ORCID Profile
0000-0002-0998-2448
Current Organisation
Taiyuan University of Science and Technology
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In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Electrical and Electronic Engineering | Photodetectors, Optical Sensors and Solar Cells | Composite and Hybrid Materials | Optical Properties of Materials | Nonlinear Optics and Spectroscopy
Expanding Knowledge in the Physical Sciences | Solar-Photovoltaic Energy | Hydrogen Production from Renewable Energy |
Publisher: American Chemical Society (ACS)
Date: 31-07-2023
DOI: 10.1021/JACS.3C04890
Publisher: SAGE Publications
Date: 15-12-2011
Abstract: By use of hand gesture recognition technology, traditional remote manufacturing networks can be operated by disabled people who lose the grasp ability. The surface electromyography (sEMG) network inference is critically important for revealing fundamental hand gesture processes, investigating sEMG functions, and understanding their relations. However, current hand gesture recognition methods using sEMG do not sufficiently consider the temporal behavior of this type of data and lack the capability to capture the complex nonlinear system dynamics. It is therefore imperative to have good methods to explore a more suitable choice, which can avoid the problems mentioned above. This paper presents a rapid prototyping manufacturing network with sEMG using recurrent hidden Markov models (RHMMs) and a particle swarm optimization (PSO) approach. It also provides high-level modeling, programming methods, and running results for this remote manufacturing network in terms of software and hardware. PSO is used to train the RHMM and determine the model parameters. Remote manufacturing is accomplished between the network monitor center and a number of sensor nodes by use of a sEMG sensor circuit and Winsock monitor sensors. Furthermore, it has such advantages as network wireless, low cost, and strong interaction and expansibility, and is easy to maintain and promote.
Publisher: American Chemical Society (ACS)
Date: 19-07-2023
Publisher: American Chemical Society (ACS)
Date: 12-12-2019
DOI: 10.1021/ACS.JPCLETT.9B03210
Abstract: The dynamics of photogenerated carriers and mobile ions in operational cesium lead halide (CsPbI
Publisher: IOP Publishing
Date: 31-08-2007
Publisher: AIP Publishing
Date: 07-01-2019
DOI: 10.1063/1.5081805
Abstract: Lead halide perovskite nanocrystals (NCs) have rapidly emerged as promising materials for low-cost and high-efficiency photovoltaic, optoelectronic, and photonic devices. The Stokes shift is a crucial parameter affecting their performance. In this work, we find that the external Stokes shift is strongly dependent on photon recycling. Due to the nonlinear nature of the quantum confinement effect (QCE), the bandgap distribution becomes extremely broad when the sizes are ultra-small, resulting in many repetitions of photon recycling and substantial emission redshift. Thereby, the smaller NCs exhibit larger external Stokes shifts. In detail, for the small NCs with the most probable size of 6.4 nm, the intrinsic Stokes shift is about 71 meV, but the observed external Stokes shift becomes 143.4 meV in the concentrated solution, whereas the intrinsic and apparent Stokes shifts are 69 and 97.6 meV for large NCs of 9.7 nm. Therefore, photon recycling significantly contributes to the external Stokes shift of perovskite NCs, in particular for the ultra-small sizes with strong QCE. This finding will add to the growing fundamental physical understanding of perovskites, which is of great interest due to their applications in photovoltaics and other fields.
Publisher: Wiley
Date: 25-12-2022
Abstract: Metal halide perovskites (MHPs) have demonstrated great advances for photovoltaic and optoelectronic applications. However, owing to the presence of the synergy from lattice strain, defects of MHPs, and environment, MHPs suffer from phase transitions and degradation, resulting in the restriction of their practical applications and further commercialization. Multiple metal elements can coexist in MHPs to form alloys due to the high tolerance of lattice and the composition replaceability, which provides a novel strategy for improvement of performance and stability. In this review, the recent advances of alloy engineering of MHPs, focusing on the cation and the metal ion (A‐ and B‐site) alloy strategies, are reviewed. The alloy effects on the crystalline structure, optoelectronic properties, ferroelectricity, carrier dynamics, and stability of perovskites are interpreted. Finally, the prospect of this study is the challenges in the MHPs alloy engineering.
Publisher: American Chemical Society (ACS)
Date: 28-07-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1TC01656C
Abstract: Different dynamics of excitons and free carriers in 2D Ruddlesden–Popper halide perovskites with layer numbers of n = 1 and n ≥ 2.
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9NR04787E
Abstract: The green fluorescence of CsPbBr 3 –Cs 4 PbBr 6 perovskite composites is ascribed to the emissions of band-edge and the defect trapped exciton of CsPbBr 3 .
Publisher: IOP Publishing
Date: 06-07-2007
Publisher: Springer Science and Business Media LLC
Date: 03-2008
Publisher: Springer Science and Business Media LLC
Date: 07-04-2007
Publisher: Wiley
Date: 21-07-2016
Abstract: Efficient interfacial charge transfer is essential in graphene-based semiconductors to realize their superior photoactivity. However, little is known about the factors (for ex le, semiconductor morphology) governing the charge interaction. Here, it is demonstrated that the electron transfer efficacy in reduced graphene oxide-bismuth oxide (RGO/BiVO
Publisher: Springer Science and Business Media LLC
Date: 12-02-2013
Publisher: American Chemical Society (ACS)
Date: 30-06-2020
Publisher: AIP Publishing
Date: 30-10-2006
DOI: 10.1063/1.2372747
Abstract: We have studied ZnO∕ZnMgO multiple quantum wells by spectrally resolved transient four-wave mixing with both one- and two-color excitations. The presence of an extended signal at negative interpulse delays in the two-color experiment is attributed to the two-photon coherence resulting from the generation of biexcitons. This technique provides a means to observe a transient four-wave mixing from biexcitons in the absence of any other signal, and thereby provides the first clear evidence that biexcitons are present in narrow ZnO∕ZnMgO quantum wells at room temperature. Dephasing times of the order of 100fs for the biexcitons are measured.
Publisher: American Chemical Society (ACS)
Date: 13-05-2020
Publisher: Walter de Gruyter GmbH
Date: 06-2020
Abstract: Lead (Pb) halide perovskites have witnessed highly promising achievements for high-efficiency solar cells, light-emitting diodes (LEDs), and photo/radiation detectors due to their exceptional optoelectronic properties. However, compound stability and Pb toxicity are still two main obstacles towards the commercialization of halide perovskite-based devices. Therefore, it is of substantial interest to search for non-toxic candidates with comparable photophysical characteristics. Metal-halide double perovskites (MHDPs), A 2 BBʹX 6 , are recently booming as promising alternatives for Pb-based halide-perovskites for their non-toxicity and significantly enhanced chemical and thermodynamic stability. Moreover, this family exhibits rich combinatorial chemistry with tuneable optoelectronic properties and thus a great potential for a broad range of optoelectronic/electronic applications. Herein, we present a comprehensive review of the MHDPs synthesized so far, and classified by their optical and electronic properties. We systematically generalize their electronic structure by both theoretical and experimental efforts to prospect the relevant optoelectronic properties required by different applications. The progress of the materials in various applications is explicated in view of the material structure-function relationship. Finally, a perspective outlook to improve the physical and optoelectronic properties of the materials is proposed aiming at fostering their future development and applications.
Publisher: American Chemical Society (ACS)
Date: 02-03-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1TA00036E
Abstract: A strategy to utilize carbon dots for simultaneously improving photovoltaic performance and longevity of metal halide perovskite solar cells.
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7NR07567G
Abstract: Photoexcited carriers are mainly excitons in InGaN/GaN multiple quantum well planar layers while free electron holes are greatly increased in nanorods.
Publisher: SPIE
Date: 22-12-2015
DOI: 10.1117/12.2202420
Publisher: Wiley
Date: 14-05-2023
Abstract: The emerging 2D nanomaterials with unique optical properties are promising for next‐generation miniatured on‐chip devices. One of the prerequisites is to precisely measure their optical parameters during their implementation. However, the inherent features of 2D layers, including limited lateral dimensions and ultra‐small thicknesses, are not favorable to the conventional characterization techniques applied in the bulk system, especially for optical complex refractive indices measurement. Here, this work proposes a silicon photonics‐enabled platform to evaluate the complex refractive indices of ultrathin 2D materials in a facile and reliable manner. Ultrathin molybdenum oxides (MoO x ) with multiple stoichiometric states are selected as the target 2D material to provide sufficient complexity of the system for investigation. Upon the integration of ultrathin MoO x , the silicon photonic chip, in the form of a Mach‐Zehnder interferometer, exhibits wavelength shifts which are used for calculating the optical complex refractive indices. Compared with the theoretical calculation, the deviation is as low as 1% and generally less than 5%. This work demonstrates a highly accurate and reliable approach for measuring the complex refractive index of 2D films, possibly assisting future advances in 2D materials‐enabled optical and photonic applications.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0TC05676F
Abstract: A 2D Ga 2 S 3 enabled all-optical switch is realized upon a silicon-based on-chip platform. With the unique optical properties of the 2D nanoflakes, the device exhibits excellent switching behaviors driven by visible light at a low power density.
Publisher: Wiley
Date: 30-04-2019
Publisher: IOP Publishing
Date: 14-01-2008
DOI: 10.1088/0957-4484/19/05/055205
Abstract: Strong suppression of the effects caused by the internal electric field in ZnO/ZnMgO quantum wells following ion-implantation and rapid thermal annealing, is revealed by photoluminescence, time-resolved photoluminescence, and band structure calculations. The implantation and annealing induces Zn/Mg intermixing, resulting in graded quantum well interfaces. This reduces the quantum-confined Stark shift and increases electron-hole wavefunction overlap, which significantly reduces the exciton lifetime and increases the oscillator strength.
Publisher: American Chemical Society (ACS)
Date: 06-08-2018
DOI: 10.1021/ACS.JPCLETT.8B02127
Abstract: Doping in perovskite is challenging and competitive due to the inherently fast growth mechanism of perovskite structure. Here, we demonstrate successful synthesis of high-yield Fe-doped cesium lead halide perovskite ultralong microwires (MWs) that have diameters up to ∼5 μm and lengths up to millimeters via an antisolvent vapor-assisted template-free method. Microstructure characterization confirms the uniformly doped Fe in the high-quality crystal perovskite MWs. Significantly, doping the Fe(III) concentration can affect both the MW morphology and photoluminescence (PL). The band edge emission of the MW at variable excitation has been accounted for by the superposition and combination of optical transitions of nearby singlet, triplet, and magnetic polaronic excitons. High-quality two-photon PL emission and the enhanced nonlinear absorption coefficient of Fe-doped MWs have been experimentally demonstrated. This superhigh nonlinear absorption coefficient and high-quality optical properties endow it with promising applications in spin-related optical switching and optical limiting devices.
Publisher: American Chemical Society (ACS)
Date: 15-10-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2TA08827D
Abstract: Metal halide perovskites (MHPs), as a new generation optoelectronic materials, have attracted a surge of attention due to their remarkable intrinsic properties.
Publisher: American Chemical Society (ACS)
Date: 20-01-2021
Publisher: AIP Publishing
Date: 28-05-2007
DOI: 10.1063/1.2745264
Abstract: The authors investigate the effect of oxygen implantation and rapid thermal annealing in ZnO∕ZnMgO multiple quantum wells using photoluminescence. A blueshift in the photoluminescence is observed in the implanted s les. For a low implantation dose, a significant increase of activation energy and a slight increase of the photoluminescence efficiency are observed. This is attributed to the suppression of the point defect complexes and transformation between defect structures by implantation and subsequent rapid thermal annealing. A high dose of implantation leads to lattice damage and agglomeration of defects leading to large defect clusters, which result to an increase in nonradiative recombination.
Publisher: American Chemical Society (ACS)
Date: 07-2019
Abstract: Lead halide perovskites are widely applied in not only photovoltaics but also on-chip light sources and photon detection. To promote the incorporation of perovskite into integrated devices, microscale color patterning flexibility is a very important step. Here, we demonstrate spatially resolved modulation of the fluorescence of nanoplatelets (NPs) by femtosecond direct laser writing (fs-DLW). As the perovskite NP for the fs-DLW pattern is specially designed with a gradual bromide-iodide composition along the depth, the replacement of iodide ions by bromide ions can be activated under a controlled laser pulse and fluorescence is thus modulated from red to green. The effect of processing depth and NP thickness on fluorescence modulation is systemically investigated. The as-grown thick NP (thickness ≈ 500 nm) mainly exhibits a 690 nm emission from the bottom iodine-rich phase. After halide substitution induced by fs-DLW, a new fluorescence peak appears in the wavelength range of 540-600 nm the peak position and intensity are controlled by the DLW conditions. The fluorescent color is spatially modulated from red to green, enabling microscale-resolved multicolor emission. Compared with other currently available techniques, microscale color patterning via fs-DLW is a straightforward mask-free one-step operation, yielding high spatial resolution and enabling three-dimensional patterning by the multiple-photon method. We demonstrate that arbitrary patterns can be drawn on a wide range of perovskite NPs, implying the potential applications in microencryption, sensors, multicolor displays, lasers, and light-emitting devices.
Publisher: American Chemical Society (ACS)
Date: 03-04-2023
Publisher: Wiley
Date: 23-05-2019
Publisher: Wiley
Date: 04-2019
Publisher: American Chemical Society (ACS)
Date: 14-01-2020
Abstract: Metal and metal-oxide particles are commonly photodeposited on photocatalysts by reduction and oxidation reactions, respectively, consuming charges that are generated under illumination. This study reveals that amorphous MoO
Publisher: Elsevier BV
Date: 11-2015
Publisher: Elsevier BV
Date: 02-2009
Publisher: American Chemical Society (ACS)
Date: 24-06-2022
DOI: 10.1021/ACS.CHEMREV.2C00048
Abstract: The outstanding chemical and physical properties of 2D materials, together with their atomically thin nature, make them ideal candidates for metaphotonic device integration and construction, which requires deep subwavelength light-matter interaction to achieve optical functionalities beyond conventional optical phenomena observed in naturally available materials. In addition to their intrinsic properties, the possibility to further manipulate the properties of 2D materials via chemical or physical engineering dramatically enhances their capability, evoking new science on light-matter interaction, leading to leaped performance of existing functional devices and giving birth to new metaphotonic devices that were unattainable previously. Comprehensive understanding of the intrinsic properties of 2D materials, approaches and capabilities for chemical and physical engineering methods, the resulting property modifications and novel functionalities, and applications of metaphotonic devices are provided in this review. Through reviewing the detailed progress in each aspect and the state-of-the-art achievement, insightful analyses of the outstanding challenges and future directions are elucidated in this cross-disciplinary comprehensive review with the aim to provide an overall development picture in the field of 2D material metaphotonics and promote rapid progress in this fast emerging and prosperous field.
Publisher: Elsevier BV
Date: 06-2022
Publisher: American Chemical Society (ACS)
Date: 04-2021
Publisher: Wiley
Date: 20-08-2019
Publisher: American Chemical Society (ACS)
Date: 28-08-2018
Abstract: The current-voltage hysteresis, as well as the performance instability of perovskite solar cells (PSCs) under a working condition, is serving as the major obstacle toward their commercialization while the exact fundamental mechanisms to these issues are still in debate. In this study, we investigated the slow variation of photogenerated carrier dynamics in a (FAPbI
Publisher: Wiley
Date: 11-10-2020
Publisher: American Chemical Society (ACS)
Date: 27-08-2018
Publisher: American Chemical Society (ACS)
Date: 18-05-2020
Publisher: Wiley
Date: 28-04-2022
Abstract: Charge carrier transport in materials is of essential importance for photovoltaic and photonic applications. Here, the authors demonstrate a controllable acceleration or deceleration of charge carrier transport in specially structured metal‐alloy perovskite (MACs)PbI 3 (MA= CH 3 NH 3 ) single‐crystals with a gradient composition of CsPbI 3 /(MA 1− x Cs x )PbI 3 /MAPbI 3 . Depending on the Cs‐cation distribution in the structure and therefore the energy band alignment, two different effects are demonstrated: i) significant acceleration of electron transport across the depth driven by the gradient band alignment and suppression of electron–hole recombination, benefiting for photovoltaic and detector applications and ii) decelerated electron transport and thus improved radiative carrier recombination and emission efficiency, highly beneficial for light and display applications. At the same time, the top Cs‐layer results in hole localization in the top layer and surface passivation. This controllable acceleration and deceleration of electron transport is critical for various applications in which efficient electron–hole separation and suppressed nonradiative electron–hole recombination is demanded.
Publisher: IOP Publishing
Date: 05-09-2006
Publisher: American Chemical Society (ACS)
Date: 17-10-2019
Abstract: Excitation wavelength-dependent photoluminescence (PL) in two-dimensional (2D) transition-metal chalcogenides enables a strong excitonic interaction for high-performance chemical and biological sensing applications. In this work, we explore the possible candidates in the domain of post-transition-metal chalcogenides. Few-layered 2D p-type tin monosulfide (SnS) nanoflakes with submicrometer lateral dimensions are synthesized from the liquid phase exfoliation of bulk crystals. Excitation wavelength-dependent PL is found, and the excitonic radiative lifetime is more than one order enhanced compared to that of the bulk counterpart because of the quantum confinement effect. Paramagnetic NO
Start Date: 2016
End Date: 05-2020
Amount: $415,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 04-2016
End Date: 12-2019
Amount: $370,000.00
Funder: Australian Research Council
View Funded Activity