CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yongmin Duan,Shugang Li,Keyi Gu,Zhaojing Kuang,Juan Du,Junjie Zhang
Scalable and passive surface passivation strategies are essential for improving the durability and performance of perovskite quantum dot (PQD) glass materials , making them suitable for real-world optoelectronic technologies. In this study, we report a spontaneous, water-assisted surface evolution process in CsPbBr 3 PQD glass, where ambient moisture induces the gradual formation of PbBr(OH) nano-phases on the glass surface over a period of four years. This self-grown passivation layer effectively enhances the material's photoluminescence performance, boosting the photoluminescence quantum yield from 20 % to 93 % without any external treatment. Detailed structural, optical, and spectroscopic analyses confirm that the PbBr(OH) phase mitigates surface defects and suppresses non-radiative recombination. Density functional theory calculations suggest that the wide bandgap of PbBr(OH) nano-phases helps confine charge carriers within the CsPbBr 3 PQDs, further enhancing luminescence efficiency. The resulting PQD glass demonstrates remarkable stability against air, thermal, and UV exposure, making it ideal for long-term applications in solid-state lighting and other optoelectronic systems. This work offers a cost-effective, passive, and potentially scalable method for improving the performance of perovskite-based materials, with significant implications for their integration into durable and high-performance devices.
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ACS Nano
·
2025
·
IF 16
Jianqiang Xiao,Kai Yin,Lingxiao Wang,Jiaqing Pei,Xinghao Song,Yin Huang,Jun He,Ji-An Duan
Perovskite quantum dots (QDs) have emerged as revolutionary materials for next-generation display technologies due to their tunable bandgaps, high color purity, and low-cost fabrication. However, challenges persist in outdoor display applications, including poor stability, inadequate weatherability designs, and multicolor integration difficulties. This study proposes a bioinspired “atomic–nano–micro” fabrication strategy based on femtosecond laser direct writing (FsLDW). By synergizing transient laser thermodynamic modulation with surface micro/nanostructural engineering, dual-functional architectures are simultaneously constructed on a polyvinylidene fluoride (PVDF) substrate. The upper layer utilizes laser ablation to generate hierarchical micro/nano structures, forming a lotus-leaf-inspired superhydrophobic surface (contact angle >161°, sliding angle <3°) that provides self-cleaning capability and water-erosion resistance. The lower layer leverages the low thermal conductivity of PVDF to regulate the localized thermal environment, driving directional crystallization of CsPbX3 (X = Cl/Br/I) QDs with in situ halogen composition control, thereby achieving single-step FsLDW-patterned full-spectrum emission (475–690 nm) and high-resolution patterning (∼20 μm). The resulting films retain over 90% of their initial luminescence intensity after simulated outdoor environmental testing and demonstrate exceptional rain-driven self-cleaning properties, effectively resisting pollutant coverage. This strategy offers an innovative solution for developing perovskite-based luminescent devices that integrate high stability, flexibility, full-color display, and weather resistance.
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ADVANCED MATERIALS
·
2026
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IF 29.1
Haipeng Su,Jingjing Wang,Chengjie Deng,Shuai Zou,Hao Luo,Jing Liu,Hao Li,Xing Zhou,Jianbing Zhang,Daoli Zhang,Jiang Tang,Liang Gao
Interfacial defects and poor mechanical robustness critically limit the performance of colloidal quantum dot (CQD) photodiodes for infrared imaging. Here, we introduce a bifunctional organosilane, (3-mercaptopropyl) methyldimethoxysilane (MDMS), as an interfacial layer to simultaneously address these challenges in inverted PbS CQD photodiodes. MDMS molecules form robust covalent bridging at the CQDs/electron transport layer (ETL) interface through thiol-based coordination and hydrolysis-condensation into a cross-linked siloxane network. This interface engineering not only reinforces mechanical adhesion (achieving 5B rating in ASTM D3359 tests vs. 0B/1B for C 60 controls) but also provides an ideal nucleation surface for ALD-grown SnO 2 ETL, suppressing island-like growth and interfacial defects. The optimized devices deliver a specific detectivity of 2.37×10 12 Jones at 1550 nm under 0 V while maintaining 79% EQE under −0.1 V, with dark current reduced by >50% compared to C 60 -based controls. Monolithic integration with a silicon ROIC yields a SWIR imager with outstanding photoresponse non-uniformity (2.8%) and spatial resolution (26 lp/mm at 50% MTF), demonstrating silicon wafer perspectivity and material discrimination. This work provides an efficient strategy for addressing interfacial issues in CQD optoelectronics.
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Advanced Electronic Materials
·
2026
·
IF 5.9
Zhaohuan Cai,Zhan Su,Fuyi Cao,Xiaobo Hu,Guoen Weng,Hidefumi Akiyama,Shaoqiang Chen
Strain-induced wavelength-tunable flexible lasers hold considerable promise in wearable devices and multifunctional electronic skin. Furthermore, their dynamic pulse parameter adjustability with picosecond-level temporal resolution provides extended potential in high-precision dynamic monitoring, high-speed anti-interference communication, and precision sensing. Here, we report a flexible CsPbBr 3 perovskite microlaser with spectral tunability of 1.59 nm in wavelength and 14 ps in laser pulsewidth through mechanical stress modulation. The device exhibits a low threshold density of <2 µJ/cm 2 , a high respond speed with a delay time of <70 ps, and an ultrashort optical pulse with a minimum duration of 10.8 ps. The strain-induced evolution of the gain-switched pulsed laser outputs, including pulsewidth, delay time, and photon decay were systematically explored, for the first time, by taking the strain–photon synergetic coupling mechanism into account. Additionally, the stress dependences of the laser pulse behaviors are physically revealed by theoretical simulations using the Hamiltonian matrix combined with rate equations. Our results provide not only a better understanding of lasing in flexible perovskite microcavity systems under stress, but also a new platform for high-precision stress monitoring by picosecond-level pulsewidth sensing.
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Advanced Optical Materials
·
2026
·
IF 7.2
Ou Hai,Keke Guan,Hang Li,Peng Li,Zhanying Bai,Jiaxin Qin,Yuanting Wu,Xin An,Weikang Dong
All-inorganic perovskite quantum dots (PQD) have become the most promising next-generation luminescent material due to their excellent luminescent properties. However, as an ionic crystal, their stability is the biggest problem for their large-scale application. Especially, it is a huge challenge to use them in water or at high temperatures. This study proposes a strategy for the simultaneous synthesis of CsPbBr 3 quantum dots and silica aerogels (SiO 2 AG). During the formation of the aerogel network, the quantum dot precursor solution is confined within nanoscale silica aerogel “microcapsules”; upon heating, the quantum dots undergo nucleation and growth within these “capsules”, simultaneously completing the synthesis and protection of the quantum dots. The experimental results show that the photoluminescence properties of CsPbBr 3 quantum dots and SiO 2 aerogel （CsPbBr 3 @SiO 2 AG) Composites material prepared by this method remain unchanged after heat treatment at 400°C for 8 h, and the photoluminescence quantum yield (PLQY) can reach 99.1%. Even after direct immersion in water and natural evaporation, the luminescent properties remain above 39%, and the precipitation of Pb 2+ is effectively inhibited. This material provides strong support for the large-scale application of perovskite quantum dots, especially in various emerging fields under extreme conditions.
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Advanced Optical Materials
·
2026
·
IF 7.2
Di Wen,Xiaotong Yu,Hao He,Yuan Gao,Kun Cao,Rong Chen
Achieving stable light emission under large, repeated, and multiaxial deformation remains challenging due to the intrinsic brittleness and environmental sensitivity of emissive materials. Here, we report a region-selective fabrication strategy that integrates block copolymer (BCP)-guided emissive-domain formation with selective atomic layer infiltration (ALI). This strategy enables the construction of stretchable rigid-soft luminescent films with mechanically compliant matrices and locally protected emissive domains. Block-copolymer self-assembly defines spatially isolated emissive domains, while ALI selectively forms nanoscopic oxide armors only within emitter-containing regions, reinforcing the domains without stiffening the surrounding soft matrix. Finite-element analysis and strain-dependent optical measurements indicate that applied strain is predominantly accommodated by the soft matrix, leaving the rigid emitter domains effectively unstrained. The resulting stretchable luminescent films maintain nearly unchanged optical performance under up to 100% multiaxial strain. The region-selective construction strategy provides a general design route for mechanically robust luminescent systems.
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ChemistrySelect
·
2026
·Vol. 11
·期 28
·e73876
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IF 2.3
Tao Liu,Huichao Zhang,Bo Huang,Shitong Li,Bin Liu
Mn 2+ -doped perovskite nanocrystals (NCs) have attracted extensive research interest and have been synthesized with sizes in the strong confinement regime. Nevertheless, the size of the doped NCs is still not as small as that of undoped perovskite NCs. To address this, we develop a ligand-assisted reprecipitation method incorporating ultrasonication to synthesize Mn 2+ -doped CsPb(Cl/Br) 3 NCs. The obtained spherical NCs have an average size of 3.1 nm and exhibit orange photoluminescence originating from the 4 T 1 to 6 A 1 transition of Mn 2+ . The luminescent properties correlate with the volume ratio of MnCl 2 to PbBr 2 precursors. Increasing the ratio enhances the Mn 2+ -related emission, while excessive doping leads to photoluminescence quenching. When the precursor ratio is reduced to 1:1, the NCs exhibit both intrinsic exciton and Mn 2+ -related emission, with some particles adopting cubic or rod-like morphologies. Prolonged ultrasonic treatment does not significantly shift the emission peak of the NCs, but promotes superlattice assembly in small-sized NCs, showing a center-to-center separation of 4.2 nm. Subsequently, altering the precursor addition sequence to introduce MnCl 2 last during ultrasonic preparation yields simultaneous formation of spherical and cubic NCs. Finally, post-synthesis doping of Mn 2+ is achieved. Formation of small spherical NCs confirms hypothesis that MnCl 2 induces morphological transformation of NCs. Graphical Ultrasonication-assisted ligand-assisted reprecipitation delivers 3.1 nm Mn 2+ -doped CsPb(Cl/Br) 3 nanocrystals with orange emission from the Mn 2+ 4 T 1 → 6 A 1 transition.
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ULTRASONICS SONOCHEMISTRY
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2026
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IF 10.2
Shengxin Zhu,Jianwei Liao,Longshi Rao,Yuying Wang,Xiang Huo,Qinghao Zhong,Haoyu Chen,Guisheng Zhong,Xiaodong Niu
Halide perovskite quantum dots (HPQDs) are transformative candidates for next-generation optoelectronic devices, owing to their exceptional optoelectronic properties including widely tunable bandgaps, ultrahigh color purity, and solution processability. However, scalable, deterministic synthesis of high-quality HPQDs with simultaneous ultra-narrow emission linewidth and high photoluminescence quantum yield (PLQY) remains a longstanding challenge, fundamentally limited by the mass transfer bottleneck and poor mixing efficiency of conventional laminar microreactors. Here, we report a biomimetic vein-inspired ultrasonic microreactor integrated with sharp-edged microstructure arrays to address this core challenge. Through systematic multiphysics simulations, we quantitatively decode the acoustic-hydrodynamic coupling mechanism in the microreactor, and establish a quantitative structure-performance relationship between microstructure geometry and sonochemical reaction performance. We identify an optimized cylindrical microstructure configuration that synergistically amplifies acoustic streaming and cavitation yield to break laminar boundary layer confinement. Experimental validation confirms the optimized microreactor enables continuous synthesis of high-quality HPQDs with an ultra-narrow full width at half maximum of 23.28 nm and PLQY up to 78.6%, markedly outperforming conventional microfluidic methods. We further elucidate that cavitation-enhanced micromixing enables dynamic supersaturation tuning, driving LaMer-type size-focusing and homogeneous nucleation for exceptional HPQDs monodispersity. This work provides a generalizable, scalable microfluidic strategy for precision synthesis of high-performance optoelectronic nanomaterials, bridging the critical gap between lab-scale research and industrial translation.
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MATERIALS RESEARCH BULLETIN
·
2026
·
IF 5.8
Jing Li,Heng Zheng,Xiang Mei,Junjie Yan,Haojun Luo,Yuanzheng Yang,Yanxue Wu,Shunxing Liang,Weitong Cai
The study utilizes a binary solvent system comprised of Water and Methanol (WMe) to dissolve CsBr. • A tailored WMe binary solvent enables synthesis of high-quality CsPbBr₃ films via two-step spin-coating. • The perovskite solar cells fabricated using this method achieve a peak power conversion efficiency (PCE) of 6.59%. • After 30 days of exposure to ambient air, the PCE of unencapsulated devices remained at 87% of its initial value. Carbon-based CsPbBr 3 perovskite solar cells attract significant interest for their long-term stability and facile fabrication in humid environments. However, fabricating high-quality CsPbBr 3 films via conventional spin-coating remains challenging due to the large solubility difference between PbBr 2 and CsBr. In this context, a binary solvent system comprising Water and Methanol is employed for CsBr dissolution, where in the CsBr solubility is tailored by modulating the water proportion to achieve a fitting stoichiometric balance with PbBr 2 . Eventually, a high-quality CsPbBr 3 film is synthesized through a two-step spin-coating procedure. The film is then integrated into an FTO/c-TiO 2 /m-TiO 2 /CsPbBr 3 /carbon solar cell, yielding a power conversion efficiency (PCE) of 6.59%. Remarkably, even after 30 days of unencapsulated exposure to ambient air, the PCE retains 87% of its initial value. Furthermore, the effects of precursor solubility and solvent composition on CsPbBr 3 crystallization process are explored, providing valuable insights for selecting novel solvents for high-performance CsPbBr 3 solar cells. Download: Download high-res image (129KB) Download: Download full-size image
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Yiyan Wang,Yanjie Zhang,Yunan Lin,Zheng Wei,Haohao Cao,Jingjie Yu,Zhiguo Xiao
Red-Green-Blue (RGB) phosphors are promising for optical information encoding and full-spectrum white light-emitting diodes (WLEDs). Herein, KCsPbBr 3 perovskite quantum dots (PQDs, ∼5.0 nm) were successfully formed on Sr 2 MgSi 2 O 7 : Eu 2+ phosphors via a facile deposition–precipitation method, yielding blue-green emitting composites. The KCsPbBr 3 -Sr 2 MgSi 2 O 7 : Eu 2+ composites exhibit tunable emissions at 463 nm and 519 nm under 365 nm excitation. Specifically, the blue emission at 463 nm is attributed to the 4f 6 5 d 1 → 4f 7 transition of Eu 2+ ions in the Sr 2 MgSi 2 O 7 host, while the green emission at 519 nm originates from the emission of KCsPbBr 3 perovskite quantum dots. Notably, the emission intensity at 75 wt% KCsPbBr 3 is ∼240 times higher than that at 9 wt% and a blue afterglow persists after removing UV excitation. Under external stimulation, the composites display color-variable patterns with fluorescence mode conversion, enabling multi-dimensional anti-counterfeiting. For instance, an RGB pattern appears white under natural light but transforms into a red-green pattern under UV and afterglow modes. Furthermore, full-spectrum WLEDs with high color rendering (Ra = 90, Rf = 83, Rg = 91), comparable to sunlight, are achieved by combining the composites with CaAlSiN 3 : Eu 2+ . These results indicate that KCsPbBr 3 -Sr 2 MgSi 2 O 7 : Eu 2+ PQD phosphors have strong potential in advanced anti-counterfeiting and full-spectrum WLED applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Zhanpeng Wang,Tonghua Hu,Peng Yang,Jian Huang,Luyang Hou,Yichi Zhong,Hongyu Yang,Jian Xiong,Jingzhou Li,Hongxing Dong,Long Zhang
The spatial distribution characteristic of the superlattices sizes on the assembly substrates was revealed. • A kinetic regulation strategy was proposed to achieve CsPbBr 3 superlattice size tunable. • The superlattices fabricated via our method host the capability of ultra-fast superfluorescence emission. Superfluorescence in self-assembled CsPbBr 3 superlattices of colloidal quantum dots (QDs) has garnered extensive attention due to its ultra-fast, intense burst emission. Among the available fabrication methods for superlattices, saturated solvent evaporation remains widely utilized for its operational simplicity and cost-effectiveness. However, this conventional method exhibits poor controllability and process randomness owing to the absence of a stable preparation platform, thereby hindering controlled self-assembly. Here, a high-temperature (30–70 °C) saturated solvent evaporation method was developed for size-tunable and efficient preparation of high-quality CsPbBr 3 superlattices. In this approach, the coffee-ring effect governs assembly by driving solute transport, inducing a distinct spatial gradient where superlattice size decreases from the substrate edge to center. Systematic modulation of assembly temperature and QD concentration enables adjustability of superlattice dimensions. Specifically, higher temperatures attenuate solute migration, thereby reducing superlattice size, while increased QD concentration strengthens inter-dot interactions to promote the formation of larger superlattices. A near-100-fold radiative acceleration of the prepared superlattices compared to conventional QD films demonstrates the ultrafast superfluorescence emission capability. Combined with their potential for scalable production, a material foundation was provided for ultrafast photonic applications. And it also opens up a reliable pathway for superlattice fabrication, laying a foundation for future size-dependent superlattice research and the development of high-performance optoelectronic devices. Download: Download high-res image (151KB) Download: Download full-size image
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ADVANCED MATERIALS
·
2026
·
IF 29.1
Zhengfen Wan,Xiao Huang,Fangyi Zhang,Qiming Zhang,Min Gu
Halide perovskites exhibit exceptional optoelectronic properties, yet their intrinsic chemical fragility and ionic nature pose fundamental challenges for high-resolution patterning and nanoscale integration. Here we report a reversible, all-optical structural modulation strategy that enables chemistry-free, sub-diffraction patterning of halide perovskite thin films through light-driven crystallization-decomposition dynamics. Localized femtosecond laser excitation induces controlled crystallization and an orthorhombic-to-cubic phase transition in CsPbBr 3 thin films, markedly enhancing crystallinity and optoelectronic response. In contrast, ultraviolet illumination promotes defect formation and partial decomposition into CsBr and PbBr 2 , reversibly suppressing crystallinity and photocurrent. This optically driven crystallization-decomposition cycle is repeatable over multiple iterations with more than 85% photocurrent recovery, establishing a robust platform for reversible material-state control. Leveraging the nonlinear competition between laser-induced crystallization and UV-induced inhibition, we further demonstrate resist-free, sub-diffraction nanolithography with feature sizes down to 93.5 nm, well beyond the conventional optical diffraction limit. This work reveals a light-programmable structural degree of freedom in halide perovskites and provides a general materials framework for reconfigurable perovskite architectures, adaptive photonics, and dynamic optoelectronic systems.
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