A5100462386- Perovskite Materials and Applications
- Organic Light-Emitting Diodes Research
- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Quantum Dots Synthesis And Properties
- Electrocatalysts for Energy Conversion
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Chalcogenide Semiconductor Thin Films
- Solid State Laser Technologies
- Thin-Film Transistor Technologies
- Advanced battery technologies research
- Neural Networks and Reservoir Computing
- Photorefractive and Nonlinear Optics
- Advanced Photocatalysis Techniques
- 2D Materials and Applications
- Semiconductor Quantum Structures and Devices
- Electrochemical Analysis and Applications
- Nanowire Synthesis and Applications
- Quantum Information and Cryptography
- Solid-state spectroscopy and crystallography
- Supercapacitor Materials and Fabrication
- Laser Design and Applications
- Luminescence and Fluorescent Materials
- Optical Network Technologies
Northwestern Polytechnical University
2024-2025
Beijing Jiaotong University
2020-2024
University of Copenhagen
2020-2024
Kyung Hee University
2024
South China University of Technology
2011-2023
Shanghai Electric (China)
2023
Electric Power Research Institute
2023
Jinan University
2015-2022
Southeast University
2004-2022
Energy Research Institute
2020-2022
Quasi-2D perovskites have long been considered to favorable "energy funnel/cascade" structures and excellent optical properties compared with their 3D counterparts. However, most quasi-2D perovskite light-emitting diodes (PeLEDs) exhibit high external quantum efficiency (EQE) but unsatisfactory operating stability due Auger recombination induced by current density. Herein, a synergetic dual-additive strategy is adopted prepare films low defect density environmental using 18-crown-6...
Pure-red perovskite LEDs (PeLEDs) based on CsPb(Br/I)3 nanocrystals (NCs) usually suffer from a compromise in emission efficiency and spectral stability account of the surface halide vacancies-induced nonradiative recombination loss, phase segregation, self-doping effect. Herein, "halide-equivalent" anion benzenesulfonate (BS- ) is introduced into NCs as multifunctional additive to simultaneously address above challenging issues. Joint experiment-theory characterizations reveal that BS- can...
Abstract Environmental stability of perovskite solar cells (PSCs) has been improved by trial-and-error exploration thin low-dimensional (LD) deposited on top the absorber, called capping layer. In this study, a machine-learning framework is presented to optimize We featurize 21 organic halide salts, apply them as layers onto methylammonium lead iodide (MAPbI 3 ) films, age under accelerated conditions, and determine features governing using supervised machine learning Shapley values. find...
CoP/Mo 2 CT x is prepared as efficient catalyst for HER, OER, and water splitting. DFT calculations revealed that it has optimal H* adsorption free energy MXene plays a critical role to boost while CoP transformed into Co–OOH in OER.
We report a facile approach to construct Co@NiFe-LDH heterostructure catalyst with superior OER and Zn–air performance. DFT calculations revealed that Fe site is the active center, while forming upshifts d-band center.
A key debate involving mixed-cation lead mixed-halide perovskite thin-films relates to the effects of process conditions on film morphology and local performance solar cells. In this contribution, we investigate influence precursor concentration thickness, grain size, orientation these polycrystalline thin-films. We vary molar containing Rb, Cs, MA, FA, Pb, I, Br from 0.4 1.2 M. use optical electrical probes measure properties correlate effect crystallographic inter- intragrain...
Abstract Quasi‐2D perovskites show great promise for light‐emitting diodes owing to suppressed non‐radiative losses enabled by the energy funneling/cascading nanostructures. However, red emission quasi‐2D perovskites, these ideal landscapes efficient perovskite (PeLEDs) can rarely be achieved due detrimental aggregation of low‐dimensional ligands in precursors, leading poor device efficiency and stability. Here, a ligand‐modulated dimensionality control strategy is explored achieve uniform...
We report continuous-wave laser operation at 698 nm in Pr3+-doped LiYF4 crystal using an InGaN diode emitting 444 with a maximum output power of 760 mW. By suppressing the oscillation 640 and 721 nm, 156 mW was obtained single transverse mode slope efficiency as high 48.7%. The beam quality factors M2 x y directions were measured to be 1.4 1.2, respectively.
A semitransparent polymer solar cell using a bottom one-dimensional photonic crystal and top solution-processed highly conductive PEDOT:PSS layer.
Abstract The band‐edge electronic structure of lead halide perovskites ( ABX 3 ) is composed the orbitals B and X components can be tuned through composition BX 6 octahedron. Although A‐site cations do not directly contribute to near‐edge states, bandgap 3D metal affected by A‐cations octahedron tilting or lattice size variation. Here, as confirmed Rietveld refinement results X‐ray diffraction characterization, competition between expansion octahedral identified for first time in emission...
We demonstrate a kind of perovskite/organic hybrid white electroluminescent device, where an ultrathin doping-free organic phosphorescent interlayer is embedded between p-type hole transport layer and n-type electron to give p–i–n heterojunction unit, which superimposed by onto quasi-two-dimensional perovskite layer. The unique carrier character the leads broad recombination region approaching unit. As result, pure-red emission from sky-blue were simultaneously achieved generate with peak...
Although tremendous progress has recently been made in quasi-2D perovskite light-emitting diodes (PeLEDs), the performance of red PeLEDs emitting at ≈650-660 nm, which have wide prospects for application photodynamic therapy, is still limited by an inefficient energy transfer process between layers. Herein, a symmetric molecule 3,3'-(9H-fluorene-9,9-diyl)dipropanamide (FDPA) designed and developed with two functional acylamino groups incorporated into perovskites as additive achieving...
Needle-like and flower-like antimony sulfide nanostructures were synthesized applied for both rigid flexible photodetectors. Rigid photodetectors based on have the features of linear photocurrent characteristics, low dynamic range good sensitivity to light intensity. Especially, Sb2S3 nanoflowers photodetector has high photoresponse characteristics its response time decay found be relatively fast as 6 ms 10 respectively. The flexible, light-weight adequate bendability with a about 0.09 s...
Abstract Construction cost estimation, which is normally labor‐intensive and error‐prone, one of the most important works concerned by multiparticipants during a project's life cycle. However, proficiency estimators on specifications for construction estimation greatly affects efficiency accuracy estimation. By formalizing such can be better implemented in computer programs so that working improved. This study aims to establish an effective approach formalize using ontology. First, two...
Abstract Chirality is a magical property that exists in nature universally, ranging from the spin of microscopic electrons to galaxies. Furthermore, circularly polarized organic electroluminescent materials have promising prospects improving brightness displays, but there are still some problems. At present, most chiral thermally activated delayed fluorescence small molecules show relatively low luminescence (CPL) dissymmetry factors between 10 −4 and −3 because electric dipole‐allowed...
Abstract Perovskite films have long been plagued by defects, mainly located at grain boundaries, leading to device degradation, especially the effects of residual PbI 2 . As effective boundary passivators, organic ammonium salts are thus extensively investigated. Here, study introduces a nitrogen heterocyclic molecule, 1,3‐diphenyl‐benzimidazole iodide (DBI), for post‐treatment perovskite film construct robust one‐dimensional (1D)/three‐dimensional (3D) structure. The 1D structure DBPbI 3...
The mechanism and elemental composition that form the basis for improved optical electronic properties in mixed-ion lead halide perovskite solar cells are still not well understood compared to standard methylammonium triiodide devices. Here, we use synchrotron-based X-ray fluorescence map of thin films. To get insight into distribution during film growth, fabricate films with three different thicknesses. create a link between properties, perform Kelvin probe force microscopy time-resolved...
These days, organic-inorganic hybrid perovskites (OIHP) and non-fullerene acceptor (NFA) molecules are all at the frontiers of research development in domain photovoltaics. A careful design use inorganic transparent metal oxides with wide band gaps as electron hole transport layers critically important for highly efficient stable solar cells. As one most favorable materials, tin oxide (SnO2), which has been frequently utilized OIHP cells, is rarely seen application NFA organic bulk...