APPLIED CLAY SCIENCE
·
2021
·
IF 5.467
Yi Zhao,Ziyao He,Feiyang Ren,Wei Xia,Xiaojuan Liang,Lanlan Zhai,Weidong Xiang
All-inorganic cesium lead halide perovskite quantum dots (QDs) have attracted widespread attention due to unique photoelectric properties . However, blue-emitting (CsPbCl x Br 3−x , 0 < x ≤ 3) QDs have poor stability and low photoluminescence quantum yields (PLQY), which limits its application in perovskite based light-emitting diodes (LEDs). The chlorine-free CsPbBr 3 QDs have fewer crystal defects and a more stable crystal structure. Here, we prepared CsPbBr 3 QDs with adjustable photoluminescence (PL) (489–519 nm) by controlling the reaction temperature and composited it with natural mineral halloysite (Hal) nanotubes . The as-prepared CsPbBr 3 @Hal (100 °C) have high PL intensity, bright blue emission and enhanced stability. Under an open ambient condition, the CsPbBr 3 @Hal (100 °C) can still maintain 92.4% of original PL intensity after 60 days of storage. In addition, after 280 h of continuous irradiation with 365 nm UV lamp, its PL intensity still maintained 71%. Finally, a white LED (WLED) fabricated by incorporating the CsPbBr 3 @Hal (100 °C) and commercial red CaAlSiN 3 : Eu 2+ phosphor on the 395 nm InGaN blue-violet chip showed the CIE chromaticity coordinates of (0.3358, 0.3331). This work provides a new way for the synthesis and application of blue-emitting CsPbBr 3 perovskite materials in WLEDs and display devices.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2026
·
IF 5.9
Haochen Zhou,Ting Chen,Qifei Xia,Renjie Zhou,Zhixiang Xie
A dual-shell hierarchical protection strategy combining non-hydrolytic sol-gel derived SnO x coating and mesoporous ZSM-5 encapsulation was proposed to simultaneously boost luminescence efficiency and environmental stability of CsPbBr 3 nanocrystals. • Conformal amorphous SnO x layer uniformly passivates surface defects of CsPbBr 3 , the optimized CsPbBr 3 @SnO x sample achieves a PLQY increase from 64% to 74%, and retains 55% and 47% initial PL intensity after 120 min immersion in water and ethanol, respectively. • Secondary encapsulation within hierarchical micro-mesoporous ZSM-5 further reinforces structural robustness, raising the maximum PLQY of CsPbBr 3 @SnO x @ZSM-5 composite up to 76%. The composite exhibits negligible emission shift after 120 min treatment in water, ethanol and tetrahydrofuran, with outstanding retention of luminescence signal. • White light-emitting diode (WLED) assembled with CsPbBr 3 @SnO x @ZSM-5 green phosphor and commercial red K 2 SiF 6 :Mn 4+ phosphor delivers balanced white emission with CIE coordinates of (0.310, 0.307), a color rendering index of 70, correlated color temperature of 6651 K and luminous efficiency of 26.76 lm W −1 , demonstrating great potential for solid-state lighting applications. All-inorganic CsPbBr 3 perovskite nanocrystals (NCs) exhibit excellent optoelectronic properties but suffer from severe instability against moisture, oxygen, heat, and polar solvents due to their ionic lattice, surface defects, and labile ligands, leading to rapid ion migration and photoluminescence quenching. In this work, a dual-shell engineering strategy based on a non-hydrolytic sol-gel (NHSG) route was developed to construct CsPbBr 3 @SnO x and CsPbBr 3 @SnO x @ZSM-5 composite nanostructures. An SnO x -rich interfacial layer was formed on the CsPbBr 3 NCs and subsequently coupled with hierarchical ZSM-5 confinement, contributing to surface-defect passivation and stabilization of the interfacial chemical environment while preserving the perovskite crystal structure and emissive centers. At an optimized Sn/Pb molar ratio of 0.5, the photoluminescence quantum yield (PLQY) increased from 64% to 74%, and an optimal reaction time of 10 min yielded the highest emission efficiency (PLQY≈70%). Moreover, the SnO x coating significantly enhanced environmental stability, with CsPbBr 3 @SnO x retaining 55% and 47% of its initial PL intensity after 120 min exposure to water and ethanol, respectively. Subsequently, hierarchical encapsulation within mesoporous ZSM-5 further reinforced structural robustness and optical stability. The resulting CsPbBr 3 @SnO x @ZSM-5 composite achieved an enhanced PLQY of 76% and exhibited negligible emission shift after immersion in water, ethanol, and tetrahydrofuran for 120 min. In addition, the composite demonstrated excellent stability under continuous UV irradiation, thermal treatment, and ambient storage conditions. Finally, a white light-emitting diode (WLED) device fabricated using CsPbBr 3 @SnO x @ZSM-5 delivered stable white emission with Commission Internationale de l'Éclairage (CIE) coordinates of (0.310, 0.307), a color rendering index (CRI) of 70, a correlated color temperature (CCT) of 6651 K, and a luminous efficiency of 26.76 lm W −1 . These results highlight the effectiveness of the dual encapsulation strategy in simultaneously enhancing the photoluminescence performance and environmental stability of perovskite nanocrystals, providing a viable route toward high-performance optoelectronic and solid-state lighting applications. Download: Download high-res image (303KB) Download: Download full-size image
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Ziyang Niu,Zijun Huang,Peng Wang,Xiuquan Gu,Yulong Zhao
All-inorganic perovskite CsPbBr 3 nanocrystals (NCs) are promising for wide-color-gamut displays due to their high photoluminescence quantum yield (PLQY) and narrow emission bandwidth, yet their ionic nature renders them susceptible to degradation by moisture, heat, and mechanical stress, while surface defects induce non-radiative recombination. Herein, we propose a synergistic protection strategy combining ZnO inorganic modification with EPDM flexible polymer encapsulation. A ZnO heterojunction is constructed in situ on CsPbBr 3 NCs via a solution method, after which the modified NCs are dispersed in an EPDM matrix to fabricate flexible composite films. Structural and optical characterizations confirm that ZnO modification effectively suppresses non-radiative recombination, prolonging the average photoluminescence (PL) lifetime to 14.54 ns. XPS and DFT calculations reveal strong interfacial chemical interactions between CsPbBr 3 and ZnO, with an adsorption energy of −1.923 eV, suggesting effective surface-defect passivation. Stability tests demonstrate that after 6 days of water immersion, heating at 90 °C for 60 min, 200% mechanical stretching, and 100 h of UV irradiation, the composite retains 65%, 60%, and 80% of its initial PL intensity, respectively, showing substantially improved multidimensional stability. A white light-emitting diode fabricated using the film exhibits CIE chromaticity coordinates of (0.34, 0.32) and color gamut coverages of 121.2% NTSC and 98.2% Rec. 2020. This strategy simultaneously addresses defect passivation and environmental instability in perovskites, offering a feasible route towards commercial perovskite-based optoelectronic devices.
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ACS Applied Energy Materials
·
2026
·
IF 5.5
Jiayi Guan,Jian Ni,Xin Liu,Rufeng Wang,Minghao Hu,Juan Li,Hongkun Cai,Jianjun Zhang
Inorganic perovskite quantum dots (PQDs) have become a research hotspot in recent years owing to their outstanding optoelectronic properties. Compared to CsPbI3, CsPbBr3 is valued for its higher thermal and phase stability and larger device open-circuit voltage. Herein, we report a synthetic strategy for heterostructural CsPbBr3-PbS QDs. Then, we successfully verify the formation of the heterostructures using transmission electron microscopy (TEM) and X-ray diffraction (XRD) measurements, in which the corresponding interplanar distance and a noticeable angular shift are observed due to the growth of PbS on CsPbBr3 QDs. As a result, the CsPbBr3 QDs are connected by the PbS QDs, and the Pb suspension bonds on the outer surface of the CsPbBr3 QDs are also passivated. This contributes to the high stability of the heterostructural CsPbBr3-PbS QD dispersion and solar cells. Moreover, taking advantage of the surface passivation and bridging, the heterostructural CsPbBr3-PbS QD solar cells show a significant improvement in the efficiency of the devices. This work might eventually provide a reference method for the construction of all-inorganic quantum dot heterostructures and open up an avenue for improving the stability of all-inorganic CsPbX3 nanocrystals for use in photovoltaic and displays.
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ACS Applied Nano Materials
·
2026
·Vol. 9
·期 32
·15224-15232
·
IF 5.8
Liang Yuxian,Zhang Xuanshuo,Wang Qingya,Zeng Yicheng,Wu Rong,Sun Xiaoya,Tang Jiakang,Yue Yansong,Mahmud Sakil,Wei Jing,Zhukov Alexey,Liu Fangze,Li Hongbo
The development of high-light-yield scintillators based
on perovskite
quantum dots (PQDs) is hindered by their intrinsic instability and
aggregation, which severely limits their long-term operational reliability
and integration into polymeric matrices. Silica coating has been demonstrated
as an effective strategy to enhance the stability of PQDs. However,
achieving fast and uniform silica encapsulation on individual nanocrystals
remains challenging. Here, we report an efficient ammonia-catalyzed
strategy enabling the formation of a dense and uniform silica shell,
leading to discrete CsPbBr 3 @SiO 2 core–shell
structures with significantly enhanced robustness. The conformal silica
coating preserves optical quality, maintaining 87% photoluminescence
quantum yield in solution and 75% in film while minimizing aggregation
and spectral drift. When incorporated into poly(methyl methacrylate)
(PMMA), the resulting CsPbBr 3 @SiO 2 @PMMA scintillators
deliver a high light yield of ∼26,000 photons MeV –1 , a spatial resolution of 16 lp mm –1 , and >90%
PL retention after 120 days of ambient storage. These combined improvements
position silica-encapsulated PQDs as promising emitters for next-generation
X-ray scintillation devices.
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Journal of Materials Chemistry C
·
2026
·
IF 5.1
Zongxiao Li,Xiaoping Ouyang,Zhifang Chai,Duck Young Chung,Fangbao Wang,Yihui He,Tao Bo,Wenwen Lin,Mercouri G Kanatzidis
Ultrafast scintillators are essential for next-generation radiation detection, positron emission tomography, and high-speed medical imaging. All-inorganic CsPbBr3 perovskites are attractive candidates because of their high stopping power, and excellent optical quality, yet their long carrier lifetimes result in slow scintillation responses on the order of hundreds of nanoseconds. Here we demonstrate that controlled over-doping with Br2 produces CsPbBr3.03 single crystals with subnanosecond scintillation at room temperature while preserving crystal quality. Single crystals grown by the Bridgman method exhibit high transparency and maintain the orthorhombic perovskite structure. Br2 over-doping induces a slight lattice expansion (about 0.42% increase in unit-cell volume) while maintaining the orthorhombic perovskite phase and high optical transparency. Optical absorption reveals a slight redshift of the absorption edge after Br2 introduction, indicating a modified defect landscape. Time-resolved photoluminescence and radioluminescence measurements show that Br2 doping creates dense and efficient recombination centers that reduce the scintillation decay time from more than 100 ns in undoped crystals to 350 ps under 5.486 MeV α-particle excitation, and the scintillation decay time decreases by two orders of magnitude. The doped crystals also achieve a spatial resolution of 12 lp/mm in X-ray imaging. These results reveal a defect-engineering route for achieving ultrafast scintillation in halide perovskites and highlight the potential of Br2-modified CsPbBr3 for fast timing applications.
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Small
·
2026
·
IF 11.8
Jiahui Chen,Xianglong Wei,Siyin Hu,Jianing He,Zhenjie Huang,Shan-Ci Chen,Mei-Jin Lin,Huanghao Yang
Hybrid perovskite materials have recently emerged as a promising candidate in radiation detection research due to their superior charge carrier mobility and lower trap-state density. While most perovskite X-ray detectors typically rely on external bias for charge collection, the growing demand for efficient and energy-saving perovskite X-ray detectors has spurred extensive interest in self-powered devices, which offer high-performance, low power consumption, and enhanced portability. To date, most high-performance self-powered X-ray detectors rely on secondary crystal growth via post-deposition immersion in saturated solutions. Herein, we report a facile additive engineering strategy employing 4-trifluoromethyphenylammonium iodide (CF 3 PhAI) to modulate perovskite crystallization, enabling single-step fabrication of microcrystalline CsPbBr 3 films with grain sizes up to 38.6 µm. This approach effectively passivates defects and suppresses ion migration in CsPbBr 3 , reducing dark current drift by nearly two orders of magnitude from 4.135 × 10 −12 to 4.167 × 10 −14 A s −1 . Moreover, the incorporation of a low-work-function aluminum (Al) top electrode significantly enhances the built-in electric field, yielding a remarkable zero-bias sensitivity of 1.3 × 10 3 µC Gy air −1 cm −2 . This work accelerates the development of high-performance self-powered perovskite X-ray detectors toward practical applications.
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NANO
·
2025
·
IF 1.1
Zhenyu Yang,Jiandong Yang,Yan Chen,Wenhui Zhang,Feng Lin,Wenshu Yang,Wuyou Fu
Compared to organic–inorganic hybrid perovskite solar cells (PSCs), all inorganic CsPbBr 3 perovskite solar cells have higher stability but lower efficiency. Owing to the low solid solubility of CsBr in methyl alcohol, an incomplete first-step reaction with PbBr 2 reaction takes place at room temperature. As a result, a large amount of CsPb 2 Br 5 is generated in the final CsPbBr 3 film, which deteriorates the performance of CsPbBr 3 PSCs. Along these lines, in this work, CsCl was added to increase the reaction between CsBr and PbBr 2 in the first step and high-quality CsPbBr 3 films were prepared without CsPb 2 Br 5 . Our analysis demonstrated that at the optimal CsCl concentration of 6% in CsBr solution, the CsPbBr 3 perovskite solar cells exhibited a power conversion efficiency of 7.33%. The best device retained 98.57% of the power conversion efficiency (PCE) after storing it for 30 days under ambient air condition.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yi Zhu,Siyu Qin,Haohan Hu,Shu Nie,Xiangyi Bai,Yulong Zhao,Xiuquan Gu
Perovskite nanocrystals (NCs) are promising color converters for displays but are limited by defect-related inefficiency and instability. To address this, a one-pot synthesis is developed in which ZnO NCs and oleic acid first form stable zinc oleate complexes that anchor onto the surface of CsPbBr 3 NCs, thereby creating a stable organic-inorganic ligand shell, which suppresses degradation and Ostwald ripening during processing. Theoretical calculations confirm that the introduction of ZnO enhances the stability of NCs by raising the formation energy and suppressing defect generation. Consequently, photoluminescence quantum yield (PLQY) is boosted to 97%, representing a dramatic increase from the 32.4% value of pristine CsPbBr 3 NCs. Employing these high-performance NCs, a white light-emitting diode (WLED) was fabricated by integrating the composite film with a blue LED chip. More importantly, the NC-based composite films demonstrate robust stability under thermal, aqueous, and optical stresses, retaining > 70% of their initial PL intensity—significantly outperforming control samples (<30%). This WLED exhibits a wide color gamut, covering 129.8% of the NTSC standard and 96.9% of Rec. 2020. Subsequently, a WLED array backlight unit was fabricated and subsequently integrated into a prototype display. This work establishes the practical potential of ZnO-incorporated CsPbBr 3 NCs as efficient and stable color-conversion materials, thereby paving the way for advancing high-performance backlit display technology.
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Journal of Physical Chemistry C
·
2026
·
IF 3.4
Lu Tian,Zhen Zhang,Jing Li,Hao Wu,Baili Li,Dongli Yin,Yuan Ren,Zhipeng Li
Conventional methods for phase structure tuning and sizing of CsPbBr3 quantum dots (QDs) usually involve multistep procedures and are susceptible to impurity contamination. In this study, we propose a simplified thermal injection strategy that can simultaneously control the crystal size (8.9 to 17.5 nm) and phase transition as well as maintain high crystallinity by precisely adjusting the Cs+ concentration. Notably, a systematic increase in Cs+ content induces a reversible monoclinic-cubic-monoclinic phase transition with tunable quantum confinement effects. Comprehensive characterization results show that the luminescence wavelength could be tuned from 510 to 524 nm (blue-green color illumination), while the cubic-phase CsPbBr3 QDs possess the highest luminescence peak intensities, with photoluminescence quantum yields as high as 74.84% and extended exciton lifetimes (43.12 ns) due to the reduction of surface defects. The optimized cubic phase features a narrow size distribution (σ = 9.9%), high color purity (CCT = 10,575 K), and enhanced emission intensity, which are directly related to its symmetric crystal structure. The carrier dynamics during photoexcitation were also studied by using femtosecond transient absorption spectroscopy. The luminescent dot array was also well prepared through a dispensing process. The above results show that our simple method is helpful in the large-scale production of high-quality perovskite quantum dots for applications in display.
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IEEE TRANSACTIONS ON ELECTRON DEVICES
·
2026
·
IF 3.6
Bao Xiao,Yuquan Wang,Haoming Qin,Wenjie Chen,Xuchang He,Jun Du,Nannan Shen,Qihao Sun,Yihui He
Perovskite CsPbBr3 has emerged as a promising room-temperature semiconductor radiation detector, synthesizable via both melt- and solution-growth methods. Herein, we systematically compare the $\gamma $ -ray detection performance of CsPbBr3 crystals grown by inverse temperature crystallization (ITC) and vertical Bridgman (VB) method. ITC-grown crystals exhibit relatively low optical transmittance of ~65%, a short photoluminescence (PL) lifetime of ~6.07 ns, moderate resistivity of $6.06\times 10^{{9}}~\Omega {\cdot }\text {cm}$ , and a limited on–off ratio of ~350. In contrast, VB-grown crystals show markedly improved optoelectronic properties, including higher transmittance (75%~80%), a much longer PL lifetime (~36.75 ns), higher resistivity ( $1.08\times 10^{{10}}~\Omega {\cdot }\text {cm}$ ), and a significantly enhanced on–off ratio (~5300). These improvements indicate higher crystal quality and reduced defect density in VB-grown CsPbBr3 crystals, leading to more efficient charge transport. Notably, the average hole mobility and mobility-lifetime product increase from 5.36 cm ${}^{{2}}{\cdot }\text {V}^{-{1}}{\cdot }\text {s}^{-{1}}$ and $4.45\times 10^{-{4}}~\text {cm}^{{2}}{\cdot }\text {V}^{-{1}}$ to 24.87 cm ${}^{{2}}{\cdot }\text {V}^{-{1}}{\cdot }\text {s}^{-{1}}$ and $3.58\times 10^{-{3}}~\text {cm}^{2}{\cdot }\text {V}^{-{1}}$ , respectively. Accordingly, asymmetric Au/CsPbBr3/EGaIn detectors fabricated from VB-grown crystals deliver excellent average energy resolutions (ERs) of ~9.8% and ~5.5% for 241Am and 57Co $\gamma $ -ray sources, respectively, along with superior detector uniformity, whereas ITC-based detectors exhibit only moderate ERs of ~29.6% and ~22.6%. These results suggest that melt-grown CsPbBr3 crystals are more favorable for high-performance $\gamma $ -ray detectors applications.
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SOLAR ENERGY
·
2026
·
IF 7.9
Qixin Chen,Zhongchen Bai,Xu Wang,Xinghua Li,Min Feng,Zhengping Zhang
An ultrathin Mg-doped SnO 2 layer reconstructs the ETL surface. • SnO 2 /Mg-doped SnO 2 bilayer regulates the ETL/CsPbBr 3 interface. • Improved morphology and charge transport enhance device performance. • The optimized device achieves 8.74% PCE and 90.69% retention after 50 days. Incomplete surface coverage, localized exposure of ITO protrusions, and interfacial nonuniformity in solution-processed SnO 2 electron transport layers (ETLs) restrict the performance of hole-transport-layer-free (HTL-free) CsPbBr 3 perovskite solar cells (PSCs). Herein, a planar homojunction SnO 2 /Mg-doped SnO 2 bilayer ETL was fabricated by depositing an ultrathin Mg-doped SnO 2 layer on the SnO 2 surface to regulate the ETL/perovskite interface in an ITO/SnO 2 /CsPbBr 3 /carbon device architecture. This bilayer configuration improves surface coverage, interfacial contact, and energy-level alignment while preserving lattice compatibility within the SnO 2 -based system. The Mg-doped SnO 2 top layer reduces surface cracks and pits, limits local ITO exposure, decreases roughness, and improves precursor wettability. These changes promote the formation of CsPbBr 3 films with larger grains, fewer pinholes, better vertical morphology, higher crystallinity, and a near-stoichiometric composition. The PL, TRPL, EIS, dark J–V, XPS, and UPS results collectively indicate improved interfacial charge extraction, reduced defect-assisted non-radiative recombination, and more improved energy-level alignment at the ETL/perovskite interface. Consequently, the optimized HTL-free device achieved a champion PCE of 8.74% with a Voc of 1.520 V and retained 90.69% of its initial efficiency after 50 days of unencapsulated storage in air. This work indicates that introducing an ultrathin Mg-doped SnO 2 overlayer effectively reconstructs the ETL surface and regulates the ETL/perovskite interface, providing an effective interfacial regulation strategy for developing efficient and stable HTL-free all-inorganic PSCs.
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