A5100417034- Perovskite Materials and Applications
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- 2D Materials and Applications
- Quantum Dots Synthesis And Properties
- Organic Light-Emitting Diodes Research
- Advanced Photocatalysis Techniques
- Advanced Condensed Matter Physics
- Organic Electronics and Photovoltaics
- Strong Light-Matter Interactions
- Gas Sensing Nanomaterials and Sensors
- Advanced Memory and Neural Computing
- Thermal Expansion and Ionic Conductivity
- Electronic and Structural Properties of Oxides
- Magnetic and transport properties of perovskites and related materials
- Dispute Resolution and Class Actions
- Advancements in Semiconductor Devices and Circuit Design
- Outsourcing and Supply Chain Management
- Semiconductor materials and devices
- Digital Transformation in Industry
- Covalent Organic Framework Applications
- Solid-state spectroscopy and crystallography
- Multiferroics and related materials
- FinTech, Crowdfunding, Digital Finance
- Advanced Thermoelectric Materials and Devices
Wuhan University
2022-2025
Fudan University
2024
Zhejiang University of Technology
2023
Taizhou University
2023
Northwest Institute of Mechanical and Electrical Engineering
2023
Qingdao University of Science and Technology
2022
Henan Polytechnic University
2022
Guangdong University of Technology
2020
Berkeley College
2020
Lawrence Berkeley National Laboratory
2015-2020
PFAT promotes the secondary growth of PbI 2 clusters and early formation favorable perovskite phases via a two-step sequential deposition approach.
Lead halide perovskites have shown exceptional performance in light-emitting devices (PeLEDs), particularly producing significant electroluminescence sky-blue to near-infrared wavelengths. However, PeLEDs emitting pure-blue light at 465-475 nm are still not satisfactory. Herein, efficient and stable reported by controlling phase distribution, passivation of defects, as well surface modifications using multifunctional phenylethylammonium trifluoroacetate (PEATFA) reduced-dimensional p-F-PEA2...
Sequential deposition has been widely employed to modulate the crystallization of perovskite solar cells because it can avoid formation nucleation centers and even initial in precursor solution. However, challenges remain overcoming incomplete random transformation PbI2 films with organic ammonium salts. Herein, a unique intermediate phase engineering strategy developed by simultaneously introducing 2,2-azodi(2-methylbutyronitrile) (AMBN) both salt solutions regulate crystallization. AMBN...
A mesoporous PbI2 scaffold is demonstrated to achieve high-performance planar heterojunction perovskite solar cells. remarkable power conversion efficiency (PCE) of 15.7% achieved under AM1.5G 100 mW cm−2 irradiation with almost no hysteresis. The morphologies the scaffolds can be programmed by a controlled nucleation and growth mechanism. Correlations between film morphology device performance are established. As service our authors readers, this journal provides supporting information...
Formamidinium lead iodide (FAPbI3) perovskites are promising emitters for near-infrared light-emitting diodes. However, their performance is still limited by defect-assisted nonradiative recombination and band offset-induced carrier aggregation at the interface. Herein, we introduce a couple of cadmium salts with acetate or halide anion into FAPbI3 perovskite precursors to synergistically passivate material defects optimize device structure. Particularly, analogs, containing zero-dimensional...
Abstract Tin-lead perovskites provide an ideal bandgap for narrow-bandgap in all-perovskite tandem solar cells, fundamentally improving power conversion efficiency. However, light-induced degradation ambient air is a major issue that can hinder the long-term operational stability of these devices. Understanding specifics what occurs during this pathway provides direction device stability. In study, we investigate problem tin-lead under irradiation, counterintuitively discovering irreversible...
2D perovskite solar cells with high stability and efficiency have attracted significant attention. A systematical static dynamic structure investigation is carried out to show the details of morphology evolution. dual additive approach used, where synergy between an alkali metal cation a polar solvent leads high-quality films sandwich-type structures vertical phase segregation. Such novel can induce slab growth reduce internal surface defects, resulting in device 16.48% enhanced continuous...
Designing a hole-transport material (HTM) that guarantees effective hole transport while self-assembling at the perovskite|HTM interface with formation of an ordered interlayer, has recently emerged as promising strategy for high-performance and stable perovskite solar cells (PSCs). Hydrogen bonding (HB) is versatile multi-functional tool design small molecular HTMs. However, to date, its employment mostly limited p-i-n inverted PSCs. This study demonstrates advantages novel HTM can...
Abstract Quasi‐two‐dimensional (quasi‐2D) perovskite light‐emitting diodes (PeLEDs) are considered as one of the most potential candidates in electroluminescence territory owing to their unique quantum confinement effect and excellent thermal stability light. Nevertheless, heterogeneous energy domain distribution leads severe non‐radiative recombination process transfer, which enormously hinders performance application PeLEDs. Herein, an ambipolar amino acid, 5‐aminovaleric acid (5AVA), is...
In the emerging two-dimensional organic–inorganic hybrid perovskites, electronic structures and carrier behaviors are strongly impacted by intrinsic electron–phonon interactions, which have received inadequate attention. this study, we report an intriguing phenomenon of negative diffusion induced coupling in (2T)2PbI4. Theoretical calculations reveal that drives band alignment (2T)2PbI4 to alternate between type I II heterostructures. As a consequence, photoexcited holes undergo transitions...
Van der Waals (vdW) heterostructures host interlayer excitons that act as robust carriers of valley information and sensitive probes strongly correlated electronic phases. The formation properties these critically depend on efficient charge transfer across the heterointerface. Among various factors influencing processes, twist angle emerges a key degree freedom, allowing precise modulation stacking configuration band structure heterostructure. In this study, we perform ultrafast pump-probe...
ABSTRACT Self‐assembled inorganic halide perovskite superlattices (HPSLs) have attracted extensive attention for their well‐ordered structure and unique collective photonic properties, which differ from those of individual nanocrystals (NCs). However, the manipulation ordered HPSLs with all‐halogen alloyed halogen components, as well regulation coherent spontaneous emission across visible spectrum, remains underexplored. In this study, we employ a combination anion‐exchange reactions slow...
A solution-processed organometallic halide perovskite-based bulk heterojunction (BHJ) memory device with a configuration of indium-doped tin oxide (ITO)/CH3NH3PbI3:PVK/Al has been successfully fabricated. Under threshold voltage -1.57 V, this shows nonvolatile write-once read-many-times (WORM) effect, maximum ON/OFF current ratio exceeding 10(3). In contrast, the ITO/CH3NH3PbI3/Al showed only conductor characteristics, while PVK-based exhibited insulator behavior. Upon being subjected to...
Ultrafast sub-ps hot carrier relaxation followed by subsequent ps transport from layered 2D to 3D-like perovskite phases is demonstrated.
Carrier lifetime in flexible CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> films increases with increasing tensile strain, and conversely decreases compressive strain.
Various exciton species in transition metal dichalcogenides (TMDs), such as neutral excitons, trions (charged excitons), dark and biexcitons, have been individually discovered with distinct light-matter interactions. In terms of valley-spin locked band structures electron-hole configurations, these demonstrate flexible control emission light degrees freedom (DOFs) intensity, polarization, frequency, dynamics. However, it remains elusive to fully manipulate different on demand for practical...
Abstract Van der Waals semiconducting heterostructures, known as stacks of atomically thin transition‐metal dichalcogenide (TMD) layers, have recently been reported new quantum materials with fascinating optoelectronic properties and novel functionalities. These discoveries are significantly related to the interfacial carrier dynamics excited states. Carrier be predominantly driven by ultrafast charge transfer (CT) process; however, energy (ET) process remains elusive. Herein, ET in MoS 2...
In lead halide perovskites, organic A-site cations are generally introduced to fine-tune the properties. One of questions under debate is whether essential for high-performance solar cells. this study, we compare band edge carrier dynamics and diffusion process in MAPbBr3 CsPbBr3 single-crystal microplates. By transient absorption microscopy, band-edge constants unraveled. With replacement inorganic cations, constant increases almost 8 times compared that MAPbBr3. This work reveals...
Two-dimensional (2D) hybrid perovskite solar cells have induced widespread research interest owing to their higher stability as compared three-dimensional (3D) analogues. The photovoltaic performance, however, is still limited. Here, we report a film dominated by 3D components that are modulated formamidinium thiocyanate in the 2D PEA2FA3Pb4I13 composition. We demonstrate dimensionality transformation from 2D/3D predominantly phase presence of SCN-based treatment enhances optical absorption...
Abstract The electron‐phonon interaction is known as one of the major mechanisms determining electrical and thermal properties. In particular, it alters carrier transport behaviors sets fundamental limits to mobility. Establishing how electrons interact with phonons resulting impact on property significant for development high‐efficiency electronic devices. Here, behavior mediated by coupling in BiFeO 3 epitaxial thin films directly observed. Acoustic are generated inverse piezoelectric...