Pressure‐Induced Unusual Transition of Luminescence Mechanics from Self‐Trapped Exciton to Free Exciton Emission in Lead Bromide Perovskitoids DOI
Rong Yan, Lingrui Wang, Yongheng Wang

et al.

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 29, 2024

Abstract Understanding the luminescence mechanics of metal halide perovskites is key to uncovering detailed pathways responsible for remarkable photophysical properties and engineering materials with enhanced optoelectronic properties. In this work, high pressure employed reveal self‐trapped exciton (STE) emission features a 1D lead bromide perovskitoid (HM)Pb 2 Br 6 . Upon compression, 42‐fold enhancement in intensity compared initial emission, along transfer from STE narrow free achieved These phenomena are related anisotropic compression , which results structural stiffness significant reduction distances Pb─Pb bond lengths between inter‐[Pb ] 2− chains, as well Pb─Br within three basic intra‐[Pb octahedra. provide essential insights into intriguing photophysics STEs shed new light on dramatic control enhance optical perovskites.

Language: Английский

Cerium‐Sensitized Highly Emissive 0D Cesium Cerium Terbium Chloride Alloy Nanocrystals for White Light Emission DOI Creative Commons
Tuhin Samanta, Amar Nath Yadav, Joo Hyeong Han

et al.

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(23)

Published: June 11, 2024

Abstract Recently, lanthanide‐based 0D metal halides have garnered considerable attention owing to their applications in light–emitting diodes (LEDs), X‐ray imaging, and photodetectors. Among these materials, Cs 3 TbCl 6 (CTC) nanocrystals (NCs) demonstrated promising performance imaging light‐emitting diodes. However, a drawback of CTC NCs is limited absorption coefficient the UV‐A region (315–380 nm). To address this limitation enhance region, Ce 3+ incorporated into NCs—advantageous high attributed to— 4f ‐ 5d orbital coupling. In addition, ions sensitize luminescence photoluminescence quantum yield from 75% 87%. Energy transfer Tb investigated at different dopant ratios. Furthermore, CeTbCl (CCTC) been utilized white LED devices. Understanding such competitive energy perovskite‐inspired will facilitate development novel luminescent for lighting applications.

Language: Английский

Citations

7
Pressure‐Synergistic Ligand Engineering Toward Enhanced Emission and Remarkable Piezochromism in Cadmium Sulfide Nanocrystals DOI Open Access

Feng Wang,

Pengfei Lv, Songrui Yang

et al.

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Abstract Challenge of passivating defects to harvest the high‐efficiency emission in semiconductor materials significantly limit their practical applications solid‐state lighting. Here, a robust strategy is developed through pressure‐synergistic ligand engineering achieve enhanced and remarkable piezochromism synthesized cadmium sulfide (CdS) nanocrystals (NCs) that exhibits both band‐edge (BE) strong defect emission. With increasing pressure, CdS NCs experienced from orange white Note by introducing additional oleate, marked transition achieved color blue–violet with high purity 71.4% under pressure. Furthermore, pressure‐enhanced passivation capping ligand, realized considerable BE enhancement, accompanied gradually decreased In situ high‐pressure experiments first‐principles calculations indicate interaction between indeed thus facilitating ultimately leading observed enhancement. This study endows pressure as an efficient tool enhance surface passivation, paving way for precise control over design.

Language: Английский

Citations

0
Pressure‐Promoted Self‐Trapped Exciton Emission and White‐Light Harvesting in Lead Halide Metal–Organic Frameworks at Ambient Conditions DOI Open Access

Yunfeng Yang,

Xiaohui Zhao, Junyu Liang

et al.

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 8, 2025

Abstract Lead halide metal−organic frameworks (MOFs) possess unique advantages in preparing single‐component white‐light‐emitting (WLE) materials due to their broadband emission based on self‐trapping excitons (STEs). However, order obtain high‐quality white light emission, challenges remain adjusting and optimizing the color temperature coordinates of STE emission. Herein, we have achieved tunable with Commission International de l'Eclairage (0.32, 0.38) 5777 K at ambient conditions TMOF‐8(Cl) through pressure treatment. The irreversible lattice distortion after treatment reduces distance between [PbCl] + unit TDC 2− unit. enhanced hydrogen bonding interactions electronic coupling Pb‐ s orbitals ligand energy levels turn charge transfer (CT) channel from Adjusting degree can achieve regulation relative intensity CT thereby obtaining This study provides a new perspective modulation MOFs platform for development WLE materials.

Language: Английский

Citations

0
Stimuli-responsive luminescence in doped inorganic crystals DOI
Shuohan Li, Xin Zhang, Jiangkun Chen

et al.

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(13)

Published: March 1, 2025

Inorganic crystals doped with luminescent ions have attracted considerable interest due to their abundant luminescence spectra. Particularly, these materials can show highly variable in response external stimuli, rendering widespread applications ranging from super-resolution techniques high-security information encryption. In this Perspective, we highlight the recent developments of controlling optical inorganic under various including light, temperature, water/humidity, and mechanical force. Moreover, delve into underlying mechanism discuss relevant applications, simultaneously pointing out challenges future directions for designing superior stimuli-responsive materials.

Language: Английский

Citations

0
Pressure-enhanced self-trapped exciton emission in stereochemically active SbTaO4 DOI
Dequan Jiang, Long Zhang, Chen Li

et al.

Chinese Chemical Letters, Journal Year: 2025, Volume and Issue: unknown, P. 111264 - 111264

Published: April 1, 2025

Language: Английский

Citations

0
Application of density functional theory in analyzing the structural, optoelectronic, and thermodynamics properties of RbCrCl3 and mixed NaGeCl2F perovskites: a first-principles approach DOI
Bewar M. Ahmad

Indian Journal of Physics, Journal Year: 2025, Volume and Issue: unknown

Published: May 10, 2025

Language: Английский

Citations

0
High‐Pressure Modulation of NIR Luminescence in Cr3+‐Doped Cs2AgInCl6 Double Perovskites: The Role of Ultrafast Energy Transfer DOI
Xin Liu,

Guangming Niu,

Jutao Jiang

et al.

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 4, 2024

Abstract Lead‐free halide double perovskites (DPs) have attracted much attention due to their potential applications in the field of near‐infrared (NIR) optoelectronics. However, regulating NIR luminescence properties such materials remains a challenge. In this study, it is found that Cs 2 AgInCl 6 :Cr 3+ DPs exhibit broad emission under ultraviolet excitation, with peak value 980 nm. range 9 GPa, intensity increases significantly. As pressure increases, transition from broadband narrow‐line occurs, accompanied by decrease full width at half maximum (FWHM) 260 40 nm, attributed increased local structural asymmetry and enhanced crystal around Cr ions. Ultrafast transient absorption experiments reveal changes energy transfer emergence new radiation channels, demonstrating dynamic evolution characteristics high pressure. The research results deepen understanding 3 ⁺‐doped DPs, providing strategies for designing highly efficient emitters metal DPs.

Language: Английский

Citations

1
Pressure-Induced Changes in the Phase Distribution and Carrier Dynamics of Quasi-Two-Dimensional Ruddlesden–Popper Perovskites DOI
Hai Hu,

Guangming Niu,

Jutao Jiang

et al.

The Journal of Physical Chemistry Letters, Journal Year: 2024, Volume and Issue: 15(32), P. 8142 - 8150

Published: Aug. 2, 2024

Quasi-two-dimensional (quasi-2D) perovskites hold significant potential for diverse design strategies due to their tunable structures, exceptional optical properties, and environmental stability. Due the complexity of structure carrier dynamics, characterization methods such as photoluminescence absorption spectroscopy can observe but cannot precisely distinguish or identify phase distribution within quasi-2D perovskite films correlate phases with dynamics. In this study, we used pressure modulate intralayer interlayer structures (PEA)

Language: Английский

Citations

0
Influence of Ionic Liquids on the Functionality of Optoelectronic Devices Employing CsPbBr3 Single Crystals DOI Creative Commons
Faisal Alresheedi

Crystals, Journal Year: 2024, Volume and Issue: 14(11), P. 956 - 956

Published: Oct. 31, 2024

Regulating the nucleation temperature and growth rates during inverse crystallization (ITC) is vital for obtaining high-quality perovskite single crystals via this technique. Precise control over these parameters enables growing optimized various optoelectronic devices. In study, it demonstrated that incorporating a 1-butyl-3-methylimidazolium bromide (BMIB) ionic liquid into precursor solution of cesium lead (CsPbBr3) brings about dual enhancement effect. This includes reduction in from 85 °C to 65 significant improvement both characteristics crystal properties. The CsPbBr3 grown using ITC with BMIB added (method (2)) demonstrate improved chemical physical properties (crystallinity, lattice strain, nonradioactive recombination, trap density) compared produced through conventional alone (1)). exceptional quality inclusion allowed development highly responsive device, demonstrating heightened sensitivity green light. findings investigation reveal assisted by exerts substantial impact on crystals. influence proves advantageous devices based

Language: Английский

Citations

0
Pressure‐Induced Unusual Transition of Luminescence Mechanics from Self‐Trapped Exciton to Free Exciton Emission in Lead Bromide Perovskitoids DOI
Rong Yan, Lingrui Wang, Yongheng Wang

et al.

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 29, 2024

Abstract Understanding the luminescence mechanics of metal halide perovskites is key to uncovering detailed pathways responsible for remarkable photophysical properties and engineering materials with enhanced optoelectronic properties. In this work, high pressure employed reveal self‐trapped exciton (STE) emission features a 1D lead bromide perovskitoid (HM)Pb 2 Br 6 . Upon compression, 42‐fold enhancement in intensity compared initial emission, along transfer from STE narrow free achieved These phenomena are related anisotropic compression , which results structural stiffness significant reduction distances Pb─Pb bond lengths between inter‐[Pb ] 2− chains, as well Pb─Br within three basic intra‐[Pb octahedra. provide essential insights into intriguing photophysics STEs shed new light on dramatic control enhance optical perovskites.

Language: Английский

Citations

0