A5021899622- Perovskite Materials and Applications
- Organic Light-Emitting Diodes Research
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Gas Sensing Nanomaterials and Sensors
- Advanced Memory and Neural Computing
- Advanced Sensor and Energy Harvesting Materials
- Advanced Chemical Sensor Technologies
- Ga2O3 and related materials
- Spectroscopy and Laser Applications
- Chalcogenide Semiconductor Thin Films
- Olfactory and Sensory Function Studies
- Nanoplatforms for cancer theranostics
- Neural dynamics and brain function
- CCD and CMOS Imaging Sensors
- Optical Wireless Communication Technologies
- Nanowire Synthesis and Applications
- Polydiacetylene-based materials and applications
- Advanced Thermoelectric Materials and Devices
- Transition Metal Oxide Nanomaterials
- Photoacoustic and Ultrasonic Imaging
- Neuroscience and Neural Engineering
- Technostress in Professional Settings
University of Hong Kong
2022-2024
Hong Kong University of Science and Technology
2022-2024
State Key Laboratory on Integrated Optoelectronics
2024
HKUST Shenzhen Research Institute
2022
Shenzhen University
2019
Metal halide perovskites have shown great promise as a potential candidate for next-generation solid state lighting and display technologies. However, generic organic ligand-free antisolvent-free solution method to fabricate highly efficient full-color perovskite light-emitting diodes has not been realized. Herein, by utilizing porous alumina membranes with ultra-small pore size templates, we successfully fabricated crystalline all-inorganic quantum wire arrays ultrahigh density excellent...
Garnering inspiration from biological compound eyes, artificial vision systems boasting a vivid range of diverse visual functional traits have come to the fore recently. However, most these rely on transformable electronics, which suffer complexity and constrained geometry global deformation, as well potential mismatches between optical detector units. Here, we present unique pinhole eye that combines three-dimensionally printed honeycomb structure with hemispherical, all-solid-state,...
Color tunability of perovskite light-emitting diodes (PeLEDs) by mixed halide compositional engineering is one the primary intriguing characteristics PeLEDs. However, PeLEDs are often susceptible to color red-shifting caused ion segregation. In this work, strongly quantum-confined nanowires (QPNWs) made CsPbBr3 grown in nanoporous anodic alumina templates using a closed space sublimation process. By tuning pore size with atomic layer deposition, QPNWs diameter 6.6 2.8 nm have been...
Fiber light-emitting diodes (Fi-LEDs), which can be used for wearable lighting and display devices, are one of the key components fiber/textile electronics. However, there exist a number impediments to overcome on device fabrication with fiber-like substrates, as well encapsulations. Here, we uniformly grew all-inorganic perovskite quantum wire arrays by filling high-density alumina nanopores surface Al fibers dip-coating process. With two-step evaporation method coat surrounding...
Charge collection narrowing (CCN) has been reported to be an efficient strategy achieve optical filter-free narrowband photodetection (NPD) with metal halide perovskite (MHP) single crystals. However, the necessity of utilizing thick crystals in CCN limits their applications large scale, flexible, self-driven, and high-performance optoelectronics. Here, for first time, we fabricate vertically integrated MHP quantum wire/nanowire (QW/NW) array based photodetectors nanoengineered porous...
Infrared vision is highly desirable for applications in multifarious fields. Of the few species with this visual capability, snakes have exceptional infrared perception assistance of pit organs. Inspired by organ design we present here a hemispherical biomimetic imaging device. The devices use high-density ionic thermoelectric polymer nanowire arrays that serve as sensing nerve cells. individual nanowires exhibit notable voltage response to temperature variation test objects. An sensor array...
Abstract A single device with a variety of capabilities is highly attractive for the increasing demands complex and multifunctional optoelectronics. hybrid heterojunction formed between CsPbBr 3 halide perovskite chalcogenide quantum dots demonstrated. The served as an asymmetric active layer allows not only charge separation/exciton dissociation in benign process, but also carrier injection/recombination suppression bulk interfacial nonradiative recombination. An individual incorporating...
Abstract Electroluminescent devices based on metal halide perovskites have attracted extensive attention owing to their high external quantum efficiency, excellent color purity, and inexpensive solution process. So far, efforts been made improve the efficiency of monochromatic perovskite light‐emitting diodes (LEDs). However, multicolor perovskite‐based LEDs are seldom studied. Here, an individual device capable emission in response passage electric bias is demonstrated. With rational design...
Perovskite nanopillars (PNPs) are propitious candidates for solar irradiation harvesting and potential alternatives to thin films in flexible photovoltaics. To realize efficient daily energy output, photovoltaics must absorb sunlight over a broad range of incident angles wavelengths congruent with the spectrum. Herein, we report highly periodic three-dimensional (3D) PNP-based possessing core–shell structure. The vertically aligned PNP arrays demonstrate up 95.70% 75.10% absorption at peak...
A tetrachromatic light sensor can detect in four independent color channels and extend its detection range beyond the visible spectrum. However, current sensors face challenges such as inability to work reliably extreme temperatures. In this work, we present a fully integrated tandem perovskite imaging system. Four layers of all-inorganic perovskites device serve ultraviolet, blue, green, red detectors discriminate spectral non-spectral colors. The image comprises 32 × color-selective pixel...
The Gestalt principles of perceptual learning elucidate how the human brain categorizes and comprehends a set visual elements grouped together. One is law closure which propounds that perception has proclivity to visualize fragmented object as preknown whole by bridging missing gaps. Herein, letter recognition scheme emulating principle demonstrated, utilizing artificial synapses made 3D integrated MA 3 Bi 2 I 9 (MBI) perovskite nanowire (NW) array. exhibit short‐term plasticity (STP)...
Metal halide perovskite materials have been widely developed for next‐generation light‐emitting diodes (LEDs) because of their outstanding optoelectronic characteristics. However, it remains impediments to fabricate large‐scale or non‐planar devices by traditional solution methods. Herein, we introduce a close‐spaced vapor reaction method uniformly growing quantum wire (QW) arrays in porous alumina membrane templates on unconventional substrates air. The as‐grown MAPbBr3 QWs showcase...
In article number 1807894, Guijun Li and co-workers show that an asymmetric design can be used to build a device functions as voltage controllable multicolor light emitter, ultrafast photosensitive detector, high photovoltage energy harvesting device. The efficient optoelectronic is enabled by the asymmetry allows independent control of charge injection carrier separation.
In this work, we demonstrate a light‐emitting diode with voltage‐controlled multicolor electroluminescence. The emission color can be finely tuned by the applied voltage, corresponding to change from red orange, yellow and finally green. Voltage‐controlled red‐green electroluminescence take place in either CsPbBr 3 or CdSe QDs, depending on ratio of recombination zone between these two materials.
Perovskite Nanowires A vertically integrated perovskite nanowire array is used by Zhiyong Fan and co-workers (article number 2200065) to develop artificial neuron-synapse interconnects. With an aim make AI vision more human-like impart common-sense comprehension hardware, a physical neural network (ANN) constructed, such that it can discriminate between fragmented letters exhibit withering synaptic connectivity with increasing missing fragments, akin the cognitive learning model of Gestalt...
Perovskite light-emitting diodes (PeLEDs) have experienced rapid development in the past 8 years. The external quantum efficiencies (EQEs) of red, green, and near-infrared (NIR) PeLEDs all surpassed 20% milestone. Meanwhile, blue also achieved EQEs higher than 10% are catching up quickly with other colors. However, there still two key problems remaining within for their further development, namely light extraction problem short lifetime problem. Therefore, this report, we will discuss our...