A5044824953- Perovskite Materials and Applications
- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Viral-associated cancers and disorders
- Cytomegalovirus and herpesvirus research
- Metal Forming Simulation Techniques
- Thin-Film Transistor Technologies
- 2D Materials and Applications
- Metallurgy and Material Forming
- Semiconductor materials and devices
- Ferroelectric and Negative Capacitance Devices
- Animal Genetics and Reproduction
- Solid-state spectroscopy and crystallography
- Electronic and Structural Properties of Oxides
- Genetics, Bioinformatics, and Biomedical Research
- Metal Alloys Wear and Properties
- Nanowire Synthesis and Applications
- Identification and Quantification in Food
- Microstructure and Mechanical Properties of Steels
- Extraction and Separation Processes
- Technostress in Professional Settings
- Magnetic Properties and Synthesis of Ferrites
Jinan University
2020-2025
Shenzhen University
2019-2023
Linköping University
2018-2023
City University of Hong Kong
2015-2018
City University of Hong Kong, Shenzhen Research Institute
2017
Chongqing University
2016-2017
Sun Yat-sen University
2013-2015
Hohai University
2008-2011
University of Languages and International Studies
2011
Anhui University of Technology
2007
Abstract Recently, Ruddlesden–Popper perovskites (RPPs) have attracted increasing interests due to their promising stability. However, the efficiency of solar cells based on RPPs is much lower than that 3D perovskites, mainly attributed poor charge transport. Herein, a simple yet universal method for controlling quality RPP films by synergistic effect two additives in precursor solution presented. achieved this show (a) high with uniform morphology, enhanced crystallinity, and reduced...
A high-performance hybrid white organic light-emitting device (WOLED) is demonstrated based on an efficient novel thermally activated delayed fluorescence (TADF) blue exciplex system. This shows a low turn-on voltage of 2.5 V and maximum forward-viewing external quantum efficiency 25.5%, which opens new avenue for achieving WOLEDs with simple structures. As service to our authors readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed...
Despite rapid improvements in efficiency and brightness of perovskite light-emitting diodes (PeLEDs), the poor operational stability remains a critical challenge hindering their practical applications. Here, we demonstrate greatly improved high-efficiency PeLEDs, enabled by incorporating dicarboxylic acids into precursor for depositions. We reveal that efficiently eliminate reactive organic ingredients emissive layers through an situ amidation process, which is catalyzed alkaline zinc oxide...
Pure-red perovskite LEDs (PeLEDs) based on CsPb(Br/I)3 nanocrystals (NCs) usually suffer from a compromise in emission efficiency and spectral stability account of the surface halide vacancies-induced nonradiative recombination loss, phase segregation, self-doping effect. Herein, "halide-equivalent" anion benzenesulfonate (BS- ) is introduced into NCs as multifunctional additive to simultaneously address above challenging issues. Joint experiment-theory characterizations reveal that BS- can...
Achieving high-performance perovskite light-emitting diodes (PeLEDs) with pure-red electroluminescence for practical applications remains a critical challenge because of the problematic luminescence property and spectral instability existing emitters. Herein, high-efficiency Rec. 2020 PeLEDs, simultaneously exhibiting exceptional brightness stability, based on CsPb(Br/I)3 nanocrystals (NCs) capping aromatic amino acid ligands featuring cation-π interactions, are reported. It is proven that...
Despite the rapid advances of red and green perovskite light-emitting diodes (PeLEDs), achieving high brightness with external quantum efficiency (EQE) remains a challenge for pure-blue PeLEDs, which greatly hinders their practical applications, such as white-light illumination in optical communication high-speed low-loss light source. Herein, we report high-performance PeLED based on mixed-halide quasi-2D perovskites incorporated zwitterionic molecule 3-(benzyldimethylammonio)...
A composite of pyrite FeS<sub>2</sub> microspheres wrapped by reduced graphene oxide (FeS<sub>2</sub>/rGO) has been synthesized a facile one-step solvothermal method and applied as an anode in lithium ion batteries (LIBs).
We show the effects of chlorine incorporation in crystallization process perovskite film based on a lead acetate precursor. demonstrate fabrication for fast grain growth with highly preferred {110} orientation upon only 5 min annealing at 100 °C. By studying correlation between precursor composition and morphology, dynamic current system is discussed. In particular, we found that both Cl are beneficial to growth. While allows process, improves crystallinity. Planar solar cells optimized...
Despite the advanced progress in power conversion efficiency (PCE), developing air-processed high-efficiency perovskite solar cells (PVSCs) for future commercialization is still challenging. Here, we report that besides general wisdom of effect moisture, oxygen air has a severe impact on quality solution-deposited films. Interestingly, as opposed to moisture induces fast crystallization PbI2 upon deposition, exacerbates wettability solution substrates. We find simply preheating substrate and...
Perovskite light-emitting diodes (PeLEDs) have recently shown significant progress with external quantum efficiencies (EQEs) exceeding 20%. However, PeLEDs pure-red (620-660 nm) light emission, an essential part for full-color displays, remain a great challenge. Herein, general approach of spacer cation alloying is employed in Ruddlesden-Popper perovskites (RPPs) efficient red precisely tunable wavelengths. By simply tuning the ratio dual cations, thickness distribution wells RPP films can...
Causes of efficiency limitation in common fluorescence and phosphorescence hybrid white organic light-emitting devices (WOLEDs) are discussed, a new device architecture is proposed to address these issues. This employs fluorescent emitting layer (EML) blue exciplex-forming cohost, which shows broad strong thermally activated delayed (TADF). Hybrid WOLEDs based on this not only allow complete triplet harvesting for light generation but also can achieve emission with high color rending indexes...
Mobile ions not only have detrimental effects on device performance but also trigger the degradation of perovskite during operation.
Abstract Quasi‐2D perovskites show great promise for light‐emitting diodes owing to suppressed non‐radiative losses enabled by the energy funneling/cascading nanostructures. However, red emission quasi‐2D perovskites, these ideal landscapes efficient perovskite (PeLEDs) can rarely be achieved due detrimental aggregation of low‐dimensional ligands in precursors, leading poor device efficiency and stability. Here, a ligand‐modulated dimensionality control strategy is explored achieve uniform...
We report reversible bipolar resistance switching behaviors in transparent indium-tin oxide (ITO)/LaAlO3/SrTiO3 memristors at room temperature. The exhibit high optical transparency, long retention, and excellent antifatigue characteristics. performances are promising for employing ITO/LaAlO3/SrTiO3 nonvolatile memory logic devices. could be attributed to the migration of positively charged oxygen vacancies from SrTiO3 substrate LaAlO3 film, resulting Poole-Frenkel emission low state...
The loading time of MAI during perovskite film formation determines the chemical composition, hysteresis, and photovoltaic performance.
Abstract Room-temperature spin-based electronics is the vision of spintronics. Presently, there are few suitable material systems. Herein, we reveal that solution-processed mixed-phase Ruddlesden–Popper perovskite thin-films transcend challenges phonon momentum-scattering limits spin-transfer in conventional semiconductors. This highly disordered system exhibits a remarkable efficient ultrafast funneling photoexcited spin-polarized excitons from two-dimensional (2D) to three-dimensional (3D)...
Although tremendous progress has recently been made in quasi-2D perovskite light-emitting diodes (PeLEDs), the performance of red PeLEDs emitting at ≈650-660 nm, which have wide prospects for application photodynamic therapy, is still limited by an inefficient energy transfer process between layers. Herein, a symmetric molecule 3,3'-(9H-fluorene-9,9-diyl)dipropanamide (FDPA) designed and developed with two functional acylamino groups incorporated into perovskites as additive achieving...
Abstract Ruddlesden–Popper perovskites (RPPs), consisting of alternating organic spacer layers and inorganic layers, have emerged as a promising alternative to 3D for both photovoltaic light‐emitting applications. The provide wide range new possibilities tune the properties even functionalities RPPs. However, preparation state‐of‐the‐art RPPs requires ammonium halides starting materials, which need be ex situ synthesized. A novel approach prepare high‐quality RPP films through in formation...
Abstract Quasi‐two‐dimensional (Q‐2D) perovskites are emerging as one of the most promising materials for photodetectors. However, a significant challenge to Q‐2D photodetection is their insufficient charge transport ability, which mainly attributed hybrid low‐dimensional n ‐phase structure. This study demonstrates that evenly‐distributed 3D‐like phases with vertical orientation throughout film can greatly facilitate and suppress recombination, outperforming prevalent phase structure...
Abstract Perovskite light‐emitting diodes (PeLEDs) have demonstrated significant potential in the display sector, attributed to their wide color gamut, narrow emission spectra, and cost‐effectiveness. Despite rapid advancements red green PeLEDs, attainment of high brightness external quantum efficiency (EQE) for blue PeLEDs remains a considerable challenge, which substantially limits practical applications white lighting optical communication. In this study, method passivation quasi‐2D...
In the field of organic solar cells (OSCs), planar heterojunctions (PHJs) have received less attention. This study demonstrates that enhancing crystallization and diffusivity nonfullerene small-molecule acceptors (NF-SMAs) through sequential deposition significantly optimizes morphology PHJ OSCs, driving notable performance enhancements. An additive 1,2,4,5-tetrabromobenzene (TBrB) is employed during deposition, enabling such desirable morphological control in OSCs. situ UV-vis absorption...
ABSTRACT Human herpesvirus 6 (HHV-6) is an important immunosuppressive and immunomodulatory virus that primarily infects immune cells strongly suppresses the proliferation of infected cells. However, mechanisms responsible for regulation suppression mediated by HHV-6 are still unknown. In this study, we examined ability HHV-6A to manipulate cell cycle progression in explored potential molecular mechanisms. We demonstrated infection with imposed a growth-inhibitory effect on HSB-2 inducing...
High performance organic photovoltaic devices typically rely on type‐II P/N junctions for assisting exciton dissociation. Heremans and co‐workers recently reported a high efficiency device with third layer which is spatially separated from the active junction; but still contributes to carrier generation by passing its energy junction via long‐range transfer mechanism. In this study authors show that there an additional mechanism contributing efficiency. Some bipolar materials (e.g.,...
Degradation mechanisms of methylammonium lead halide perovskite solar cells (PSCs) have drawn much attention recently. Herein, the bulk and surface degradation processes were differentiated for first time by employing combinational studies using electrochemical impedance spectroscopy (EIS), capacitance frequency (CF), X-ray diffraction (XRD) with particular on roles small polar molecules (MA+ H2O). CF study shows that short-circuit current density PSCs is increased H2O at beginning process...