JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Chengjie Gao,Peng Yu,Huaying Yang,Mingsheng Wang,Ye Cao,Junli Nie,Wei Cao,Meidan Que,Weidong Zhu,Peng Zhong,Xiaohua Ma
Construction of perovskite quantum dots (PQDs)/Metal-Organic Frameworks (MOFs) nanocomposites is anticipated to simultaneously enhance PQDs stability and expand functionality. However, pivotal challenges still exist, such as difficulty in synthesis, unclear interactions between PQDs and MOFs, and expansion of new applications. Herein, a straightforward strategy is proposed to obtain the PQDs/MOFs nanocomposites (i.e., CsPbBr 3 /PCN-333(Fe)) by surface treatment of CsPbBr 3 PQDs using PCN-333(Fe) MOF. The anchoring effect is conferred by the strong interaction of the abundant carboxylate group of PCN-333(Fe) with the uncoordinated Pb 2+ on the surface of PQDs, thus passivating such defects of PQDs. Besides, the PCN-333(Fe) with a large specific surface area of 2237 m 2 /g provides an excellent matrix for uniform spatial distribution of CsPbBr 3 PQDs. The PQDs/MOFs nanocomposites exhibit significant photoluminescence (PL) enhancements (6.5 times that of CsPbBr 3 ) and improved stability in air compared with CsPbBr 3 . At last, the fluorescence probe based on PQDs/MOFs nanocomposites shows a greatly-improved sensitivity for selective detection of Cu 2+ in hexane, with the limit of detection ( LOD ) as low as 1.63 nM, compared to 2.89 nM for pure CsPbBr 3 probe. This work offers a facile way to prepare PQDs/MOFs nanocomposites, which is applicable for widespread applications such as optoelectronics, photocatalysis, sensors, and bioimaging.
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高影响因子
Advanced Science
·
2025
·Vol. 12
·期 26
·2501875
·
IF 14.1
Bao Xiao,Yuquan Wang,Ning Ding,Haoming Qin,Nannan Shen,Xuchang He,Qihao Sun,Yihui He
Perovskite semiconductor cesium lead bromide (CsPbBr 3 ) has demonstrated great promise as a new-generation gamma-ray detector. However, substantial challenges still present in reproducibly achieving optimal spectroscopic performance. The specific strategy for producing spectroscopic-grade CsPbBr 3 crystals with high reproducibility and uniformity are still not clarified. Herein, efficient zone refining processing is developed for CsPbBr 3 crystals that facilitates impurity segregation to achieve an ultrahigh purity level of ≈1.42 ppm, therefore lowers trap density and balances charge transport. In a typical 30 mm diameter zone-refined CsPbBr 3 ingot, all wafers exhibited remarkable energy resolutions of 6–12% and 3–8% for 241 Am and 57 Co γ-rays under comparable electric fields. The crystals also exhibited an ambipolar charge transport characteristic, resemble to elemental semiconductors, with equivalent hole and electron mobility-lifetime products averaging 5.42 × 10 −3 and 2.27 × 10 −3 cm 2 ∙V −1 , respectively. Consequently, over 95% of wafers achieved energy resolutions below 5% whereas 70% exceeded 3% for 137 Cs γ-rays, demonstrating exceptional reproducibility and uniformity. Notably, a champion energy resolution of 1.3% with an outstanding photopeak-to-Compton (P/C) ratio of ≈5.3 is attained in an ambipolar planar detector. It is anticipated that this work shall expedite scalable manufacturing and practical applications of CsPbBr 3 detectors.
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CHEMISTRY OF MATERIALS
·
2021
·
IF 9.811
Tianyuan Liang,Wenjie Liu,Xiaoyu Liu,Yuanyuan Li,Wenhui Wu,Jiyang Fan
The instability of the metal halide perovskites upon exposure to moisture or heat strongly hampers their applications in optoelectronic devices. Here, we report the large-yield synthesis of highly water-resistant total-inorganic green luminescent CsPbBr3/CsPb2Br5 core/shell heteronanocrystals (HNCs) by developing an in situ phase-transition approach. It is implemented via the water-driven phase transition of the original monoclinic CsPbBr3 nanocrystal and the resultant tetragonal CsPb2Br5 nanoshell has a small lattice mismatch with the CsPbBr3 core, which ensures formation of an epitaxial interface for the synthesised CsPbBr3/CsPb2Br5 HNCs. These HNCs maintain nearly 100% of the original luminescence intensity after immersion in water for 11 months and the luminescence intensity drops only to 81.3% at 100 °C. Transient luminescence spectroscopy and density functional theory calculation reveal that there are double radiative recombination channels in the core CsPbBr3 nanocrystal, and the electron potential barrier provided by the CsPb2Br5 nanoshell significantly improves the exciton recombination rate. A prototype quasi-white light-emitting device based on these robust CsPbBr3/CsPb2Br5 HNCs is realized, showing their strong competence in solid-state lighting and wide color-gamut displays.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xinru Ding,Xinxing Zhang,Rui Ding,Tao Wen,Ziqun Wang,Lei Sun,Wenzhong Yang,Ling Huang,Hui Xu
A novel ternary UiO-66- g -P4VP/CsPbBr₃ composite is rationally designed. • It achieves a high CO₂ reduction rate of 85.2 μmol g −1 h −1 under visible light. • The P4VP interlayer acts as a CO₂ adsorber and charge-transfer bridge. • A direct Z -scheme mechanism ensures efficient charge separation. Polymer interfacial engineering is developed to overcome the intrinsic charge-transfer barriers and instability caused by insulating ligands in MOF/perovskite composites. By covalently grafting poly(4-vinylpyridine) (P4VP) brushes onto UiO-66-NH₂, followed by in-situ confined growth of CsPbBr₃ quantum dots (QDs), we construct a ternary UiO-66- g -P4VP/CsPbBr₃ (UPC) photocatalyst. The P4VP interlayer serves triple synergistic functions including coordinating Pb 2+ to anchor ultrasmall monodisperse QDs, providing a charge transfer bridge for interfacial charge transfer, and enriching local CO₂ concentration. The optimized UPC-2 achieves an electron consumption rate of 85.2 μmol·g −1 ·h −1 for CO₂ reduction under visible light, 8.5 times that of pristine UiO-66-NH₂, with outstanding stability. Comprehensive spectroscopic, photoelectrochemical, and transient photovoltage analyses confirm a direct Z -scheme charge transfer mechanism that preserves strong redox potentials while suppressing interfacial recombination. This work establishes a versatile polymer-bridge strategy for designing durable, high-performance MOF/perovskite heterojunctions for solar fuel production. Download: Download high-res image (311KB) Download: Download full-size image
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Xinyu Yao,Bobo Yang,Lan Li,Jinfang Kong,Canyun Zhang,Fengchao Wang
Essential Role of Eu 3+ in low-lead CsPbBr 3 QD glass. • Tunable Green-to-Red Emission via Eu/Pb Ratio. • Eu 3+ induced lattice contraction and PL blue shift. • Optical temperature sensing based on dual emission. CsPbBr 3 perovskite quantum dots (QDs) have garnered considerable attention owing to their outstanding optical properties. However, their practical applications are hindered by poor stability and the toxicity of lead, whereas lead-free alternatives often compromise optical performance. In this study, Eu 3 + -incorporated low-lead CsPbBr 3 QDs embedded in borosilicate glass were successfully fabricated via melt quenching and heat treatment. The molar fraction of PbBr 2 in the glass system is as low as 0.0367–0.0612%, corresponding to a lead reduction of approximately 97% compared with conventional CsPbBr 3 QD glasses. We demonstrate that Eu 3+ ions are essential for the precipitation of CsPbBr 3 QDs under low-lead conditions. Meanwhile, Eu 3+ provides red emission, thereby creating dual emission centers. The green-to-red emission ratio can be finely tuned by varying the Eu/Pb ratio. In addition, Eu 3+ substitution for Pb 2+ induces lattice contraction, which causes a blue shift of the emission peak of CsPbBr 3 QDs. Temperature-dependent photoluminescence (PL) spectra of the Eu0.6 Pb0.08 sample reveal that the fluorescence intensity ratio (FIR) increases monotonically with increasing temperature from 100 to 300 K, with maximum absolute and relative sensitivities of 3.77 × 10 −2 K −1 and 5.55 × 10 −1 K −1 , respectively. This work demonstrates the potential of low-lead perovskite QD glasses for optical temperature sensing.
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OPTICAL MATERIALS
·
2026
·
IF 4.3
Shuai Yang,Jialin Wang,Han Bao,Weili Liu,Jinshu Li,Jiao Xu,Hongwei Liang,Yiming Yang
Self-powered perovskite photodetectors (PDs) have emerged as an attractive platform for energy-efficient and low-power optoelectronic applications. However, achieving superior self-powered photodetection performance with wide linear dynamic range (LDR) and high-temperature stability remains challenging, due to the formidable defect-assisted ion migration and thermally activated carrier injection. Here, we demonstrate a thermally robust self-powered PD incorporated with a high-quality chemical vapor deposition grown CsPbBr 3 nanoplate and engineered Schottky contacts. The asymmetric Ti and Au contacts establish an effective built-in electric field that enables self-powered operation, and the adequate Schottky barrier efficiently suppresses thermally activated dark current. Meanwhile, the high crystalline quality of CsPbBr 3 nanoplates, characterized by a low defect density, minimizes trap-assisted carrier transport or ion migration, which contributes to the reduction of dark current and enhancement of photodetection robustness at elevated temperatures. As a result, the device exhibits impressive self-powered photodetection figures of merit with an ultralow dark current (∼-0.25 pA), a wide LDR of 137 dB, and a reliable operation up to 450 K. Notably, the responsivity is further enhanced at elevated temperatures. This work provides a clear physical strategy for realizing outstanding self-powered perovskite PDs with high-temperature robustness.
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CRYSTENGCOMM
·
2026
·
IF 2.4
Jianing Hu,Fangxiong Tang,Yan Zhu,Yuzhe Zhang,Huaxing Gou,Haoyan Ye,Siyu Han,Hengyong Bu,Run Xu
The growth of all-inorganic CsPbBr3 single crystals requires a temperature below 88 °C in order to avoid the orthorhombic to tetragonal phase transition. Here, we report a low-temperature inverse temperature crystallization strategy based on a DMSO/n-butanol (NBA) mixed solvent system. Unlike the other alcohols, monotonic retrograde solubility behavior of CsPbBr3 in the temperature range of 20-80 °C is achieved only when NBA is adopted, which enables crystal growth at a reduced temperature with a high yield of up to 44.4%. The resulting CsPbBr3 crystals show high phase purity without CsPb2Br5, a narrow XRC FWHM down to 0.035°, high optical transmittance (75.4%), and prolonged carrier lifetimes (τ2= 55.4 ns, τavg ≈ 50.2 ns). Schottky-type detectors exhibit a low dark current of 8 nA at 100 V and a hole μτ of 0.67 × 10-4 cm2 V-1, demonstrating the promise of this solvent-engineering route for radiation detection applications.
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ANALYST
·
2025
·
IF 3.3
Jiayan Chen,Jie Gao,Cancan Wang,Yang Sun,Dandan Cao,Xinli Wang,Jiyuan Wu,Ziyue Jiao,Xiao Huang,Meng Zhao,Yi Wang,Xi-Cheng Ai,Li-Min Fu,Jian-Ping Zhang
All-inorganic lead halide perovskite quantum dots (PQDs) exhibit outstanding photoluminescence (PL) for optical sensing, yet their severe instability in aqueous environments critically undermines reproducibility and sensitivity. Here, we develop waterproof PQD-based films that maintain 99.8% PL intensity after 2-hour water immersion, overcoming the longstanding hydration-induced degradation challenge. Notably, the films demonstrate amplified spontaneous emission (ASE) with an ultralow threshold of 1.72 μJ/cm2, achieving emission intensity one order of magnitude stronger than conventional PL. Leveraging these impressive properties, we pioneer an ASE-driven optical platform for in-situ monitoring of water-soluble food additives. As a proof of concept, by selecting tartrazine as the detection object, ultrahigh-speed detection at 108 fps is obtained with superior linearity (R2 = 0.999, 0–3.5 μM) for additive concentration quantification, which is unaccessible via existing PL methods under identical experimental conditions. This work establishes a paradigm shift for perovskite-based sensors by transforming material instability into a stabilized photonic advantage.
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高影响因子
CERAMICS INTERNATIONAL
·
2023
·Vol. 50
·期 5
·8390-8396
·
IF 5.2
Zhentong Lu,Shuting Liu,Zhiqiang Tang,Haoran Zhang,Wei Li,Jianle Zhuang,Chaofan Hu,Yingliang Liu,Bingfu Lei,Xuejie Zhang
In situ precipitation of CsPbBr 3 quantum dots (QDs) in glass is considered as one of the effective methods to overcome its instability and to achieve practical applications. However, it still faces the great challenges of low photoluminescence quantum yield (PLQY), poor thermostability and photostability at present. Herein, we successfully prepared CsPbBr 3 QDs in situ within a well-designed glass matrix (CsPbBr 3 QDs@glass), which exhibits symmetric narrowband emission at 523 nm with a full width at half maximum (FWHM) of 25 nm, giving a PLQY of up to 52.15 % under 455 nm excitation. Meanwhile, it can keep 45.25 % of the initial luminescence intensity at 373 K, better than that of most reported CsPbBr 3 QDs@glass materials. As a demonstration of a conceptual application, a white LED backlight strip was fabricated at home by encapsulating CsPbBr 3 QDs@glass composite and K 2 SiF 6 :Mn 4+ red phosphor on blue chips with silicone , achieving a wide color gamut of 128.6 % and 95.8 % of NTSC and Rec. 2020 color gamut, respectively. The assembled CsPbBr 3 QDs@glass-based LCD screen exhibits excellent color reproduction and color saturation. All these results demonstrate that this CsPbBr 3 QDs@glass composite material is a promising green emitter for wide color gamut LCD display.
研究领域:
材料科学
·
光电子学
·
显示技术
·
纳米材料
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Pan Xiong,Yiqin Gong,Xiaoling Yang,Yihua Zhu,Cheng Chen,Jianhua Shen
Despite the outstanding optical features of lead halide perovskite quantum dots (QDs), they are troubled by stability issues that hinder their prospects in practical applications. Herein, the CsPbBr 3 QDs generated here were grown in situ in hydrophobic silica aerogels (SiO 2 AGs). More importantly, the photoinitiated cross-linking reaction of the capping ligands, conjugated linoleic acids (CLA), forms hydrophobic polymer shells from CsPbBr 3 QDs@SiO 2 AGs-poly. And these polymer shells further improve the water stability of QDs. The composite retains 83 % photoluminescence (PL) intensity after being dispersed in water for five days. And SiO 2 AGs also act as confined templates owing to their unique porous structure to avoid aggregation and regrowth of QDs in the polymerization process of CLA. With the combined effects of SiO 2 AGs and polymer shells, the composite shows remarkable optical performance with a high absolute quantum yield (QY) (89.08 %). And this green-emitting composite was applied as a luminescent material in a white light-emitting diode (WLED), which exhibited excellent luminescence with the color coordinates of (0.3344, 0.3253) and light efficiency of 28.8 lm/W at 20 mA, and light stability under large current.
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Journal of Materials Chemistry A
·
2022
·Vol. 11
·期 1
·408-418
·
IF 14.511
Ruxin Guo,Junmin Xia,Hao Gu,Xuke Chu,Yan Zhao,Xianghuan Meng,Zhiheng Wu,Jiangning Li,Yanyan Duan,Zhenzhen Li,Zhaorui Wen,Shi Chen,Yongqing Cai,Chao Liang,Yonglong Shen,Guichuan Xing,Wei Zhang,Guosheng Shao
While caesium lead bromide (CsPbBr3) is promising for highly stable perovskite solar cells (PSCs), the usual solution-based methods require tedious multistep spin coating processes, which imposes a practical barrier against scaling up to large areas for industrial exploitation. Although sequential vapour deposition (SVD) can meet commercial requirements, these films are limited by high trap density and impure phases, resulting in poor performance of PSCs. Here, we obtained low-trap density and effectively phase-pure CsPbBr3 films (grain size > 3 μm, trap density < 4 × 1015 cm−3) by systematic defect and phase management. With the identification of a molecular ionic liquid from theoretical simulation, we find that such a designer molecule can form multiple bonding interactions with the perovskite phase. This results in significantly enhanced crystallization of the CsPbBr3 phase, and more importantly, effective passivation of well recognized Cs- and Br-vacancy defects. CsPbBr3 PSCs with simplified architecture using carbon as electrodes without hole transport layer (HTL) achieved highest power conversion efficiency (PCE) of up to 11.21% for small area devices (0.04 cm2) and 9.18% for large area devices (1 cm2). The unencapsulated devices exhibited excellent long-term stability, maintaining over 91% of the initial PCE after 100 days in ambient air at a humidity of ∼55%. This work also provides a valuable approach to process phase-pure, low-defect, and large-area inorganic CsPbBr3 perovskite films for efficient and stable optoelectronic devices.
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TALANTA
·
2022
·
IF 6.556
Hongbo Wang,Jing Wang,Qian Li,Jianxiu Du
A dual-emission fluorescent nanoprobe was successfully constructed through self-assembling CsPbBr 3 perovskite nanocrystals (CsPbBr 3 PNCs) and tetraphenylporphyrin tetrasulfonic acid (TPPS). Acetylcholinesterase (AChE) is observed to directly quench the green fluorescence of CsPbBr 3 PNCs at 520 nm in the absence of an enzyme substrate, but has no significant influence on the red emission of TPPS at 650 nm. The decreased value of the fluorescence intensities ratio at 520 to 650 nm (ΔF 520 /F 650 ) is proportional to the logarithmic value of AChE activity ranging from 0.05 to 1.0 U/L. The limit of detection is as low as 0.0042 U/L. The relative standard deviation is 3.6% in eleven consecutive measurements of 0.2 U/L AChE. The method exhibits a good anti-interference capacity since it does not respond to most concomitant species. Satisfactory results are acquired for the determination of AChE activity in human serum samples.
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高影响因子
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