A5082338395- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Advanced Nanomaterials in Catalysis
- Analytical Chemistry and Sensors
- Transition Metal Oxide Nanomaterials
- Electrochemical Analysis and Applications
- Solid-state spectroscopy and crystallography
- ZnO doping and properties
- Electrochemical sensors and biosensors
- Gas Sensing Nanomaterials and Sensors
- Porphyrin and Phthalocyanine Chemistry
- Polyoxometalates: Synthesis and Applications
- Copper-based nanomaterials and applications
- Organic Electronics and Photovoltaics
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Organic Light-Emitting Diodes Research
- Photochemistry and Electron Transfer Studies
- Advanced oxidation water treatment
- Advanced battery technologies research
- Crystal Structures and Properties
Uppsala University
2016-2025
Angstrom Designs (United States)
2015-2019
Division of Chemistry
2018
KTH Royal Institute of Technology
2005-2017
Molecular Devices
2010-2017
Njala University
2016
Centre National de la Recherche Scientifique
2005-2010
Institut des Sciences et Technologies Moléculaires d'Angers
2010
Université d'Angers
2010
Dalian University of Technology
2008-2010
Dye-sensitized solar cells (DSCs) have gained widespread interest because of their potential for low-cost energy conversion. Currently, the certified record efficiency these is 11.1%, and measurements durability stability suggest lifetimes exceeding 10 years under operational conditions. The DSC a photoelectrochemical system: monolayer sensitizing dye adsorbed onto mesoporous TiO(2) electrode, electrode sandwiched together with counter electrode. An electrolyte containing redox couple fills...
Low-toxic bismuth-based perovskites are prepared for the possible replacement of lead perovskite in solar cells. The have a hexagonal crystalline phase and light absorption visible region. A power conversion efficiency over 1% is obtained cell with Cs3 Bi2 I9 perovskite, it concluded that bismuth very promising properties further development
Dye-sensitized solar cells (DSCs) with cobalt-based mediators efficiencies surpassing the record for DSCs iodide-free electrolytes were developed by selecting a suitable combination of cobalt polypyridine complex and an organic sensitizer. The effect steric properties two triphenylamine-based sensitizers series redox on overall device performance in as well transport recombination processes these devices was compared. mass-transport limitations that, previously, have been found to limit...
A novel and efficient polyene-diphenylaniline dye for dye-sensitized solar cells has been synthesized. The a short synthesis route is readily adsorbed on TiO2 under variety of dye-bath conditions. overall solar-to-energy conversion efficiency over 5% in the preliminary tests, comparison with conventional N719 which gives 6% same designed future use also solid state devices, triarylamine based hole conductors.
A series of organic chromophores have been synthesized in order to approach optimal energy level composition the TiO2−dye−iodide/triiodide system dye-sensitized solar cells. HOMO and LUMO tuning is achieved by varying conjugation between triphenylamine donor cyanoacetic acid acceptor. This supported spectral electrochemical experiments TDDFT calculations. These results show that energetic was successful fulfilled thermodynamic criteria for cells, electrical losses depending on size...
Addition of 4-tert-butylpyridine (4TBP) to redox electrolytes used in dye-sensitized TiO2 solar cells has a large effect on their performance. In an electrolyte containing 0.7 M LiI and 0.05 I2 3-methoxypropionitrile, addition 0.5 4TBP gave increase the open-circuit potential 260 mV. Using charge extraction electron lifetime measurements, this increases could be attributed shift band edge toward negative potentials (responsible for 60% voltage increase) (40%). At lower concentration was...
Nanocrystalline particles of ZnO and TiO2 approximately equal size (∼15 nm) were used to prepare mesoporous electrodes for dye-sensitized solar cells. Electron transport in the cells was studied using intensity-modulated photocurrent spectroscopy revealed very similar results TiO2. Apparent activation energies electron nanostructured ≤0.1 eV calculated from temperature dependence times under short-circuit conditions. The lifetime electrons semiconductors evaluated open-circuit voltage decay...
We report on perovskite (CH3NH3)PbI3-sensitized solid-state solar cells using spiro-OMeTAD, poly(3-hexylthiophene-2,5-diyl) (P3HT) and 4-(diethylamino)benzaldehyde diphenylhydrazone (DEH) as hole transport materials (HTMs) with a light to electricity power conversion efficiency of 8.5%, 4.5%, 1.6%, respectively, under AM 1.5G illumination 1000 W/m2 intensity. Photoinduced absorption spectroscopy (PIA) shows that transfer occurs from the (CH3NH3)PbI3 HTMs after excitation (CH3NH3)PbI3. The...
A two-step deposition technique is used for preparing CH3NH3PbI3 perovskite solar cells. Using ZrO2 and TiO2 as a mesoporous layer, we obtain an efficiency of 10.8% 9.5%, respectively, under 1000 W m−2 illumination. The based cell shows higher photovoltage longer electron lifetime than the cell.
Two carbazole-based small molecule hole-transport materials (HTMs) are synthesized and investigated in solid-state dye-sensitized solar cells (ssDSCs) perovskite (PSCs). The HTM X51-based devices exhibit high power conversion efficiencies (PCEs) of 6.0% 9.8% ssDSCs PSCs, respectively. These results superior or comparable to those 5.5% 10.2%, respectively, obtained for the analogous using state-of-the-art Spiro-OMeTAD.
A successful model for the design of efficient dyes p-type dye-sensitized solar cells (DSSCs) is presented. As an example, a novel and organic dye containing triphenylamine chromophore has been synthesized successfully applied in DSSC. The highest incident photon-to-current conversion efficiency (IPCE) 18% visible region obtained, which value so far DSSCs. This remarkably high, considering that only 600 nm thin NiO mesoporous films were used as DSSC electrodes.
A way to achieve a high-efficiency dye-sensitized solar cell is combine an n-type TiO2-based photoanode with p-type photocathode in tandem configuration. The development of efficient is, at present, the key target. We have optimized NiO, I3−/I− p-DSSC system obtain record photocurrent, giving 64% incident photon-to-current conversion efficiency (IPCE) and 5.48 mAcm−2 JSC. Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but...
We report for the first time use of a perovskite (CH3NH3PbI3) absorber in combination with ZnO nanorod arrays (NRAs) solar cell applications. The material has higher absorption coefficient than molecular dye sensitizers, gives better stability, and is therefore more suited as sensitizer NRAs. A efficiency 5.0% was achieved under 1000 W m−2 AM 1.5 G illumination structure: NRA/CH3NH3PbI3/spiro-MeOTAD/Ag. Moreover, shows good long-term stability. Using transient photocurrent photovoltage...
Dye-sensitized solar cells (DSCs) with open-circuit potentials above 1 V were obtained by employing the triphenylamine based organic dye D35 in combination cobalt phenanthroline redox couples. A series of bipyridine and complexes different investigated to examine dependence driving force for recombination regeneration on photovoltaic performance. The photovoltage devices was found increase photocurrent decrease increasing potential complexes. halftime oxidized trisbipyrine about 20 μs,...
Redox mediators play a major role determining the photocurrent and photovoltage in dye-sensitized solar cells (DSCs). To maintain photocurrent, reduction of oxidized dye by redox mediator should be significantly faster than electron back transfer between TiO2 dye. The driving force for regeneration with sufficiently low to provide high photovoltages. With introduction our new copper complexes as promising DSCs both criteria are satisfied enhance power conversion efficiencies. In this study,...
In tandem: Employing a molecular dyad and cobalt-based electrolyte gives threefold-increase in open-circuit voltage (V(OC)) for p-type NiO device (V(OC) = 0.35 V), fourfold better energy conversion efficiency. Incorporating these improvements TiO(2)/NiO tandem dye-sensitized solar cell (TDSC), results TDSC with V(OC) 0.91 V (see figure; CB conductance band, VB valence band).
Mixed ion perovskite solar cells (PSC) are manufactured with a metal‐free hole contact based on press‐transferred single‐walled carbon nanotube (SWCNT) film infiltrated 2,2,7,‐7‐tetrakis(N,N‐di‐p‐methoxyphenylamine)‐9,90‐spirobifluorene (Spiro‐OMeTAD). By means of maximum power point tracking, their stabilities compared those standard PSCs employing spin‐coated Spiro‐OMeTAD and thermally evaporated Au back contact, under full 1 sun illumination, at 60 °C, in N 2 atmosphere. During the 140 h...
Abstract Large datasets are now ubiquitous as technology enables higher-throughput experiments, but rarely can a research field truly benefit from the data generated due to inconsistent formatting, undocumented storage or improper dissemination. Here we extract all meaningful device peer-reviewed papers on metal-halide perovskite solar cells published so far and make them available in database. We collect over 42,400 photovoltaic devices with up 100 parameters per device. then develop...
Several techniques for fabricating functionalized graphene sheet (FGS) electrodes were tested catalytic performance in dye-sensitized solar cells (DSSCs). By using ethyl cellulose as a sacrificial binder, and partially thermolyzing it, we able to create which exhibited lower effective charge transfer resistance (<1 Ω cm2) than the thermally decomposed chloroplatinic acid traditionally used. This was achieved not only triiodide/iodide redox couple, but also two other major mediators used...