Journal of Materials Chemistry C
·
2025
·
IF 5.1
Muhammad Sohail,Zulfiqar Ali,M. Sohail,Areej S. Alqarni,Intikhab Alam,Nimra Razzaq,Fazl ullah,Qiuyun Ouyang
Halide perovskites, particularly cesium lead iodide (CsPbI3), have garnered significant attention due to their remarkable properties, including strong absorbance across the visible to near-infrared spectrum and a unique electronic structure that enhances their nonlinear optical (NLO) and optoelectronic applications. In this study, CsPbI3 was synthesized using a hot injection technique and incorporated into a methyl methacrylate (MMA) matrix through polymerization to form CsPbI3/PMMA organic glasses. The NLO properties of these glasses were characterized using the Z-scan technique with a nanosecond pulse laser at an excitation wavelength of 532 nm. Notably, the CsPbI3/PMMA organic glasses exhibited a transition from saturable absorption (SA) to reverse saturable absorption (RSA) upon adjusting the input energy. Furthermore, by integrating a fiber ferrule coating-based CsPbI3 saturable absorber (SA) into the laser cavity, we successfully realized a passively Q-switching (PQS) laser with a minimum pulse duration of 4.7 μs and a signal-to-noise ratio (SNR) of 50 dB at 1.55 μm, respectively. Consequently, the experimental findings indicate that CsPbI3NP-based saturable absorbers (SAs) exhibit performance characteristics that are either comparable to or surpass those of conventional nanoparticle-based SAs. This observation underscores the significant potential of CsPbI3-based SAs for applications in pulsed laser sources, suggesting their viability as advanced materials for enhancing laser performance and stability.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2020
·
IF 2.029
Kun He,Yanqing Zhu,Zhuoneng Bi,Xiaoli Chen,Xiudi Xiao,Gang Xu,Xueqing Xu
In this paper, the highly emissive CsPbI 3 perovskite quantum dots (QDs) with good stability are successfully synthesized with trioctylphosphine (TOP) as surface ligands. Furthermore, a facile and fast anion exchange is realized at the interface of nonpolar CsPbX 3 solution and aqueous hydrohalic acid. Perovskite QDs can react with halide ions at room temperature swiftly to adjust their ratio of halogens and then the emission. The photoluminescence (PL) can be tuned over wide spectral region (423.0–670.5 nm). And this work also provides a fast avenue to tune the emission of halide perovskite QDs.
研究领域:
纳米材料
·
光电子学
·
钙钛矿量子点
·
发光材料
·
阴离子交换化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 35
·12302-12307
·
IF 7.059
Xuyuan Bao,Mingze Li,Jing Zhao,Zhiguo Xia
CsPbI3 perovskite nanocrystals (NCs) are generally unstable, with low photoluminescence quantum yield (PLQY) and show deep red emission not suitable for optoelectronic applications. Herein, we propose a facile postsynthetic anion exchange method to enhance PLQY and stability via the controlled addition of ZnBr2 solution, in which the emission peak is adjusted from 690 nm to 550 nm and the PLQY was enhanced from about 50% to near unity (98%). We further unveiled the ion exchange kinetics of the rapid transitions between two phases (CsPbI3 and CsPbBrI2) within 40 minutes, and also demonstrated that the electron trap and hole trap transformed mutually with the increase of halogen enabling the variable PLQYs. Moreover, the as-prepared CsPbBrI2 NCs exhibit enhanced stability under UV irradiation and in water compared with that of pristine CsPbI3 NCs. The good stability and highly efficient narrow-band emission centered at 630 nm for CsPbBrI2 NCs show its potential application-possibility in liquid-crystal display backlight. It is suggested that the postsynthetic ZnBr2 halogen ion exchange method demonstrated here opens a new door for the synthesis of high-performance halide perovskite nanocrystals and the development of illumination and display applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Physics
·
2021
·
IF 9.298
Chengyuan Tang,Xinyu Shen,Siyao Yu,Yuan Zhong,Zhenyu Wang,Junhua Hu,Min Lu,Zhennan Wu,Yu Zhang,William W. Yu,Xue Bai
Inorganic CsPbX 3 (X = Cl, Br, I) perovskite nanocrystals (PNCs) have a great promise for LED applications due to their high brightness and tunable emission. However, the long chain capping ligands such as oleylamine and oleic acid function are electrically insulating layers to hinder the charge carrier injection and transport, limiting the device performances. To overcome the limitations, p -iodo-D-phenylalanine (PIDP) was used in the post-treatment process of PNCs to partially substitute the long insulating ligands to improve the conductivity of CsPbI 3 PNC films. Besides, the surface defects were also passivated by PIDP, increasing the radiative decay rate and decreasing the non-radiative decay rate, thus enhanced the photoluminescence quantum yield of the PNCs. As a result, highly efficient PNC LEDs were obtained with an external quantum efficiency of 12.4% and a peak luminance of 2000 cd m −2 .
研究领域:
材料科学
·
光电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Huiling Zhu,Cuixia Hao,Xin Li,Yao Qi,Xuesong Zhu,Yucheng Miao,Rui Liu,Jianxu Ding
Black phase CsPbI3 quantum dots (QDs) have garnered significant research interest due to their remarkable properties in optoelectronic applications. However, their inherent instability and low phase stability often lead to an undesired transformation into an orthorhombic yellow phase. In this study, we propose an innovative approach to synthesize Ag+ doped CsPbI3 QDs in a nonvacuum environment. The theoretical calculations and experimental results demonstrate that Ag+ doping substantially increases the formation energy and Goldschmidt tolerance factor, resulting in an enhanced thermodynamic stability and photoluminescence quantum yield (PLQY). The resulting Ag+ doped CsPbI3 QDs exhibit an impressive PLQY of up to 97% and maintain their black phase for over 60 days. This novel nonvacuum synthesis approach holds great potential for producing high-quality all-inorganic perovskite CsPbX3 QDs. To demonstrate the practical applications, we fabricate a white light-emitting diode (WLED) using the Ag+ doped CsPbI3 QDs, achieving Commission Internationale de I’Eclairage (CIE) color coordinates of (0.36, 0.26). These findings highlight the broad prospects of CsPbI3 QDs in lighting and display technologies.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Zuxiong Xu,Jianwei Wang,Zhongyu Liu,Cong Xiao,Jiahao Wang,Ning Liu,Jing Zhang,Like Huang,Ziyang Hu,Yuejin Zhu,Xiaohui Liu
Inorganic NiOx has attracted tremendous attention in organic–inorganic hybrid perovskite solar cells (PSCs) in recent years but is relatively less used in all-inorganic PSCs. In this study, we have discovered and confirmed the detrimental interfacial reaction between NiOx and DMAI-containing CsPbI3 inorganic perovskites. Thus, a self-assembled monolayer, Br-2PACz, is employed to modify the NiOx surface to obstruct the adverse interfacial reaction and further improve the device performance. The results demonstrate that Br-2PACz modification on NiOx can also improve interface contact, perovskite film morphology, and energy level alignments. Consequently, a champion power conversion efficiency (PCE) of 19.34% with a high open-circuit voltage (VOC) of 1.15 V is obtained for inverted NiOx/Br-2PACz-based CsPbI3 PSCs compared to the reference NiOx-based PSC with a moderate PCE of 15.16% (VOC 1.05 V). Moreover, the stabilities of both CsPbI3 films and devices exhibited significant enhancement after Br-2PACz modification. The unpacked PSCs could maintain 80, 73, and 89% of the initial efficiency after aging in 30–35% RH for 960 h, heating at 60 °C for 48 h, and continuous illumination for 284 h, respectively, highly superior to the reference devices. Our work offers a facile and effective approach for developing high-performance inverted NiOx-based CsPbI3 PSCs.
研究领域:
材料科学
·
光伏技术
·
纳米技术
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
VACUUM
·
2026
·
IF 3.9
Longxun Teng,Xin Li,Yuanxin Chunyu,Jiaxiang Liang,Xinyue Shao,Haiqing Sun,Xiaoyuan Zhan,Weiwei Zhang,Rui Liu,Jianxu Ding,Huiling Zhu
This study presents a water vapor-assisted solid-state sintering strategy to fabricate CsPbI 3 @SiO 2 perovskite composites. Through high humidity and temperature, CsPbI 3 nanocrystals are efficiently encapsulated within a SiO 2 matrix, resulting in dramatically enhanced stability. The composite retains over 85 % of its initial luminescence after 360 days in ambient conditions and demonstrates excellent resistance to polar solvents and acids. Due to its high stability, the composite exhibits promising performance in white light-emitting diodes (WLEDs) and information encryption applications, providing a viable pathway toward practical perovskite-based devices.
✓ 已验证
产品关联
DOI
高影响因子
Photonics
·
2021
·Vol. 9
·期 1
·3
·
IF 2.676
Genjie Yang,Dianli Zhou,Jiawen Li,Junsheng Yu
The quality of active layer film is the key factor affecting the performance of perovskite solar cells. In this work, we incorporated CsPbI3quantum dots (QDs) materials into the MAPbI3perovskite precursor to form photoactive layer. On one hand, CsPbI3QDs can be used as nucleation center to enhance the compactness of the perovskite film, and on the other hand, partially CsPbI3QDs can be dissociated as anions and cations to passivate vacancy defects in the perovskite active layer. As a result, the film quality of the active layer was improved remarkably, thus exciton recombination was reduced, and carrier transfer increased accordingly. The devices based on doped-CsPbI3QDs film had higher short circuit current, open circuit voltage and filling factor. Finally, the power conversion efficiency (PCE) was greatly enhanced from 14.85% to 17.04%. Furthermore, optimized devices also exhibited better stability. This work provides an effective strategy for the processing of high-quality perovskite films, which is of great value for the preparation and research of perovskite photoelectronic devices.
研究领域:
光伏技术
·
材料科学
·
纳米材料
·
太阳能
✓ 已验证
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2026
·
IF 3.6
Yiru Tai,Ning Li,Zhirui Zhang,Jie Zhang,Bao Xiao,Bin-Bin Zhang
The development of efficient room-temperature broadband emitters based on self-trapped excitons in low-dimensional perovskites has been hindered by severe thermal quenching, which stems from insufficient thermal activation energy (Ea) and poorly optimized electron–phonon interactions. Here, we introduce a bromine-alloyed strategy in quasi-one-dimensional δ-CsPbI3 to enhance the self-trapped luminescence efficiency. Structural analysis reveals that Br incorporation selectively tunes the distortion of the PbX6 octahedra. This targeted lattice distortion acts as a unified design parameter: it concurrently deepens the potential wells for self-trapped excitons, thereby increasing Ea by more than an order of magnitude (from 7.4 to 117.2 meV) to suppress thermal quenching, while also optimally moderating the electron–phonon coupling strength (Huang–Rhys factor, S). Systematic compositional optimization shows that CsPb(I0.35Br0.65)3 achieves the optimal balance, with a large Ea (82.9 meV) for stability and a moderated S (∼40) for efficient radiative recombination. This work elucidates the structural origin for the synergistic tuning of photophysical parameters, providing quantitative design principles for tailoring efficient self-trapped emission in low-dimensional perovskites and advances their prospects for solid-state lighting and photonic applications.
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2026
·
IF 29.1
Jongbeom Kim,Woo Hyeon Jeong,Junzhi Ye,Allison Nicole Arber,Vikram,Donghan Kim,Yi-Teng Huang,Yixin Wang,Dongeun Kim,Dongryeol Lee,Chia-Yu Chang,Xinyu Shen,Sung Yong Bae,Ashish Gaurav,Ye In Kim,Jinkyu Yang,Boseung Je,Changsoon Cho,Akshay Rao,Henry J. Snaith,M. Saiful Islam,Bo Ram Lee,Myoung Hoon Song,Robert L. Z. Hoye
Strongly-confined perovskite nanoplatelets (PeNPLs) offer opportunities not found in conventional isotropic nanocubes, especially in producing linearly polarized light, as well as enhancing outcoupling through control over the transition dipole moment. But this requires ultrathin nanoplatelets with three or fewer monolayers of PbI 6 octahedra across the thickness, which are challenging to synthesise uniformly, and their luminescence is strongly affected by surface defects. Together, these limit the performance of ultrathin PeNPLs in light-emitting diodes (LEDs). Here, we address these challenges with an ancillary ligand engineering strategy. We demonstrate that ligands with phosphoryl functional groups strongly bind to the perovskite surface, while having an organic backbone that is not sterically bulky ensures high ligand density. By modulating nucleation and growth, these ancillary ligands lead to monodisperse PeNPLs that stack more uniformly when self-assembled into superlattices, with suppressed agglomeration. As a result, from edge-up PeNPL superlattices, we achieve an enhanced degree of polarization, while from face-down PeNPL superlattices, we achieve enhanced outcoupling that results in LEDs with 13.1% external quantum efficiency, the highest reported for ultrathin PeNPL LEDs. This work establishes ancillary ligand-induced synthesis as a decisive route to achieve uniform nanoplatelets with robust orientation control, enabling full utilization of the multifunctionality of anisotropic PeNPLs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2026
·
IF 17.3
Xizheng Ding,Cai Luo,Ziyi Fu,Shuo Li,Nannan Hu,Yi Wang,Zhixiang Yu,Jian Zhao,Baoli Liu,Xiaofeng Fan,Wenxu Yin,Xiaoyu Zhang,Yang Guo,Changzhi Gu
Precise control over spontaneous emission is central to next-generation quantum-dot light sources, yet colloidal emitters generally radiate into weakly structured spectral, angular, and polarization channels. Quasi-bound states in the continuum (Quasi-BIC) overcome this limitation by providing high Q-factors, symmetry-defined near-fields, and controlled radiative leakage. Here we realize all three advantages in a single platform by coupling red-emitting CsPbI3 quantum dots (QDs) to a symmetry-protected plasmonic quasi-BIC hosted by a one-dimensional gold grating. By jointly engineering the grating parameters and an atomic-layer-deposited Al2O3 spacer, we match the quasi-BIC (finite radiative leakage) resonance to the ∼690 nm emission of the QDs, enabling efficient near-field coupling while suppressing direct metal-induced quenching. Compared with a planar QD film, the grating-coupled structure achieves a peak photoluminescence (PL) enhancement of more than 4-fold. The emission response is strongly governed by the symmetry of the plasmonic mode: the PL intensity exhibits a pronounced dependence on the incident pump polarization, with a polarization anisotropy (PA) as high as 85.4%, while the emitted light itself reaches a degree of polarization (DOP) of 16.5%. In addition, the hybrid structure produces directional and collimated red emission with a divergence as low as 3°, accompanied by a clear wavelength–angle correlation. These results show that plasmonic quasi-BIC can serve not only as field-enhancing resonances but also as symmetry-defined optical channels for engineering QD emission. This work presents a compact strategy for integrating QD with metallic metasurfaces toward QD light sources featuring tunable emission direction and divergence, polarization sensitivity, and color selectivity.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Haohan Hu,Yi Zhu,Siyu Qin,Wenguang Dai,Yuan Tong,Zheng Chen,Yulong Zhao,Xiuquan Gu
Metal halide perovskite quantum dots (PQDs) are promising for optoelectronic applications, yet CsPbI 3 PQDs face challenges from intrinsic defects, poor stability, and limited processability. Herein, we report a dual-ligand synergistic passivation strategy (DLSPS) combining La(acac) 3 and benzamide, coupled with EPDM encapsulation. The strategy employs La(acac) 3 for lattice defect compensation and La 3 + fills Pb 2+ vacancies while benzamide for surface passivation, synergistically suppressing non-radiative recombination and ion migration. EPDM encapsulation forms a hydrophobic network, enhancing processability and environmental robustness. Density functional theory (DFT) calculations confirm strong and selective binding of ligands to CsPbI 3 , which achieve a high PLQY of 70.11%, narrow emission at 688 nm, and exceptional stability under thermal, aqueous, and UV stresses. Red LEDs fabricated with CsPbI 3 (DLSPS)/EPDM films deliver deep-red emission (CIE: 0.73, 0.27) and retain 70% of initial intensity after 72 h operation. This scalable strategy bridges material engineering with device fabrication, advancing industrialization of perovskite-based red LEDs.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）