A5101590612- Perovskite Materials and Applications
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Organic Electronics and Photovoltaics
- Chalcogenide Semiconductor Thin Films
- Organic Light-Emitting Diodes Research
- Solid-state spectroscopy and crystallography
- Microstructure and mechanical properties
- Copper-based nanomaterials and applications
- 2D Materials and Applications
- ZnO doping and properties
- Advanced battery technologies research
- Advanced Antenna and Metasurface Technologies
- Thin-Film Transistor Technologies
- Electronic and Structural Properties of Oxides
- Metamaterials and Metasurfaces Applications
- Aluminum Alloy Microstructure Properties
- Graphene research and applications
- Synthesis and Properties of Aromatic Compounds
- Supercapacitor Materials and Fabrication
- Aluminum Alloys Composites Properties
- Advanced Memory and Neural Computing
- Advanced Battery Materials and Technologies
- Surface and Thin Film Phenomena
- Gas Sensing Nanomaterials and Sensors
University of Cambridge
2021-2025
Henan University of Science and Technology
2023
Nanjing University of Posts and Telecommunications
2021
National Institute for Materials Science
2020
University of Tsukuba
2020
Abstract Solar fuels offer a promising approach to provide sustainable by harnessing sunlight 1,2 . Following decade of advancement, Cu 2 O photocathodes are capable delivering performance comparable that photoelectrodes with established photovoltaic materials 3–5 However, considerable bulk charge carrier recombination is poorly understood still limits further advances in 6 Here we demonstrate beyond the state-of-the-art exploiting new conceptual understanding and transport single-crystal...
Abstract Halide double perovskites have gained significant attention, owing to their composition of low‐toxicity elements, stability in air, and recent demonstrations long charge‐carrier lifetimes that can exceed 1 µs. In particular, Cs 2 AgBiBr 6 is the subject many investigations photovoltaic devices. However, efficiencies solar cells based on this perovskite are still far from theoretical efficiency limit material. Here, role grain size optoelectronic properties thin films investigated....
The family of hybrid organic-inorganic lead-halide perovskites are the subject intense interest for optoelectronic applications, from light-emitting diodes to photovoltaics X-ray detectors. Due inert nature most organic molecules, inorganic sublattice generally dominates electronic structure and therefore properties perovskites. Here, we use optically electronically active carbazole-based Cz-Ci where Ci indicates an alkylammonium chain i number CH2 units in chain, varying 3 5, as cations...
n-Type organic electrochemical transistors (OECTs) and field-effect (OFETs) are less developed than their p-type counterparts. Herein, polynaphthalenediimide (PNDI)-based copolymers bearing novel fluorinated selenophene-vinylene-selenophene (FSVS) units as efficient materials for both n-type OECTs OFETs reported. The PNDI polymers with oligo(ethylene glycol) (EG7) side chains P(NDIEG7-FSVS), affords a high µC* of > 0.2 F cm
The charge transport–limiting factors in conjugated polymers without single-bond linkages the backbone have been identified.
The electrochemical performance of 2-dimensional hybrid perovskite electrodes for Li-ion batteries are investigated using a high-molarity electrolyte. effect changing the halide content and layering structure is systematically explored.
Organic thin-film transistors (OTFTs) with ideal behavior are highly desired, because nonideal devices may overestimate the intrinsic property and yield inferior performance in applications. In reality, most polymer OTFTs reported literature do not exhibit characteristics. Supported by a structure-property relationship study of several low-disorder conjugated polymers, here, we present an empirical selection rule for candidates textbook-like high reliability factors (100% transistors). The...
Abstract Solution‐processable near‐infrared (NIR) photodetectors are urgently needed for a wide range of next‐generation electronics, including sensors, optical communications and bioimaging. However, it is rare to find with >300 kHz cut‐off frequencies, especially in the NIR region, many emerging inorganic materials explored comprised toxic elements, such as lead. Herein, solution‐processed AgBiS 2 high frequencies under both white light (>1 MHz) (approaching 500 kHz) illumination...
Abstract Ternary chalcogenides have emerged as potential candidates for ultrathin photovoltaics, and NaBiS 2 nanocrystals (NCs) gained appeal because of their months‐long phase‐stability in air, high absorption coefficients >10 5 cm −1 , a pseudo‐direct bandgap 1.4 eV. However, previous investigations into NCs used long‐chain organic ligands separating individual during synthesis, which severely limits macroscopic charge‐carrier transport. In this work, these are exchanged short...
Abstract Conjugated polymers are promising materials for thermoelectric applications, however, at present few effective and well‐understood strategies exist to further advance their performance. Here a new model system is reported better understanding of the key factors governing properties: aligned, ribbon‐phase poly[2,5‐ bis (3‐dodecylthiophen‐2‐yl)thieno[3,2‐b]thiophene] (PBTTT) doped by ion‐exchange doping. Using range microstructural spectroscopic methods, effect controlled...
The field of perovskite optoelectronics and electronics has rapidly advanced, driven by excellent material properties a diverse range fabrication methods available. Among them, triple-cation perovskites such as CsFAMAPbI
Abstract Two-dimensional tin halide perovskites are gaining attention for their potential in high-performance field-effect transistors (FETs) due to ease of processibility and high mobility. However, complex charge transport mechanism remains poorly understood with no definitive models established. While temperature-dependent mobility analysis is a proven method constructing accurate given material system, systematic temperature dependence studies prototypical 2D perovskites, PEA₂SnI₄, have...
The migration of ionic defects and electrochemical reactions with metal electrodes remains one the most important research challenges for organometal halide perovskite optoelectronic devices. There is still a lack understanding how formation mobile impact charge carrier transport operational device stability, particularly in field-effect transistors (FETs), which tend to exhibit anomalous characteristics. Here, evolution n-type FET characteristics widely studied materials, Cs
Abstract Organic semiconductors are a family of pi‐conjugated compounds used in many applications, such as displays, bioelectronics, and thermoelectrics. However, their susceptibility to processing‐induced contamination is not well understood. Here, it shown that organic electronic devices reported so far may have been unintentionally contaminated, thus affecting performance, water uptake, thin film properties. Nuclear magnetic resonance spectroscopy detect quantify contaminants originating...
In this work, using the high-throughput density functional theory calculation method, influence of 36 alloying elements on elastic properties FCC-Cu was systematically studied, and based Labusch model, a linear relationship fitted between composition lattice parameters, shear modulus. The solid solution strengthening behavior brought about by studied quantitatively. results showed that most have potentiality in copper. change modulus effect solutions were determined elements’ positions...
The stability and strength of the grain boundary (GB) structure are critical for practical application nanocrystals. This study systematically calculates impact segregation 26 transitional alloy elements on Cu Σ11 [110](113) GB using first-principle theoretical calculation method. research findings demonstrate that there is a parabolic connection between atomic number energy TM in same period. In addition to Fe, Co, Ni, all other 23 have potential segregate GB, with Zr exhibiting strongest...
Recent reports highlight the potential of tin-based perovskite semiconductors for high-performance p-type field-effect transistors (FETs) with mobilities exceeding 20 cm2V-1s-1. However, these high mobilities--often obtained via two-probe (2P) methods on devices small channel length-to-width ratios (L/W < 0.5) operating in saturation regime at drain-source currents--raise concerns about overestimation due to contact resistance and non-ideal FET characteristics. Here, we performed gated...
The family of hybrid organic-inorganic lead-halide perovskites are the subject intense interest for optoelectronic applications, from light-emitting diodes to photovoltaics X-ray detectors. Due inert nature most organic molecules, inorganic sublattice generally dominates electronic structure and therefore properties perovskites. Here, we use optically electronically active carbazole-based Cz-Ci where Ci indicates an alkylammonium chain i number CH2 units in chain, varying 3-5, as cations 2D...
Solution-processable near-infrared (NIR) photodetectors are urgently needed for a wide range of next-generation electronics, including sensors, optical communications and bioimaging. However, there is currently compromise between low toxicity slow (<300 kHz cut-off frequency) organic materials versus faster detectors (>300 based on compounds containing toxic lead or cadmium. Herein, we circumvent this trade-off by developing solution-processed AgBiS2 with high frequencies under both...
Tailored Spacer Cations for Interlayer Charge Transfer in 2D Hybrid PerovskitesWouter Van Gompel a, Yorrick Boeije b, c, Youcheng Zhang d, Laurence Lutsen e, Sam Stranks Dirk Vanderzande ea Institute Materials Research (IMO-IMOMEC), Design (HyMaD), Hasselt University, B-3500 Hasselt, Belgiumb Department of Physics, Cavendish Laboratory, University Cambridge, Cambridge CB3 0HE, U.K.c Chemical Engineering and Biotechnology, 0AS, U.K.d Engineering, 0FA, U.K.e Imec-imomec, Wetenschapspark 1,...