A5101465359- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Solid State Laser Technologies
- Chalcogenide Semiconductor Thin Films
- Optical properties and cooling technologies in crystalline materials
- Conducting polymers and applications
- 2D Materials and Applications
- Solid-state spectroscopy and crystallography
- Advanced Photocatalysis Techniques
- Gas Sensing Nanomaterials and Sensors
- Luminescence Properties of Advanced Materials
- TiO2 Photocatalysis and Solar Cells
- Catalytic Processes in Materials Science
- Catalysis for Biomass Conversion
- Acoustic Wave Resonator Technologies
- Advanced Fiber Laser Technologies
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Plasmonic and Surface Plasmon Research
- Random lasers and scattering media
- Nanomaterials for catalytic reactions
- Advanced MEMS and NEMS Technologies
- Photonic and Optical Devices
- Luminescence and Fluorescent Materials
- Gold and Silver Nanoparticles Synthesis and Applications
Chongqing Normal University
2020-2025
Henan Normal University
2024
Chongqing University
2012-2024
Beijing Institute of Technology
2024
Nanjing Tech University
2024
Chifeng University
2024
Hubei Engineering University
2023
Yunnan University
2016-2023
South China University of Technology
2023
Linköping University
2018-2021
Abstract Photodetectors are critical parts of an optical communication system for achieving efficient photoelectronic conversion signals, and the response speed directly determines bandwidth whole system. Metal halide perovskites, emerging class low‐cost solution‐processed semiconductors, exhibiting strong absorption, low trap states, high carrier mobility, widely investigated in photodetection applications. Herein, through optimizing device engineering film quality, high‐performance...
One of the limiting factors to high device performance in photovoltaics is presence surface traps. Hence, understanding and control carrier recombination at organic-inorganic hybrid perovskite critical for design optimization devices with this material as active layer. We demonstrate that rate (or trap state density) methylammonium lead tribromide (MAPbBr3) single crystals can be fully reversibly controlled by physisorption oxygen water molecules, leading a modulation photoluminescence...
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...
On-chip photonic information processing systems require great research efforts toward miniaturization of the optical components. However, when approaching classical diffraction limit, conventional dielectric lasers with all dimensions in nanoscale are difficult to realize due ultimate limit cavity length and extremely high requirement gain overcome loss. Herein, we have succeeded reducing laser size subwavelength scale three using an individual CsPbBr3 perovskite nanocuboid. Even though side...
Abstract The further practical applications of halide perovskite quantum dots (QDs) are blocked by problems instability and nonradiative Auger recombination manifested as photoluminescence blinking. Here, single core/shell structured semiconductor QDs successfully fabricated capping CsPbBr 3 QD core with CdS shell. It is demonstrated that /CdS exhibit ultrahigh chemical stability nonblinking high yield due to the reduced electronic traps within structure. Efficiency amplified spontaneous...
Solution-processed metal halide perovskites (MHPs) have demonstrated great advances on achieving high-performance photodetectors. However, the intrinsic material instability and toxicity of lead still hinder practical applications MHPs-based In this work, first highly sensitive fast-response lead-free perovskite photodetectors based Cs2AgBiBr6 double films are demonstrated. A convenient solution method is developed to deposit high-quality film with large grain sizes, low trap densities, long...
Abstract Current display screens are typically only used for information display, but can have a range of different sensors integrated into them functions such as touch control, ambient light sensing and fingerprint sensing. Photo-responsive light-emitting diodes (LEDs), which respond to excitation, could be develop future ultra-thin large screen-to-body ratio screens. However, photo-response is difficult achieve with conventional technologies. Here, we report multifunctional that uses...
Organic–inorganic lead halide perovskite compounds are very promising materials for high-efficiency solar cells. But how to fabricate high-quality perovksite films under controlled humidity conditions is still an important issue due their sensitivity moisture. In this study, we investigated the influence of ambient on crystallization and surface morphology one-step spin-coated films, as well performance cells based these films. On basis experimental analyses thin film growth theory, conclude...
Abstract Layered halide perovskites have recently shown extraordinary potential for low‐cost solution‐processable optoelectronic applications because of their superior moisture stability over 3D counterparts. However, few studies investigated the effect light on layered hybrid perovskites. Here, mechanically exfoliated nanoflakes 2D perovskite (PEA) 2 PbI 4 (PEA, 2‐phenylethylammonium) are used as a model to investigate intrinsic photostability. The light‐induced degradation flakes is by...
Lead halide perovskites have received much attention in the field of optoelectronic devices. However, environment-unfriendly nature and intrinsic instability these hamper their commercial applications. In this work, one novel one-dimensional lead-free perovskite with high stability, CsCu2I3, was prepared via an antisolvent-assisted crystallization method. The CsCu2I3 bears a exciton binding energy ∼105 meV photoluminescence quantum yield 12.3%. We fabricated deep ultraviolet photodetector...
Organolead trihalide perovskites (OTPs) such as CH3NH3PbI3 (MAPbI3) have attracted much attention the absorbing layer in solar cells and photodetectors (PDs). Flexible OTP devices also been developed. Transparent electrodes (TEs) with higher conductivity, stability, flexibility are necessary to improve performance of flexible devices. In this work, patterned Au nanowire (AuNW) networks high conductivity stability prepared used TEs self-powered MAPbI3 PDs. These PDs show peak external quantum...
The resistance of the perovskite CH3NH3PbI3 film was found to decrease significantly in seconds when exposed an NH3 atmosphere at room-temperature, and recover its original value out environment.
In situ grown nickel sulfide and cobalt hierarchical nanospheres on F-doped SnO2 (FTO) substrates exhibited comparable catalytic activities to sputtering Pt the counter electrodes for dye-sensitized solar cells (DSSCs). The fresh with could reach power conversion efficiencies of 6.81% 6.59% respectively, approaching an efficiency 6.85% based electrode. Both maintain cell's relatively high performance in long-term stability test 504 hours.
Abstract The physical properties of scintillators determine X‐ray detection performance directly, which plays a vital role in computed tomography (CT) imaging for medical radiography and security checks. Recently, lead halide perovskite materials have shown higher photoluminescence quantum yield (PLQY) than conventional scintillators, but there are still some limitations, including instability the use heavy metal lead. In this study, low‐temperature solution method is used to prepare 0D...
Abstract 2D perovskite materials have recently reattracted intense research interest for applications in photovoltaics and optoelectronics. As a consequence of the dielectric quantum confinement effect, they show strongly bound stable excitons at room temperature. Here, band‐edge exciton fine structure particular its biexciton dynamics high quality crystals (PEA) 2 PbI 4 are investigated. A comparison bulk surface lifetimes yields temperature recombination velocity × 10 3 cm s −1 an...
Developing organic semiconductors for short-wavelength infrared (SWIR) photodetectors (OPDs) remains challenging due to the trade-off between achieving a long-wavelength spectral response and high external quantum efficiencies (EQEs) as well low dark current densities (Jd). Herein, two spiro-structural nonfullerene acceptors (NFAs) with responses reaching 1200 nm, namely DPA-4F TPA-4F, were developed. By changing substituent on spiro-core unit from hexyl chain phenyl group, TPA-4F displayed...
Abstract The performance of organic photodetectors (OPDs) sensitive to the short‐wavelength infrared (SWIR) light lags behind commercial indium gallium arsenide (InGaAs) primarily due scarcity semiconductors with efficient photoelectric responses exceeding 1.3 µm. Limited by Energy‐gap law, ultralow‐bandgap usually suffer from severe non‐radiative transitions, resulting in low external quantum efficiency (EQE). Herein, a difluoro‐substituted quinoid terminal group (QC‐2F) exceptionally...
We have developed a facile and compatible method to in situ fabricate uniform metal nanowire networks on substrates. The as-fabricated show low sheet resistance high transmittance (2.2 Ω sq–1 at T = 91.1%), which is equivalent that of the state-of-the-art networks. demonstrated becomes homogeneous from deep-ultraviolet (200 nm) near-infrared (2000 when size wire spacing increases micrometer size. Theoretical experimental analyses indicated we can improve conductivity as well keep their by...
The fiber-shaped dye sensitized solar cell represents a promising flexible power conversion system for next generation wearable electronics due to its facile preparation, lightweight, and good weavability. However, the use of cells is largely limited by their low efficiency flexibility. Herein, Pt-free with high 10.28% fabricated, sequentially growing polyaniline layers Co0.85Se nanosheets on surface carbon fibers as counter electrodes TiO2 nanotubes grown Ti wire photoanode. layer can not...
A high-quality CH3NH3PbI3 film is crucial in the manufacture of a high-performance perovskite solar cell. Here, recrystallization process via facile fumigation with DMF vapor has been successfully introduced to self-repair films poor coverage and low crystallinity prepared by commonly used one-step spin-coating method. We found that dendritic structures can spontaneously transform uniform ones full high adjusting cycles process. The mesostructured cells based on these repaired showed...