Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Although seeking an effective strategy for further improving their optical properties is a great challenge, two-dimensional (2D) halide perovskites have attracted a significant amount of attention because of their performance. In this regard, the pressure-induced emission accompanied by a remarkable pressure-enhanced emission is achieved without a phase transition in 2D vacancy-ordered perovskite CsBiCl nanocrystals (NCs). Note that the initial CsBiCl NCs possess extremely strong electron-phonon coupling, leading to the easy annihilation of trapped excitons by the phonon. Upon compression, pressure could effectively suppress phonon-assisted nonradiative decay and give rise to an intriguing emission from "0" to "1". Both the weakened electron-phonon coupling and the relaxed halide octahedral distortion benefiting from the vacancy-ordered structure contributed to the subsequent enhanced emission. This work not only elucidates the underlying photophysical mechanism but also identifies pressure engineering as a robust means for improving their potential applications in environmentally friendly solid-state lighting at extremes.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.jpclett.2c03332 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Structural evolution and photoluminescence tuning of Bi3+/Sb3+ doped zero-dimensional perovskite [(CH3)3S]2SnCl6 under pressure.
J Chem Phys
September 2025
Hubei Provincial Key Laboratory of Chemical Equipment Intensification and Intrinsic Safety, Hubei Provincial Engineering Technology Research Center of Green Chemical Equipment, School of Mechanical and Electrical Engineering, Hubei Key Laboratory of Optical Information and Pattern Recognition, Schoo
The tunable photoluminescence (PL) response of Bi3+/Sb3+ doped zero-dimensional perovskite [(CH3)3S]2SnCl6 via pressure-induced structure evolution is investigated using high-pressure techniques and density-functional theory calculations. In contrast to the rigidification of [SnCl6]2-/[SbCl6]3- octahedra by Sb3+ ions, Bi3+ ions trigger the distortion of the [SnCl6]2-/[BiCl6]3- octahedra at a relatively lower pressure, and even a cubic-to-trigonal phase transition of Bi3+ singly doped [(CH3)3S]2SnCl6 occurs at higher pressures due to its pressure sensitivity, wherein, the organic (CH3)3S+ chains enhance the flexibility of [(CH3)3S]2SnCl6 host structure. For Bi3+/Sb3+ doubly doped [(CH3)3S]2SnCl6, the two metal ion dopants interact with each other, accompanied by synergistic lattice distortion, resulting in novel self-trapped exciton emission behaviors in the host that is distinct from the single-ion doping effects.
View Article and Find Full Text PDFSteric pressure in heteropentacenes modulates the photophysical properties - a molecular design strategy for functional materials.
Chem Sci
August 2025
Faculty of Chemistry (Organic Chemistry), CENIDE and Center of Medical Biotechnology (ZMB), University of Duisburg-Essen Universitätsstraße 7 45141 Essen Germany
Discovering the versatile ability of environment-independent solution and solid-state emission (SSSE) enabled new possibilities of fine-tuning photophysical properties, targeting specific organelles, or developing remarkable materials. Herein, we report an unprecedented design concept for SSSE by employing the "magic methyl" effect in a series of alkylated heteropentacyclic luminophores R8, Y8, and G8. Implementing an increasing amount of -methyl groups influences the vertical electronic transitions, tuning the emission colors from red over yellow to green and inverting the preferred state of luminescence from solution to solely the solid-state or even both.
View Article and Find Full Text PDFBrightening self-trapped exciton emission in 2D metal-organic chalcogenolates via argentophilicity-mediated anisotropic compression.
Nat Commun
August 2025
School of Materials Science and Engineering, Peking University, Beijing, China.
An emerging class of two-dimensional semiconductor materials, metal-organic chalcogenolates (MOCs), have garnered significant attention due to the strong excitonic effects arising from their intrinsic soft, hybrid multiquantum-well structures. However, modifying excitonic transitions that strongly couple to the argentophilic networks and constructing their structure-property relationships in MOCs remain daunting challenges. Here, we use silver phenylselenolate (AgSePh) as a model system to manipulate excitonic behavior and uncover the fundamental photophysical mechanisms through pressure engineering.
View Article and Find Full Text PDFForce-Light-Electric Three-Dimensional Dynamic Mechanism of Room-Temperature Phosphorescence Materials under Hydrostatic Pressure.
J Phys Chem Lett
July 2025
Shandong Province Key Laboratory of Medical Physics and Image Processing Technology, Institute of Materials and Clean Energy, School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
Adaptive deformation display technology imposes new demands on core materials and devices, as traditional mechanical and structural flexibility struggles to meet the requirements of high resolution and high reliability. Intrinsically flexible molecular materials that combine mechanical deformation properties with optoelectronic functionalities offer a unique technological pathway for adaptive deformation displays. However, current research predominantly focuses on the single-dimensional properties of room-temperature phosphorescence (RTP) materials, which limits a comprehensive understanding of their stimuli-responsive properties.
View Article and Find Full Text PDFPressure-dependent exciton absorption and photoluminescence in colloidal InAs/ZnSe core/shell quantum dots.
J Chem Phys
July 2025
Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA.
We investigated the pressure-dependent exciton absorption and photoluminescence (PL) properties of colloidal InAs/ZnSe core/shell quantum dots (QDs) emitting near-infrared (NIR) photons, an environmentally friendly alternative to heavy-metal-containing NIR QDs. A detailed analysis of exciton absorption and emission spectra was conducted in the pressure range of 0-10 GPa, focusing on the energy shifts, PL intensity, and lineshape changes with pressure. The pressure coefficients for exciton absorption and PL peaks were ∼70% of the bulk InAs value, with enhanced bandgap nonlinearity tentatively attributed to the higher bulk modulus of QDs compared to bulk material.
View Article and Find Full Text PDF