A5026812495- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Conducting polymers and applications
- Solid-state spectroscopy and crystallography
- Organic Light-Emitting Diodes Research
- Luminescence Properties of Advanced Materials
- ZnO doping and properties
- 2D Materials and Applications
- Organic Electronics and Photovoltaics
- Gas Sensing Nanomaterials and Sensors
- Optical properties and cooling technologies in crystalline materials
- Thermal properties of materials
- Advanced Photocatalysis Techniques
- Organic and Molecular Conductors Research
- Ga2O3 and related materials
- Radiation Detection and Scintillator Technologies
- High-Temperature Coating Behaviors
- Acoustic Wave Resonator Technologies
- Electronic and Structural Properties of Oxides
- Glass properties and applications
- Fullerene Chemistry and Applications
- Technostress in Professional Settings
- High Entropy Alloys Studies
- Transition Metal Oxide Nanomaterials
Shanghai Advanced Research Institute
2021-2025
Chinese Academy of Sciences
2009-2025
Shanghai Institute of Applied Physics
2017-2024
University of Chinese Academy of Sciences
2016-2024
Shanghai Institute of Optics and Fine Mechanics
2022
Linköping University
2020-2021
Peking University
2016-2019
Institute of Semiconductors
2009
Halide perovskites with reduced-dimensionality (e.g., quasi-2D, Q-2D) have promising stability while retaining their high performance as compared to three-dimensional counterpart. Generally, they are obtained in (A1)2(A2)n−1PbnI3n+1 thin films by adjusting A site cations, however, the underlying crystallization kinetics mechanism is less explored. In this manuscript, we employed ternary cations halides perovskite (BA)2(MA,FA)3Pb4I13 Q-2D an archetypal model, understand principles that link...
Abstract Bright and efficient blue emission is key to further development of metal halide perovskite light-emitting diodes. Although modifying bromide/chloride composition straightforward achieve emission, practical implementation this strategy has been challenging due poor colour stability severe photoluminescence quenching. Both detrimental effects become increasingly prominent in perovskites with the high chloride content needed produce emission. Here, we solve these critical challenges...
Minimization of defects in absorber materials is essential for hybrid perovskite solar cells, especially when constructing thick polycrystalline layers a planar configuration. Here, simple methylamine solution-based additive reported to improve film quality with nearly an order magnitude reduction intrinsic defect concentration. In the resultant film, increase carrier lifetime as result decrease shallow electronic disorder observed. This superior crystalline further evidenced via doubled...
Crystal orientations in multiple orders correlate to the properties of polycrystalline materials, and it is critical manipulate these microstructural arrangements enhance device performance. Herein, we report a controllable approach facet orientation within ABX3 hybrid perovskites films by cation cascade doping at A-site. Two-dimensional synchrotron radiation grazing incidence wide-angle X-ray scattering employed probe crystal mixed thin films, revealing general pattern guide planes stacking...
A pre-embedding mixed A-cation halide strategy is developed to eliminate the residual unstable PbI 2 and lattice strain near buried interface of perovskite layer for stability improvement formamidinium-based solar cells.
Abstract Tin halide perovskites have the general chemical formula ASnX 3 , where A is a monovalent cation and X anion. These semiconducting materials can be used to fabricate p-type transistors at low cost temperature could potentially integrated with n-type oxide-based create complementary circuits. However, suffer from crystallization controllability high film defect density, resulting in uncompetitive device performance. Here we show that pure-tin perovskite thin-film created using triple...
Compositional heterogeneity is commonly observed in mixed bromide/iodide perovskite photoabsorbers, typically with minimal effects on charge carrier recombination and photovoltaic performance. Consistently, it has so far received very limited attention bromide/chloride-mixed perovskites, which hold particular significance for blue light-emitting diodes. Here, we uncover that even a minor degree of localized halide leads to severe non-radiative losses bromide/chloride emitters, presenting...
Wide-bandgap (WBG) absorbers in tandem configurations suffer from poor crystallinity and weak texture, which leads to severe mixed halide-cation ion migration phase segregation during practical operation. We control WBG film growth insensitive compositions by nucleating the 3C before any formation of bromine-rich aggregates 2H phases. The resultant show improved strong texture with suppressed nonradiative recombination enhanced resistance various aging stresses. Perovskite/silicon solar...
Post-thermal annealing and <italic>in situ</italic> doping are adopted to tune the physical properties of PLD-NiO films.
Organic–inorganic halide perovskite has received extensive attention as a light harvester for next‐generation low‐cost and high‐performance photovoltaics. Its superior optoelectronic properties are attractive among most thin film absorber materials, such an extremely high absorption coefficient, optimal band gap, ambipolar carrier transport property, defects tolerance. However, it requires suitable electrodes materials to fulfill efficient photovoltaic process within entire device. Thus, the...
Engineering the chemical composition of organic and inorganic hybrid perovskite materials is one most feasible methods to boost efficiency solar cells with improved device stability. Among diverse family ABX3, formamidinium (FA)-based mixed (e.g., FA1−xCsxPbI3) possesses optimum bandgaps, superior optoelectronic property, as well thermal- photostability, which proven be promising candidate for advanced cell. Here, FA0.9Cs0.1PbI3(Cl) implemented light-harvesting layer in planar devices,...
Crystal orientation has a great impact on the properties of perovskite films and resultant device performance. Up to now, exquisite control crystal (the preferred crystallographic planes stacking mode with respect particular planes) in mixed-cation perovskites received limited success, underlying mechanism that governs performance is still not clear. Here, thermodynamically favored formamidinium/methylammonium (FA/MA) finely tuned by composition engineering. Density functional theory...
Abstract Although perovskite light-emitting diodes (PeLEDs) have recently experienced significant progress, there are only scattered reports of PeLEDs with both high efficiency and long operational stability, calling for additional strategies to address this challenge. Here, we develop perovskite-molecule composite thin films efficient stable PeLEDs. The consist in-situ formed high-quality nanocrystals embedded in the electron-transport molecular matrix, which controls nucleation process...
Abstract Molecular additives are widely utilized to minimize non-radiative recombination in metal halide perovskite emitters due their passivation effects from chemical bonds with ionic defects. However, a general and puzzling observation that can hardly be rationalized by alone is most of the molecular enabling high-efficiency light-emitting diodes (PeLEDs) chelating (multidentate) molecules, while respective monodentate counterparts receive limited attention. Here, we reveal largely...
A solvent-free solid-phase technique was developed for the targeted defect passivation of perovskite films, resulting in an ultra-high PCE 25.2%.
Recently, perovskite/Si devices have attracted enormous interest as an ideal technology for tandem cells, particularly due to the attributes from perovskite cell including low temperature processibility, tunable optical bandgap, and high open circuit voltage. Although solution process is considered be cost effective more widely adoptable subcell, best of our knowledge, there has been no successful demonstration resulting performance two‐terminal cells. In this manuscript, employed fabricate...
Tailored Au@TiO<sub>2</sub> nanostructures successfully enhance the efficiency of planar perovskite solar cells.
A hybrid perovskite memory device with a decent set voltage has been successfully demonstrated, and the performance was correlated to defect density hysteresis-index of different films.
Preoptimizing perovskite films may generally improve the performance of final solar cells (PSCs). However, research on whether film optimization fully contributes to enhancement PSCs has been long neglected. We demonstrated that preparation metal electrodes by high-vacuum thermal evaporation, an unavoidable step in almost all device fabrication processes, will damage surface films, resulting component escape, defect density rebound, carrier extraction barrier, and stability deterioration....
The promising rubrene-based PSC device performance demonstrates the potential of rubrene as a suitable hole transport material in PSCs due to an optimal energy level alignment at rubrene/CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> interface.