A5100412501- Perovskite Materials and Applications
- Solid-state spectroscopy and crystallography
- 2D Materials and Applications
- High-pressure geophysics and materials
- ZnO doping and properties
- Crystal Structures and Properties
- MXene and MAX Phase Materials
- Photorefractive and Nonlinear Optics
- Multiferroics and related materials
- Optical properties and cooling technologies in crystalline materials
- Ferroelectric and Piezoelectric Materials
- Enzyme Structure and Function
- nanoparticles nucleation surface interactions
- Nonlinear Optical Materials Research
- Advanced Thermoelectric Materials and Devices
- Microstructure and mechanical properties
- Coral and Marine Ecosystems Studies
- Electronic and Structural Properties of Oxides
- Magnetic and transport properties of perovskites and related materials
- Semiconductor materials and devices
- Adhesion, Friction, and Surface Interactions
- Quantum Dots Synthesis And Properties
- Advanced battery technologies research
- Acoustic Wave Resonator Technologies
- Graphene research and applications
Center for High Pressure Science and Technology Advanced Research
2015-2025
Shanghai Advanced Research Institute
2025
Beijing University of Posts and Telecommunications
2024
Carnegie Institution for Science
2016-2018
Geophysical Laboratory
2016-2018
The organic-inorganic hybrid lead trihalide perovskites have been emerging as the most attractive photovoltaic materials. As regulated by Shockley-Queisser theory, a formidable materials science challenge for improvement to next level requires further band-gap narrowing broader absorption in solar spectrum, while retaining or even synergistically prolonging carrier lifetime, critical factor responsible attaining near-band-gap photovoltage. Herein, applying controllable hydrostatic pressure,...
Bond length and bond angle exhibited by valence electrons is essential to the core of chemistry. Using lead-based organic–inorganic perovskite compounds as an exploratory platform, it demonstrated that modulation compression can lead discovery new properties known compounds. Yet, despite its unprecedented progress, further efficiency boost solar cells hampered their wider bandgap than optimum value according Shockley–Queisser limit. By modulating electron wavefunction with modest hydraulic...
Significance Metastable materials often exhibit unexpected striking properties that are not available in stable state. While metastable states generally achieved by rapid cooling of from high temperature, it is imperative to explore other nonthermal routes access states, especially for heat-vulnerable materials. Here, we report work pressure, namely, a compression−decompression cycle under ambient can drive thermosusceptible organic−inorganic hybrid perovskites their state, which the show...
The discovery of elevated environmental stability in two-dimensional (2D) Ruddlesden–Popper hybrid perovskites represents a significant advance low-cost, high-efficiency light absorbers. In comparison to 3D counterparts, 2D organo-lead-halides exhibit wider, quantum-confined optical bandgaps that reduce the wavelength range absorption. Here, we characterize structural and properties as function hydrostatic pressure. We observe bandgap narrowing with pressure 633 meV is partially retained...
We report on the carrier-rotor coupling effect in perovskite organic-inorganic hybrid lead iodide (CH3NH3PbI3) compounds discovered by isotope effects. Deuterated including CH3ND3PbI3, CD3NH3PbI3, and CD3ND3PbI3 were synthesized. Devices made from regular CH3NH3PbI3 deuterated CH3ND3PbI3 exhibit comparable performance band gap, current-voltage, carrier mobility, power conversion efficiency. However, a time-resolved photoluminescence (TRPL) study reveals that exhibits notably longer lifetime...
Organic-inorganic halide perovskites possess unique electronic configurations and high structural tunability, rendering them promising for photovoltaic optoelectronic applications. Despite significant progress in optimizing the characteristics of organic cations inorganic framework, role organic-inorganic interactions determining optical properties has long been underappreciated remains unclear. Here, by employing pressure tuning, we realize continuous regulation a lead perovskite, MHyPbBr3...
Solid solution ferroelectrics are the most widely used piezoelectric material for numerous electromechanical applications, including sensors, actuators, and transducers. A milestone in ferroelectric research is discovery of morphotropic phase boundary that was first reported Pb(ZrxTi1−x)O3, which has been extensively solicited to improve performance various solid ferroelectrics, those having highest piezoelectricity known today. However, due inherent correlation between transition...
Significance Two-dimensional Dion–Jacobson (2D D-J) lead-halide perovskite is a cutting-edge material paradigm that has realized high-efficiency photovoltaic applications and synergetic chemical stability. With the addition of pressure dimension, this provides crucial platform for studying both pressure-tailored physical properties pressure-driven novel phenomena. Here, we demonstrate 2D D-J perovskites experience various transitions under pressure, such as crystalline-amorphous...
Design and exploration of high-performance nonlinear optical (NLO) materials have long been sought with the goal tunable local structures NLO properties for advanced laser technology. Thus far, design strategies second-order mainly focused on anionic groups that made great progress in development new compounds. However, few studies effects cationic components their contributions to underappreciated remain unclear. Here, by introducing pressure continuously tune Cu displacement, we...
Abstract The soft nature of organic–inorganic halide perovskites renders their lattice particularly tunable to external stimuli such as pressure, undoubtedly offering an effective way modify structure for extraordinary optoelectronic properties. Here, using the methylammonium lead iodide a representative exploratory platform, it is observed that pressure‐driven disorder can be significantly suppressed via hydrogen isotope effect, which crucial better optical and mechanical properties...
Layered semiconductors offer distinct advantages for optoelectronically responsive heterojunction devices due to their strong light–matter interactions and weak interlayer van der Waals interactions, which enable exfoliation into adjustable thicknesses. However, practical utility is often restricted by excessively wide bandgaps, limit spectral response within the visible light range reduce absorption efficiency, thereby constraining broadband detection capabilities. In this study, pressure...
Materials science exploits only properties that are available at ambience. Therefore, although high-pressure changes the physical state of all condensed matter, most extraordinary discovered vanish after decompression and cannot be utilized. Here, we demonstrate sublattice decoupling in a mixed-anion chalcohalide Rb6Re6S8I8 upon compression, which [Rb6I2]4+ framework is soft plastic, while [Re6S8I6]4- clusters hard elastic. This discrepancy rigidity allows applied pressure to selectively...
We report an unprecedented surface doping-driven anomaly in the compression behaviors of nanocrystals demonstrating that change chemistry can lead to interior bulk structure nanoparticles. In synchrotron-based X-ray diffraction experiments, titania with low concentration yttrium dopants at are found be less compressible than undoped nanocrystals. More surprisingly, unexpected TiO2(II) phase (α-PbO2 type) is induced and obvious anisotropy observed yttrium-doped TiO2, sharp contrast behavior...
Layered van der Waals (vdW) dichalcogenides are distinguished by their unique crystal structures and high structural tunability, rendering them suitable for applications in optics optoelectronics. Despite significant processes, some fundamental questions remain two-dimensional (2D) vdW dichalcogenides, such as clarifying detailed structure–property relationship further improving the optoelectronic performance. Herein, applying pressure to tune structure 2D dichalcogenide SiTe2, we realized a...
In article number 2009131, Gang Liu and co-workers conduct high-pressure isotope research to discover a significantly suppressed lattice disorder realized by H/D substitution in hybrid halide perovskites, which reveals large emission enhancement strong structural robustness isotope-functionalized perovskite materials. The CD3ND3PbI3-based device also exhibits slower degradation of photovoltaic performance, is promising for better materials-by-design more stable applications.