A5044619067- Perovskite Materials and Applications
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Organic Electronics and Photovoltaics
- Solid-state spectroscopy and crystallography
- Thin-Film Transistor Technologies
- Hydrocarbon exploration and reservoir analysis
- Copper Interconnects and Reliability
- Geological formations and processes
- Reproductive System and Pregnancy
- Organic Light-Emitting Diodes Research
- Cultural Heritage Materials Analysis
- Gut microbiota and health
- Optical properties and cooling technologies in crystalline materials
- Electrical Fault Detection and Protection
- Distributed and Parallel Computing Systems
- Ginseng Biological Effects and Applications
- Advanced Image Fusion Techniques
- HVDC Systems and Fault Protection
- Target Tracking and Data Fusion in Sensor Networks
- Advanced Photocatalysis Techniques
- Physics of Superconductivity and Magnetism
- E-commerce and Technology Innovations
- Advanced Algorithms and Applications
Nanjing University of Aeronautics and Astronautics
2024-2025
Beijing University of Civil Engineering and Architecture
2022-2025
Guangdong University of Technology
2025
Shanxi Medical University
2024
Hohai University
2024
Shanxi Academy of Medical Sciences
2024
Northwestern Polytechnical University
2023-2024
Harbin Institute of Technology
2024
Yangtze University
2022-2023
Henan Polytechnic University
2021
5 mm-scale large FAPbI 3 single crystals and corresponding photoconductive properties are shown. The phase transition of FAPbI3 between the α-phase δ-phase is studied. carrier mobility 4.4 cm2 V−1 s−1 with a lifetime 484 ns in bulk crystal. Finally, photodetectors based on single-crystal demonstrated.
Compositional engineering has been used to overcome difficulties in fabricating high-quality phase-pure formamidinium perovskite films together with its ambient instability. However, this comes alongside an undesirable increase bandgap that sacrifices the device photocurrent. Here we report fabrication of formamidinium-lead tri-iodide excellent optoelectronic quality and stability. Incorporation 1.67 mol% 2D phenylethylammonium lead iodide into precursor solution enables formation order...
Hybrid perovskites have shown astonishing power conversion efficiencies owed to their remarkable absorber characteristics including long carrier lifetimes, and a relatively substantial defect tolerance for solution-processed polycrystalline films. However, nonradiative charge recombination at grain boundaries limits open circuit voltages consequent performance improvements of perovskite solar cells. Here we address such pathways demonstrate passivation effect through guanidinium-based...
Abstract Perovskite photovoltaics offer a compelling combination of extremely low-cost, ease processing and high device performance. The optoelectronic properties the prototypical CH 3 NH PbI can be further adjusted by introducing other extrinsic ions. Specifically, chlorine incorporation has been shown to affect morphological development perovksite films, which results in improved characteristics for efficiency. However, it requires deep understanding role halide, especially absence...
Perovskite/CIGS tandem cells Tandem solar can boost efficiency by using more of the available spectrum. Han et al. fabricated a two-terminal cell with an inorganicorganic hybrid perovskite top layer and Cu(In,Ga)Se 2 (CIGS) bottom layer. Control roughness CIGS surface use heavily doped organic hole transport were crucial to achieve 22.4% power conversion efficiency. The unencapsulated maintained almost 90% their after 500 hours operation under ambient conditions. Science , this issue p. 904
Thin film photovoltaic cells based on hybrid halide perovskite absorbers have emerged as promising candidates for next generation photovoltaics. Here, we characterized and identified the defect energy distribution in CH3NH3PbI3 using admittance spectroscopy, which reveals a deep state ∼0.16 eV above valence band. According to theoretical calculations, is possibly attributed iodine interstitials (Ii), can become non-radiative recombination centers absorber.
Inorganic metal halide perovskite nanocrystals (NCs) have been employed universally in light-emitting applications during the past two years. Here, blue-emission (≈470 nm) Cs-based NCs are derived by directly mixing synthesized bromide and chloride with a weight ratio of 2:1. High-brightness blue diodes (PeLEDs) obtained controlling grain size films. Moreover, white PeLED is demonstrated for first time blending orange polymer materials as active layer. Exciton transfer from to polymers via...
The precise control of stoichiometric balance and ionic defects on the surface solution-processed perovskite is critical to performance stability solar cells (pero-SCs). Here, we introduce a low-cost stable conjugated donor polymer (PTQ10) as interfacial layer in planar n–i–p structured pero-SCs. was applied intermediate phase before thermal annealing. This treatment significantly reduced loss organic cation during Importantly, kinetics conversion influenced, crystal showed more preferential...
Organic-inorganic hybrid lead halide perovskites have been widely investigated in optoelectronics both experimentally and theoretically. The present work incorporates chemically modified graphene into nanocrystal SnO2 as the electron transporting layer (ETL) for highly efficient planar perovskite solar cells. modification of with conductive two-dimensional naphthalene diimide-graphene can increase surface hydrophobicity form van der Waals interaction between surfactant organic-inorganic...
A formamidinium(FA)-based perovskite showns superior optoelectronic properties including better stability than methylammonium-based counterparts. Pure FA-perovskite-based light-emitting diodes (LEDs) with high efficiency are reported. Interestingly, the LED clearly shows a sub-bandgap emission at 1.7 V (bandgap 2.3 eV). This important discovery provides further insights of charge transport mechanism in perovskite-based devices.
Incorporating narrow-bandgap near-infrared absorbers as the third component in a donor/acceptor binary blend is new strategy to improve power conversion efficiency (PCE) of organic photovoltaics (OPV). However, there are two main restrictions: potential charge recombination narrow-gap material and miscompatibility between each component. The optimized design employ (structurally similar donor or acceptor) with lowest unoccupied molecular orbital (LUMO) energy level acceptor highest occupied...
Abstract Recently, a new type of active layer with ternary system has been developed to further enhance the performance binary organic photovoltaics (OPV). In OPV, almost all layers are formed by simple blend in solution, which eventually leads disordered bulk heterojunction (BHJ) structure after spin‐coating process. There two main restrictions this BHJ obtain higher OPV. One is isolated second donor or acceptor domains. The other invalid metal–semiconductor contact. Herein, concept and...
A facile and quantitative approach has been demonstrated to improve the TiO<sub>2</sub> ETL in perovskite solar cells, with enhanced carrier extraction.
Morphology is critical component to achieve high device performance hybrid perovskite solar cells. Here, we develop a vapor induced intermediate phase (VIP) strategy manipulate the morphology of films. By exposing precursor films different saturated solvent atmospheres, e.g., dimethylformamide and dimethylsufoxide, dramatic film morphological evolution occurs, associated with formation phases. We observe that crystallization kinetics significantly altered due these phases, yielding highly...
Here, we demonstrate an effective low-temperature approach to fabricate a uniform and pinhole-free compact TiO2 layer for enhancing photovoltaic performance of perovskite solar cells. TiCl4 was used modify efficient charge generation significantly reduced recombination loss. We found that with appropriate treatment possesses smooth surface full coverage the conductive electrode. Further studies on carrier dynamics confirmed improves contact TiO2/perovskite interface, facilitating extraction...
In this communication, we report an efficient and flexible perovskite solar cell based on formamidinium lead trihalide (FAPbI3) with simplified configuration. The device achieved a champion efficiency of 12.70%, utilizing direct contact between metallic indium tin oxide (ITO) electrode absorber. underlying working mechanism is proposed subsequently, via systematic investigation focusing the heterojunction within device. A significant charge storage has been observed in perovskite, which...
We have demonstrated high-performance integrated perovskite/bulk-heterojunction (BHJ) solar cells due to the low carrier recombination velocity, high open circuit voltage (VOC), and increased light absorption ability in near-infrared (NIR) region of devices. In particular, we find that VOC devices is dominated by (or pinned to) perovskite cells, not organic photovoltaic cells. A Quasi-Fermi Level Pinning Model was proposed understand working mechanism origin perovskite/BHJ cell, which...
Abstract With the rapid progress in developing hybrid perovskite solar cells, allure of current density–voltage ( J – V ) hysteresis has attracted quite a lot interest research community. It requires feasible approaches that further deepen fundamental understanding device physics specific architecture order to solve this problem eventually. Here, cells configured with different counter electrodes are systematically investigated focus on charge accumulation within devices responsible for...