A5055046428- Perovskite Materials and Applications
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Organic Electronics and Photovoltaics
- Quantum Dots Synthesis And Properties
- Organic Light-Emitting Diodes Research
- Thin-Film Transistor Technologies
- Solid-state spectroscopy and crystallography
- Silicon and Solar Cell Technologies
- Psychotherapy Techniques and Applications
- Psychology, Coaching, and Therapy
- Molecular Junctions and Nanostructures
- Psychosomatic Disorders and Their Treatments
- Psychoanalysis and Social Critique
- Psychiatric care and mental health services
- Advanced Memory and Neural Computing
- Advanced battery technologies research
- Mental Health and Psychiatry
- Magnetic and transport properties of perovskites and related materials
- Crystal Structures and Properties
- Catalysis and Oxidation Reactions
- Semiconductor materials and interfaces
- solar cell performance optimization
- Personality Disorders and Psychopathology
- Analytical Chemistry and Sensors
ZHAW Zurich University of Applied Sciences
2020-2025
École Polytechnique Fédérale de Lausanne
2014-2022
Ludwig-Maximilians-Universität München
2020-2021
University of Lausanne
2015-2020
Charles Humbert 8
2015-2019
Interface (United States)
2015-2019
Laboratoire d'Informatique Fondamentale de Lille
2018
Linköping University
2013-2016
Photonics (United States)
2016
TU Dresden
2008-2015
Today's best perovskite solar cells use a mixture of formamidinium and methylammonium as the monovalent cations. With addition inorganic cesium, resulting triple cation compositions are thermally more stable, contain less phase impurities sensitive to processing conditions. This enables reproducible device performances reach stabilized power output 21.1% ∼18% after 250 hours under operational These properties key for industrialization photovoltaics.
Improving the stability of perovskite solar cells Inorganic-organic have poor long-term because ultraviolet light and humidity degrade these materials. Bella et al. show that coating with a water-proof fluorinated polymer contains pigments to absorb re-emit it in visible range can boost cell efficiency limit photodegradation. The performance inorganic-organic are also limited by size cations required for forming correct lattice. Saliba rubidium cation, which is too small form itself, lattice...
Researchers developed a perovskite solar cell with high power-conversion efficiency (>20%) and intense electroluminescence yield (0.5%).
Ionic displacement modifying the electric field in device is found as most likely reason for hysteresis which examined by separating fast and slow processes comparing devices with without blocking layer.
Planar perovskite solar cells exhibit a conduction band misalignment of the with TiO<sub>2</sub>, but not SnO<sub>2</sub>. The system using latter yielded power conversion efficiencies over 18%.
Abstract Improving the long-term stability of perovskite solar cells is critical to deployment this technology. Despite great emphasis laid on stability-related investigations, publications lack consistency in experimental procedures and parameters reported. It therefore challenging reproduce compare results thereby develop a deep understanding degradation mechanisms. Here, we report consensus between researchers field for testing cell stability, which are based International Summit Organic...
Improvements to perovskite solar cells (PSCs) have focused on increasing their power conversion efficiency (PCE) and operational stability maintaining high performance upon scale-up module sizes. We report that replacing the commonly used mesoporous–titanium dioxide electron transport layer (ETL) with a thin of polyacrylic acid–stabilized tin(IV) oxide quantum dots (paa-QD-SnO 2 ) compact–titanium enhanced light capture largely suppressed nonradiative recombination at ETL–perovskite...
Perovskite solar cells (PSCs) have now achieved efficiencies in excess of 22%, but very little is known about their long-term stability under thermal stress. So far, reports hinted at the importance substituting organic components, attention has been given to metal contact. We investigated state-of-the-art PSCs with exceeding 20%. Remarkably, we found that exposing a temperature 70 °C enough induce gold migration through hole-transporting layer (HTL), spiro-MeOTAD, and into perovskite...
The latest developments in the efficiency and long-term stability of perovskite solar cells are summarized.
Lead halide perovskites have over the past few years attracted considerable interest as photo absorbers in PV applications with record efficiencies now reaching 22%. It has recently been found that not only composition but also precise stoichiometry is important for device performance. Recent reports have, example, demonstrated small amount of PbI2 perovskite films to be beneficial overall performance both standard perovskite, CH3NH3PbI3, well mixed (CH3NH3)x(CH(NH2)2)(1–x)PbBryI(3–y). In...
Low temperature planar PSCs are fabricated by SnO<sub>2</sub> yielding stable devices and efficiencies <italic>ca.</italic> 21%.
Insights into the interplay of different recombination mechanisms and their origins (bulk, surface) are provided comparing fresh, light-soaked aged devices.
Abstract CH 3 NH PbX (MAPbX ) perovskites have attracted considerable attention as absorber materials for solar light harvesting, reaching to power conversion efficiencies above 20%. In spite of the rapid evolution efficiencies, understanding basic properties these semiconductors is still ongoing. One phenomenon with so far unclear origin so-called hysteresis in current–voltage characteristics cells. Here we investigate this a combined experimental and computational approach. Experimentally...
Moving a perovskite into the black The bandgap of α-phase FAPbI 3 (where FA is formamidinium) nearly ideal for solar cells, but it unstable with respect to photoinactive yellow δ-phase. Lu et al. found that film phase was converted highly crystalline by vapor exposure methylammonium thiocyanate at 100°C, and retained this structure after 500 hours 85°C. Solar cells fabricated material had power conversion efficiency more than 23%. After under maximum tracking period dark recovery, 94%...
Perovskite cells benefit from a good night's sleep.
Inorganic‐organic lead‐halide perovskite solar cells have reached efficiencies above 22% within a few years of research. Achieved photovoltages >1.2 V are outstanding for material with bandgap 1.6 eV – in particular considering that it is solution processed. Such values demand low non‐radiative recombination rates and come along high luminescence yields when the cell operated as light emitting diode. This progress report summarizes developments on composition device architecture, which...
The remarkably high open-circuit voltage of methylammonium lead iodide perovskite solar cells is investigated. Both the theoretical maximum and real are predicted from electroluminescence photovoltaic external quantum efficiency spectra. Radiative non-radiative recombination quantified, where a source found in mesoscopic structure, independent Al2O3 or TiO2 scaffold. Without hole-transport layer, strongly enhanced, which reduces voltage.
Abstract Metal halide perovskites have achieved great success in photovoltaic applications during the last few years. The solar to electrical power conversion efficiency (PCE) of perovskite cells has been rapidly improved from 3.9% certified 22.7% due extensive efforts on film deposition methods, composition and device engineering. Further investigation eliminating defect states absorbers is necessary push forward PCE approaching Shockley-Queisser limit. In this review, we summarize...