A5088956869- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Solid-state spectroscopy and crystallography
- Conducting polymers and applications
- Advanced Photocatalysis Techniques
- Luminescence Properties of Advanced Materials
- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- Ga2O3 and related materials
- TiO2 Photocatalysis and Solar Cells
- Machine Learning in Materials Science
- Antibiotics Pharmacokinetics and Efficacy
- Advanced biosensing and bioanalysis techniques
- Biosensors and Analytical Detection
- GaN-based semiconductor devices and materials
- Neural Networks and Reservoir Computing
- Advanced Memory and Neural Computing
Ningbo Product Quality Supervision and Inspection Institute
2024
Georgia Institute of Technology
2021-2023
Tianjin University
2019-2021
Collaborative Innovation Center of Chemical Science and Engineering Tianjin
2021
Tianjin University of Technology
2014
Binzhou Medical University
2007
The certified power conversion efficiency of state-of-the-art organic–inorganic hybrid perovskite solar cells has surpassed 25%, showing promising potential for commercialization. Compared with volatile methylammonium-based perovskites, formamidinium- and cesium-based halide perovskites have attracted attention due to their resistance thermal degradation. However, the photoactive phases these materials suffer from limited phase stability at room temperature are prone spontaneous...
The impact of the bulky-cation-modified interfaces on halide perovskite solar cell stability is underexplored. In this work, thermal instability bulky-cation interface layers used in state-of-the-art cells demonstrated. X-ray photoelectron spectroscopy and synchrotron-based grazing-incidence scattering measurements reveal significant changes chemical composition structure at surface these films that occur under stress. charge-carrier dynamics device operation, as shown transient...
Mixed-cation metal halide perovskites have shown remarkable progress in photovoltaic applications with high power conversion efficiencies. However, to achieve large-scale deployment of this technology, efficiencies must be complemented by long-term durability. The latter is limited external factors, such as exposure humidity and air, which lead the rapid degradation perovskite materials devices. In work, we study mechanisms causing Cs formamidinium (FA)-based phase transformations...
The composition-dependent degradation of hybrid organic-inorganic perovskites (HOIPs) due to environmental stressors still precludes their commercialization. It is very difficult quantify behavior upon exposure each stressor by exclusively using trial-and-error methods the high-dimensional parameter space involved. We implement machine learning (ML) models high-throughput, in situ photoluminescence (PL) predict response Cs y FA1-y Pb(Br x I1-x )3 while exposed relative humidity cycles....
The fundamental structure–property relationships in the Cs y FA 1− Pb(Br x I ) 3 compositional space are reported.
Preferred crystallographic orientation in polycrystalline films is desirable for efficient charge carrier transport metal halide perovskites and semiconductors. However, the mechanisms that determine preferred of are still not well understood. In this work, we investigate lead bromide perovskites. We show solvent precursor solution organic A-site cation strongly affect deposited perovskite thin films. Specifically, solvent, dimethylsulfoxide, influences early stages crystallization induces...
A novel floating visible-light photocatalyst (HGMs-TiO2/Ag3PO4) composite was prepared using amino modified low-density hollow glass microspheres (HGMs) as carriers to disperse and support TiO2 Ag3PO4 photocatalysts. The surface morphology, crystal structure optical properties of the HGMs-TiO2/Ag3PO4 composites were characterized content on determined by atomic absorption spectrometry (AAS). Methylene blue (MB) chose organic pollutant investigate catalytic composites. For HGM photocatalysts,...
Herein we describe a thermal treatment route to synthesize gallium nitride (GaN) nanorods. In this method, GaN nanorods were synthesized by of films at temperature 800 °C. The morphology and structure characterized scanning electron microscopy (SEM) transmission (TEM). results show that have hexagonal wurtzite with diameters ranging from 30 50 nm. Additionally, nanoplates are also founded in the products. growth process nanostructures was investigated decomposition mechanism proposed. Our...
Fe-doped In 2 O 3 nanowires were synthesized on an Si substrate with the deposited Au layer by a CVD method and characterized XRD, SEM, TEM , PL measurement was performed using HeCd laser excitation at 325 nm. preferentially grow along [10 direction The spectra of show ultraviolet (UV) emission blue emission. property are discussed.
To mitigate perovskites’ degradation, there have been a pressing need to identify the effects of environmental stressors on material physical behavior and device performance. We implement high-throughput photoluminescence (PL) interrogate response Cs-FA perovskites with range chemical composition while exposed temperature relative humidity cycles. These measurements are used as input when comparing how machine learning methods can be realized forecast response. quantitatively compare linear...
The hollow glass microspheres (HGMs) with low density were used as the support to obtain floating visible-light photocatalysts (HGMs–Ag3PO4) composites, in which silver orthophosphate (Ag3PO4) was dispersed on surface of HGMs via silane coupling agents. morphology, crystal structure and optical property HGMs-Ag3PO4 composites characterized contents Ag3PO4 quantified by atomic absorption spectrometry (AAS). Methylene blue (MB) selected typical organic pollutants evaluate photocatalytic...
One of the organic component in perovskite photo-absorber, methylammonium cation, has been suggested to be a roadblock long-term operation organic-inorganic hybrid perovskite-based solar cells. Methylammonium-free perovskites thus represent possible direction for more stable photo-absorbers that are also compatible with multijunction However, most work on methylammonium-free involves cesium and formamidinium as A-site cations, which thermodynamically less than methylammonium-based materials....
The impact on device stability of the bulky cation-modified interfaces in halide perovskite solar cells is not well-understood. We demonstrate thermal instability cation interface layers used some highest performing to date. X-ray photoelectron spectroscopy and synchrotron-based grazing incidence scattering measurements reveal significant changes under stress chemical composition structure at surface these films. charge carrier dynamics operation, as shown transient photoluminescence,...
The impact on device stability of the bulky cation-modified interfaces in halide perovskite solar cells is not well-understood. We demonstrate thermal instability cation interface layers used some highest performing to date. X-ray photoelectron spectroscopy and synchrotron-based grazing incidence scattering measurements reveal significant changes under stress chemical composition structure at surface these films. charge carrier dynamics operation, as shown transient photoluminescence,...
One of the organic component in perovskite photo-absorber, methylammonium cation, has been suggested to be a roadblock long-term operation organic-inorganic hybrid perovskite-based solar cells. Methylammonium-free perovskites thus represent possible direction for more stable photo-absorbers that are also compatible with multijunction However, most work on methylammonium-free involves cesium and formamidinium as A-site cations, which thermodynamically less than methylammonium-based materials....
The impact on device stability of the bulky cation-modified interfaces in halide perovskite solar cells is not well-understood. We demonstrate thermal instability cation interface layers used some highest performing to date. X-ray photoelectron spectroscopy and synchrotron-based grazing incidence scattering measurements reveal significant changes under stress chemical composition structure at surface these films. charge carrier dynamics operation, as shown transient photoluminescence,...