography and molecular interactions
- Photochemistry and Electron Transfer Studies
- Copper-based nanomaterials and applications
- Covalent Organic Framework Applications
- Transition Metal Oxide Nanomaterials
Linköping University
2022
KTH Royal Institute of Technology
2014-2020
Stockholm Environment Institute
2016-2017
Dalian University of Technology
2009-2012
Dalian University
2009-2012
Through introducing an energy antenna system into a simple phenoxazine dye (TH301), novel and efficient TH305 was designed synthesized for application in sensitized solar cell with prominent overall conversion efficiency of 7.7%.
Dye-sensitized solar cells have attracted intense academic interest over the past two decades. For a long time, development of new redox systems has fallen far behind that sensitizing dyes and other materials. However, field received renewed attention recently. In particular, in 2011, Grätzel group published record DSC efficiency 12.3% by using Co-complex-based electrolyte. this review, we will provide an overview iodine/iodide-free for liquid electrolytes, reveal design efficient system...
A new strategy in which the anchoring group is separated from acceptor groups of dyes was developed; among these dyes, HY103 dye gives a maximum IPCE value 86% at 660 nm and an eta 3.7% NIR region reported DSCs.
In this work, two Cu(II) complex compounds are designed and synthesized for applications as p-type dopants in solid-state perovskite solar cells (PSCs). Through the characterization of optical electrochemical properties, Cu(bpcm)2 is shown to be eligible oxidization commonly used hole-transport material (HTM) Spiro-OMeTAD. The reason electron-withdrawing effect chloride groups on ligands. When was applied dopant PSCs containing Spiro-OMeTAD HTM, an efficiency high 18.5% achieved. This first...
Blue and green dyes as well NIR-absorbing have attracted great interest because of their excellent ability absorbing the incident photons in red near-infrared range region. A novel blue D−π–A dye (Dyenamo Blue), based on diketopyrrolopyrrole (DPP)-core, has been designed synthesized. Assembled with cobalt bipyridine-based electrolytes, device Dyenamo achieved a satisfying efficiency 7.3% under one sun (AM1.5 G). The co-sensitization strategy was further applied this organic together (D35)....
A new redox couple, [Cu(bpye)<sub>2</sub>]<sup>+/2+</sup>, has been synthesized and applied in DSSCs. Overall efficiencies above 9.0% good photostability were obtained. Excellent electrolyte charge transport, fast regeneration low recombination are the major reasons for high efficiencies.
A one-pot method for encapsulation of dye, which can be applied dye-sensitized solar cells (DSSCs), and synthesis hierarchical porous zeolitic imidazolate frameworks (ZIF-8), is reported. The size the encapsulated dye tunes mesoporosity surface area ZIF-8. mesopore size, Langmuir pore volume are 15 nm, 960–1500 m 2 · g −1 0.36–0.61 cm 3 , respectively. After into ZIF-8, dyes show longer emission lifetimes (greater than 4–8-fold) as compared to corresponding non-encapsulated dyes, due...
An organic dye JY1 bearing a nitro group was designed, synthesized and applied in DSCs. unusual colour change observed when the voltage to device reversed which accompanied by five-fold increase cell efficiency. We propose that applying bias enabled attachment of groups TiO2 surface.
A copper(6,6′-dimethyl-2,2′-bipyridine)<sub>2</sub>]<sup>2+/1+</sup> redox couple was developed as a mediator in dye-sensitized solar cells.
A series of molecularly engineered and novel dyes WS1, WS2, WS3, WS4, based on the D35 donor, 1-(4-hexylphenyl)-2,5-di(thiophen-2-yl)-1H-pyrrole 4-(4-hexylphenyl)-4H-dithieno[3,2-b:2',3'-d]pyrrole as π-conjugating linkers, were synthesized compared to well-known LEG4 dye. The performance was investigated in combination with an electrolyte Co(II/III) complexes redox shuttles. electron recombination between mediators TiO2 interface decreases upon introduction 4-hexylybenzene entities...
Three novel donor–acceptor−π–acceptor-type compounds (WS5, WS6, and WS7) were synthesized investigated in dye-sensitized solar cells (DSSCs) exploring the effect of conjugated linkers on device performance. The new dyes showed strong light-harvesting ability visible region with relatively high molar absorption coefficients (>21 800 M–1 cm–1). This can be attributed to their intrinsic charge transfer (CT) from arylamine acceptor group. Density functional theory (DFT) calculations revealed a...
A new kind of hybrid electrolyte with S2−/Sx2− and I− was invented, the system demonstrated to outperform well-known I−/I3− redox in DSCs. An efficiency 9.1% achieved our lab under AM 1.5 illumination using dye N719, considerably higher than 8.0% I−/I3−-based electrolyte.
A new TEMPO-Co tandem redox system with TEMPO and Co(bpy)3 (2+/3+) has been investigated for the use in dye-sensitized solar cells (DSSCs). large open-circuit voltage (VOC ) increase, from 862 mV to 965 mV, was observed system, while short-circuit current density (JSC maintained. The conversion efficiency increase 7.1 % containing single couple, 8.4 system. reason VOC overall is ascribed involvement of partial regeneration sensitizing dye molecules by TEMPO. This assumption can be verified...
Near-dye experience: Long, flexible carbon chains in the lateral anchoring groups of donor part a donor–π acceptor organic dye increase power conversion efficiency dramatically. This performance enhancement can be ascribed to prevention formation molecular aggregates on semiconductor nanoparticles, resulting lower recombination rate between transported electrons and I3− ions. A cell based new dye, HY113, gives maximum IPCE value 93 % at 660 nm. Detailed facts importance specialist readers...
A new type of electrolyte with a sulfide/polysulfide redox couple and I− was prepared as solvent-free ionic liquid for application in dye-sensitized solar cells, reaching efficiencies 5.2–6.4% under AM 1.5G, 100 mW cm−2 light illumination, 6.6% efficiency obtained 0.1 sun irradiation.
Tandem redox electrolytes, prepared by the addition of a tris(p-anisyl)amine mediator into classic tris(bipyridine)cobalt-based demonstrate favorable electron transfer and reduced energy loss in dye-sensitized solar cells. Here, we have successfully explored three tris(4-alkoxyphenyl)amine mediators with bulky molecular structures generated more effective tandem systems. This series electrolytes rendered cells very high photovoltages exceeding 1 V, which approaches theoretical voltage limit...
The desired attributes of organic photovoltaics (OPV) as a low cost and sustainable energy harvesting technology demand the use non-halogenated solvent processing for photoactive layer (PAL) materials, preferably synthetic complexity (SC) without compromising power conversion efficiency (PCE). Despite their record PCEs, most donor-acceptor conjugated copolymers in combination with non-fullerene acceptors are still far from upscaling due to high SC. Here we present SC ink formulation PAL...
A tandem redox strategy is used in cobalt-based electrolytes. Co(bpy)32+/Co(bpy)33+ offers a high photovoltage at the photoanode, whereas I−/I3− or Fc/Fc+ couples facilitate charge transfer counter electrode. Electron exchange electrolyte beneficial concentration gradients. The overall conversion efficiency improved from 6.5% to 7.5%. Since Grätzel and O'Regan significantly of dye-sensitized solar cells (DSCs) 1991,1 large research efforts have been put towards realization this promising...
Abstract Novel phenoxazine dyes are successfully introduced as sensitizers into dye‐sensitized solar cells (DSCs) with cobalt‐based electrolyte. In triphenylamine (TPA) groups recombination from electrons in the TiO 2 conduction band to cobalt(III) species is suppressed. The effect of steric properties on overall device performance and regeneration processes compared. Optimized DSCs sensitized IB2 having two TPA combination tris(2,2′‐bipyridyl) cobalt(II/III) yield efficiencies 6.3 %,...
A new D-π-A organic dye HY102 with a lateral anchoring group and two reference dyes HY102-1 (using cyanoacrylic acid as an electron acceptor the group) HY102-2 (containing both carboxylic acid) have been synthesized. The optical electrochemical test results from three different styles of photosensitizers show that excited electrons novel most probably are injected into CB TiO2 through moiety close to surface by spatial transfer, not acid. Research photo-induced transfer sensitizers system is...