A5001477958- Perovskite Materials and Applications
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Organic Electronics and Photovoltaics
- Thin-Film Transistor Technologies
- Advanced Sensor and Energy Harvesting Materials
- Chalcogenide Semiconductor Thin Films
- Advanced Memory and Neural Computing
- Nanowire Synthesis and Applications
- Semiconductor materials and devices
- Analytical Chemistry and Sensors
- Photonic and Optical Devices
- Carbon Nanotubes in Composites
- Photonic Crystals and Applications
- Gas Sensing Nanomaterials and Sensors
- Organic Light-Emitting Diodes Research
- Solid-state spectroscopy and crystallography
- Energy Harvesting in Wireless Networks
- GaN-based semiconductor devices and materials
- ZnO doping and properties
- Green IT and Sustainability
- Innovative Energy Harvesting Technologies
- Force Microscopy Techniques and Applications
- Optical properties and cooling technologies in crystalline materials
- Luminescence and Fluorescent Materials
Simon Fraser University
2021-2025
Soochow University
2017-2021
University of Cambridge
2009-2017
All‐inorganic perovskite light‐emitting diodes (LEDs) reveal efficient luminescence with high color purity, but their modest brightness and poor stability are still critical drawbacks. Here, the luminescent efficiency of LEDs (PeLEDs) boosted by antisolvent vapor treatment CsPbBr 3 embedded in a dielectric polymer matrix polyethylene oxide (PEO). A unique method is developed to obtain quality emitting layers low defects controlling grain sizes. PEO post‐treated chloroform (CF), leading...
Abstract The Internet of Things (IoT) provides everyday objects and environments with “intelligence” data connectivity to improve quality life the efficiency a wide range human activities. However, ongoing exponential growth IoT device ecosystem—up tens billions units date—poses challenge regarding how power such devices. This Progress Report discusses energy harvesting can address this challenge. It then indoor photovoltaics (IPV) constitutes an attractive solution, given its deployability,...
Abstract With the exponential rise in market value and number of devices part Internet Things (IoT), demand for indoor photovoltaics (IPV) to power autonomous is predicted rapidly increase. Lead‐free perovskite‐inspired materials (PIMs) have recently attracted significant attention research, due similarity their electronic structure high‐performance lead‐halide perovskites, but without same toxicity limitations. However, capability PIMs light harvesting has not yet been considered. Herein,...
Abstract Ambient energy harvesting has great potential to contribute sustainable development and address growing environmental challenges. Converting waste from energy-intensive processes systems (e.g. combustion engines furnaces) is crucial reducing their impact achieving net-zero emissions. Compact harvesters will also be key powering the exponentially smart devices ecosystem that part of Internet Things, thus enabling futuristic applications can improve our quality life homes, cities,...
Abstract The dissemination of sensors is key to realizing a sustainable, ‘intelligent’ world, where everyday objects and environments are equipped with sensing capabilities advance the sustainability quality our lives—e.g. via smart homes, cities, healthcare, logistics, Industry 4.0, precision agriculture. realization full potential these applications critically depends on availability easy-to-make, low-cost sensor technologies. Sensors based printable electronic materials offer ideal...
A general semiconductor-independent two-dimensional character of the carrier distribution in top-gate polymer field-effect transistors is revealed by analysing temperature-dependent transfer characteristics and sub-bandgap absorption tails semiconductors. correlation between extracted width density states Urbach energy presented, corroborating 2D accumulation layer demonstrating an intricate connection optical measurements concerning disorder charge transport transistors.
In recent years, lead-free metal-halide perovskite photovoltaics has attracted ever-growing attention, in view of its potential to replicate the outstanding properties lead-halide photovoltaics, but without toxicity burden latter. Despite a research effort much smaller scale than that pursued with lead-based perovskites, considerable progress been achieved highest power conversion efficiencies now being region 13%. this Perspective, we first discuss state art and additionally highlight...
Abstract The ongoing Internet of Things revolution has led to strong demand for low‐cost, ubiquitous light sensing based on easy‐to‐fabricate, self‐powered photodetectors. While solution‐processable lead‐halide perovskites have raised significant hopes in this regard, toxicity concerns prompted the search safer, lead‐free perovskite‐inspired materials (PIMs) with similar optoelectronic potential. Antimony‐ and bismuth‐based PIMs are found particularly promising; however, their photodetector...
Abstract In the wake of lead‐halide perovskite research, bismuth‐ and antimony‐based perovskite‐inspired semiconducting materials are attracting increasing attention as safer potentially more robust alternatives to lead‐based archetypes. Of particular interest group IB–group VA halide compositions with a generic formula A x B y X +3 (A + = Cu /Ag ; 3+ Bi /Sb – I /Br ), i.e., silver/copper pnictohalides derivatives thereof. This family forms 3D structures much higher solar cell efficiencies...
Carbon electrodes have gained significant attention as a cost‐effective, sustainable, stable, and scalable replacement for metal in perovskite solar cells (PSCs). However, traditional carbon‐electrode‐based PSCs (C‐PSCs) lack hole‐selective layer (HSL) due to their incompatibility with the most effective organic HSLs employed PSC literature. In turn, absence of an HSL has been identified one main factors hindering performance C‐PSCs. Consequently, numerous studies recognized pivotal...
Abstract Spectrally‐selective photodetection via organic semiconductors manifesting narrowband absorption (NBA photodetection) is highly attractive for emerging applications that require ultrathin, lightweight, and low‐cost solutions. While successful over mainstream color bands, NBA photodetectors have struggled so far to meet the functional and/or performance demands at longer wavelengths, importantly in far‐red (700–750 nm), a range relevant diverse analytical biology, medical...
Abstract In recent years, solution-processible semiconductors with perovskite or perovskite-inspired structures have been extensively investigated for optoelectronic applications. particular, silver–bismuth–halides identified as especially promising because of their bulk properties and lack heavily toxic elements. This study investigates the potential Ag 2 BiI 5 near-infrared (NIR)-blind visible light photodetection, which is critical to emerging applications (e.g., wearable optoelectronics...
Abstract In the search for nontoxic alternatives to lead‐halide perovskites, bismuth oxyiodide (BiOI) has emerged as a promising contender. BiOI is air‐stable over three months, demonstrates early‐stage photovoltaic performance and, importantly, predicted from calculations tolerate vacancy and antisite defects. Here, whether tolerates point defects experimentally investigated. thin films are annealed at low temperature of 100 °C under vacuum (25 Pa absolute pressure). There relative...
Abstract The formidable rise of lead‐halide perovskite photovoltaics has energized the search for lead‐free perovskite‐inspired materials (PIMs) with related optoelectronic properties but free from toxicity limitations. photovoltaic performance PIMs closely depends on their defect tolerance. However, a comprehensive experimental characterization defect‐level parameters—concentration, energy depth, and capture cross‐section—has not been pursued to date, hindering rational development...
Abstract Lead‐free perovskite‐inspired materials (PIMs) are gaining attention in optoelectronics due to their low toxicity and inherent air stability. Their wide bandgaps (≈2 eV) make them ideal for indoor light harvesting. However, the investigation of PIMs photovoltaics (IPVs) is still its infancy. Herein, IPV potential a quaternary PIM, Cu 2 AgBiI 6 (CABI), demonstrated upon controlling film crystallization dynamics via additive engineering. The addition 1.5 vol% hydroiodic acid (HI)...
Abstract The application of functional materials and devices (FM&Ds) underpins numerous products services, facilitating improved quality life, but also constitutes a huge environmental burden on the natural ecosystem, prompting need to quantify their value-chain impact using bottom-up life cycle assessment (LCA) framework. As volume FM&Ds manufactured increases, LCA calculation speed is constrained due time-consuming nature data collection processing. Moreover, framework limited in...
The general outstanding performance of amorphous-metal-oxide transistors utilizing organic polymeric gate dielectrics processed from solution and at low temperature (≤80 °C) is demonstrated. Adopting covering a range chemistries relative permittivities, the state-of-the-art charge-carrier mobility resulting devices, their capability voltage operation, extraordinary stability under bias stress are shown. As service to our authors readers, this journal provides supporting information supplied...
In this paper, we present a functional integrated plastic system. We have fabricated arrays of organic thin-film transistors (OTFTs) and printed electronic components driving an electrophoretic ink display up to 70 mm by on single flexible transparent foil. Transistor were quickly reliably configured for different logic functions additional process step inkjet printing conductive silver wires poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) resistors between or blocks....
Abstract Lead‐free perovskite‐inspired materials (PIMs) have attracted great interest in optoelectronics, as they feature electronic properties similar to mainstream lead‐based perovskites but are not burdened by the same toxicity issues. However, PIM photodetectors date delivered efficiencies and stability on par with benchmark technologies. With a focus methylammonium bismuth iodide (MA 3 Bi 2 I 9 )—a prominent lead‐free PIM—this study overcomes this challenge growing photoactive material...