A5053440906- Perovskite Materials and Applications
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Organic Electronics and Photovoltaics
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Organic Light-Emitting Diodes Research
- Solid-state spectroscopy and crystallography
- Molecular Junctions and Nanostructures
- Polyoxometalates: Synthesis and Applications
- solar cell performance optimization
- Advanced Thermoelectric Materials and Devices
- Crystallography and molecular interactions
- Thin-Film Transistor Technologies
- TiO2 Photocatalysis and Solar Cells
- Nanowire Synthesis and Applications
- Innovative Energy Harvesting Technologies
- Thermal Radiation and Cooling Technologies
- Semiconductor materials and interfaces
- Advanced Sensor and Energy Harvesting Materials
- Coral and Marine Ecosystems Studies
King Abdullah University of Science and Technology
2018-2024
Swansea University
2013-2020
Physical Sciences (United States)
2018-2019
Kootenay Association for Science & Technology
2018-2019
Bay Institute
2016-2017
Specific Technologies (United States)
2015-2017
Growing perovskite on textured silicon Wide–band gap perovskites could boost the efficiency of solar cells by forming tandem cells, but usually must be grown a smoothed side cell because material rough light-trapping often does not fully coat surface and its texture is prone to phase separation. Hou et al. grew thick films with band ∼1.68 electron volts used passivant, 1-butanethiol, limit The had certified power conversion 25.7% negligible losses after 400 hours operation. Science , this...
To compare and improve solar cells, merely knowing their percent efficiencies is insufficient; we need to be able understand quantify different physical mechanisms of loss. The authors use the reciprocity relation between light absorption emission explore theoretical practical performance limits for emerging technologies based on organics perovskites, them state-of-the-art systems GaAs, c-Si, CIGS. This study indicates potential newer technologies, shows factors that limit present-day performance.
Organolead trihalide perovskite solar cells based upon the co-deposition of a combined Al2O3-perovskite layer at T < 110 °C are presented. We report an average PCE = 7.2% on non-sintered Al2O3 scaffold in devices that have been manufactured from precursor containing 5 wt% nanoparticles.
A humidity resistant and versatile fabrication method for the production of very high quality, organic-inorganic perovskite films, solar cells modules is presented. By using ethyl acetate as an anti-solvent during deposition, with power conversion efficiencies (PCEs) up to 15% were fabricated in a 75% relative (RH) environment. Ethyl acts moisture absorber spin-coating, protecting sensitive intermediate phases from airborne water film formation annealing. We have demonstrated manufacture 50...
Efficient, neutral-colored semitransparent solar cells are of commercial interest for incorporation into the windows and surfaces buildings automobiles. Here, we report on perovskite that both efficient neutral-colored, even in full working devices. Using microstructured architecture previously developed, achieve higher efficiencies by replacing methylammonium lead iodide with formamidinium iodide. Current-voltage hysteresis is also much reduced. Furthermore, apply a novel transparent...
Abstract Sputtered nickel oxide (NiO x ) is an attractive hole‐transport layer for efficient, stable, and large‐area p‐i‐n metal‐halide perovskite solar cells (PSCs). However, surface traps undesirable chemical reactions at the NiO /perovskite interface are limiting performance of ‐based PSCs. To address these issues simultaneously, efficient passivation strategy by using organometallic dye molecule (N719) reported. This concurrently passivates traps, facilitates charge transport....
A self-adhesive laminate solar-cell electrode is presented based on a metal grid embedded in polymer film (x-y conduction) and set contact with the active layer using pressure-sensitive adhesive containing very low quantity (1.8%) of organic conductor, which self-organizes to provide z conduction grid. This ITO-free material performs an identical fashion evaporated gold high-efficiency perovskite solar cells.
Flexible perovskite solar cells with power conversion efficiencies of up to 10.3% have been prepared using titanium foil as an electrode substrate.
The ideality factor determined by measuring the open circuit voltage (VOC) as function of light intensity is often used a means to identify dominant recombination mechanism in solar cells. However, applying this Suns-VOC technique perovskite cells problematic since VOC evolves with time way which depends on previously applied bias (Vpre), intensity, and device architecture/processing. Here we show that two structurally similar CH3NH3PbI3 devices containing either mesoporous Al2O3 or TiO2...
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...
An extremely fast annealing technique for mixed-halide perovskite solar cells is presented. A white light pulse used to crystallise a precursor in 1.15ms compared 90 minutes using conventional hotplate.
Indoor photovoltaics is one of the best sustainable and reliable energy source for low power consumption electronics such as rapidly growing Internet Things. Perovskite photovoltaic (PPV) cells with three benchmark device architectures – mesoporous PPV (mPPV) inverted (iPPV) alternative hole transporting layers (HTLs), carbon‐based (cPPV) are studied under a simulated indoor environment. The mPPV cell using typical Spiro‐OMeTAD HTL shows highest maximum density ( P max ) 19.9 μW cm −2 200...
Abstract Slot‐die (SD) coating is used to fabricate fully solution processed organic solar cells (OSCs) based on a blend of high performance donor polymer (PTB7‐Th) and non‐fullerene acceptor (IEICO‐4F) for stable devices over extended periods operation. The optimization sequential deposition process transport active layers, under ambient conditions, enable efficiency slot‐die coated with remarkable power conversion efficiencies (PCE) > 11.0% bridge the gap between lab‐to‐fab. Fully...
Transient optoelectronic measurements were used to evaluate the factors determining open-circuit voltage of a series planar photovoltaic devices based on hybrid perovskite layers with varying iodine/bromine ratios. Employing differential charging and transient photovoltage measurements, we simple device model charge-carrier-density dependence nongeminate recombination re-create correctly not only measured (VOC) as function light intensity but also its bromine substitution. The 173 (±7) mV...
A rapid annealing technique for CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>perovskite solar cells is presented.
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...
Abstract Solution‐processable halide perovskites have emerged as strong contenders for next‐generation solar cells owing to their favorable optoelectronic properties. To maintain the efficiency momentum of perovskite (PSCs), development advanced processing techniques, particularly layer, is imperative. There a close correlation between quality layer and its photophysical properties: Highly crystalline large grains with uniform morphology interface charge transporters are crucial achieving...
Azetidinium lead iodide has been prepared for the first time; it is a stable, bright orange material that can act as absorber layer in solar cells.
The choice of interfacial materials and their properties play a critical role in determining solar cell performance stability. For compatibility with roll-to-roll printing, it is desirable to develop stable cathode interface layers (CILs) that can be processed over the photoactive layer using orthogonal solvents. In this study, an
Tin–lead perovskite solar cells (TLPSCs) have emerged as one of the most efficient photovoltaic technologies. However, their stability under operational conditions (ambient air, temperature, bias, and illumination) is lagging behind sharp efficiency increase, restraining further development. In this Focus Review, we provide insights into degradation mechanisms tin–lead perovskites summarize principal factors that currently limit TLPSCs. Specifically, composition device architecture stand out...