ACS Applied Nano Materials
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2026
·
IF 5.8
Huan Tian,Feng-Lei Jiang
Perovskite nanocrystals (NCs) exhibit intrinsic chemical instability due to their ionic nature. This property renders them susceptible to structural degradation and optical performance deterioration upon exposure to various cations (both inorganic and organic ions). For instance, Cs+ can induce phase transformation and photoluminescence quenching in the CsPbBr3 NCs. In this work, we found that externally introduced metal cations exert diverse effects (classified as three types) on the structure and optical properties of CsPbBr3 NCs. Notably, certain cations, such as Zn2+ and Cd2+, can bind to the surface and shield nanocrystals against the detrimental effects of exogenous cations. The protection effects were observed by both optical spectroscopy and transmission electron microscopy. Pretreatment with both ZnBr2 and CdBr2 significantly enhances the resistance of CsPbBr3 NCs to structurally or optically detrimental exogenous cations (Cs+). Moreover, with didodecyldimethylammonium bromide (DDAB) simultaneously incorporated in this pretreatment, the pretreated CsPbBr3 NCs exhibit enhanced resistance to polar solvents (e.g., ethanol), manifesting as keeping stable and bright even when exposed to 20% (volume percentage) of ethanol. These three components (ZnBr2, CdBr2, and DDAB) exhibit complementary functions for chemical stability. This stability-preserving strategy is expected to enhance the robustness of perovskite NCs against complex chemical conditions encountered during the device fabrication process (solution processing and interlayer interface engineering) and operating environments.
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高影响因子
Photonics
·
2026
·Vol. 13
·期 2
·108
·
IF 1.9
Chenyang Fan,Chengzhao Luo,Yanhui Ding,Siwen Xia,Junlong Wu,Yunpeng Xiao,Yu Chen
Perovskite quantum dots (PQDs) based on CsPbX3(X = Cl, Br, I) have attracted extensive attention due to their outstanding optoelectronic properties; however, their practical applications are hindered by poor environmental stability. In this work, a sequential surface-modification strategy is developed to address these limitations. First, CsPbBr3PQDs are passivated with (3-aminopropyl) triethoxysilane (APTES), which reduces surface defects and enhances the photoluminescence quantum yield (PLQY) from 38.5% to 74.4%. Subsequently, a dense silica shell is constructed via in situ hydrolysis of tetramethyl orthosilicate (TMOS), further improving the PLQY to 95.6% and significantly boosting environmental stability. Structural and optical characterizations confirm effective defect passivation and suppress non-radiative recombination, with carrier lifetimes extended from 2.5 ns to 36.9 ns. Remarkably, the silica-coated PQDs retain over 50% of their initial emission intensity after 100 min of water immersion, far exceeding the stability of uncoated counterparts. Furthermore, when integrated with a commercial K2SiF6: Mn4+red phosphor and a blue light-emitting diode (LED) chip, the resulting white LED (WLED) exhibits a wide color gamut covering 104% of the National Television System Committee (NTSC) standard and Commission Internationale de l’Éclairage (CIE) coordinates of (0.323, 0.331), closely matching standard white light. Importantly, only the silica-coated PQDs maintain a stable electrically driven device emission spectrum after water exposure.
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OPTICAL MATERIALS
·
2026
·
IF 4.3
Guiyuan Liu,Wannan Dai,Ziyue Wang,Xiaotian Lu,Ying Ma
Metal halide perovskite (MHP) nanocrystals (NCs) exhibit outstanding optoelectronic properties, making them promising candidates for light-emitting diodes (LEDs). However, their practical application is severely hindered by poor environmental stability. Specifically, violet-emitting CsPbCl 3 NCs suffer from low luminescence properties because of deep-level trap-mediated non-radiative recombination. Here, we report a core-shell structure in which a CsPbCl 3 NC is epitaxially coated with a Cs 2 NaInCl 6 double perovskite shell via a hot-injection method. The resulting CsPbCl 3 @Cs 2 NaInCl 6 heterostructures feature type-I band alignment, enabling effective surface defect passivation and strong charge carrier confinement within the CsPbCl 3 core. As a result, the photoluminescence quantum yield (PLQY) of CsPbCl 3 NCs increases dramatically from 4.4% to 49.5%, accompanied by a prolonged photoluminescence lifetime and a narrower emission spectral full width at half maximum (FWHM). Beyond luminescence enhancement, the Cs 2 NaInCl 6 shell imparts remarkable resistance against damage from water, UV irradiation, and heat. Furthermore, the same encapsulation strategy significantly improves the stability of Mn and Ni-doped CsPbCl 3 (CsPbCl 3 :Mn and CsPbCl 3 :Ni) NCs. This work provides an effective strategy to simultaneously enhance luminescence performance and environmental stability of CsPbCl 3 NCs through passivation with a double perovskite shell.
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Polymer Chemistry
·
2026
·
IF 3.9
Mengchao Zhang,Sifan Li,Zhaohui Zhang,Hongkun Li
The direct conversion of carbon dioxide (CO2) into value-added polymeric materials has garnered considerable research interest in recent decades. Multicomponent tandem polymerization (MCTP), as an emerging synthetic strategy, demonstrates exceptional efficiency in constructing functional polymers. Nevertheless, CO2-involved MCTP systems have been rarely reported. Herein, we developed a one-pot MCTP involving CO2, alkynes, alkyl bromide, and thiol, enabling the efficient transformation of CO2 into structurally well-defined regioregular polymers. The polymerization process mediated by Ag2WO4 and Cs2CO3 under ambient pressure in N,N-dimethylacetamide upon heating produced four soluble poly(β-thioacrylate)s with high weight-average molecular weights (up to 11 500 g mol−1) and Z-stereoregularities (up to 84%). Notably, the tetraphenylethene-containing polymer exhibited aggregation-induced emission features, demonstrating its potential as a dopant in liquid crystalline polymer networks. The resulting film displayed circularly polarized luminescence properties with an exceptional luminescence dissymmetry factor of −0.88. Intriguingly, the polymer/polyamide 6 (PA6) composites manifested room-temperature phosphorescence featuring long emission lifetimes up to 510 ms. Furthermore, the polymers could be post-modified by the thiol–ene click reaction to produce sulfur-rich polymers. This work provides a robust platform for converting CO2 into stereoregular polymeric materials with tailorable photophysical properties, offering promising applications in advanced optoelectronic materials and sustainable technologies.
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ChemPhotoChem
·
2026
·Vol. 10
·期 3
·e202500362
·
IF 3
Xianye Wang,Hao Ge,Chao He,Guanying Cao
All-inorganic perovskite quantum dots (QDs) (CsPbX 3 , X = Cl, Br, I) have shown great promise in optoelectronic applications but are severely hindered by their poor environmental stability and photoluminescence (PL) quenching. In this work, we report a novel approach for enhancing both stability and optical performance by insitu growth of CsPbBr 3 QDs within a borosilicate glass matrix, assisted by SrF 2 and Sm 2 O 3 codoping. The introduction of F − ions from SrF 2 modifies the glass network structure, promoting uniform nucleation and growth of QDs. Simultaneously, Sm 3+ doping, through partial incorporation into the CsPbBr 3 QD lattice, passivates surface defects and induces lattice contraction, which enhances quantum confinement effects. At the optimal Sm 3+ concentration of 1 mol%, the PL intensity increases by 332.8%, the photoluminescence quantum yield rises from 22.01% to 37.5%, and the fluorescence lifetime extends from 95.05 to 127.69 ns. The glass encapsulation provides long-term air and water stability, outperforming conventional ligand-capped QDs. Moreover, the developed materials were successfully applied in high-brightness green and white light-emitting diodes, achieving wide color gamut coverage (up to 129.4% NTSC), and demonstrated strong potential in forensic fingerprint visualization. These results provide a new pathway for developing stable, multifunctional perovskite-based optoelectronic materials. Graphical This study demonstrates a dual strategy of F − /Sm³ + codoping and glass encapsulation to significantly enhance the luminescence performance and stability of CsPbBr 3 quantum dots. Optimal Sm³ + doping (1 mol%) yields a 332.8% increase in photoluminescence intensity, improves quantum efficiency from 22% to 37.5%, and extends fluorescence lifetime to 127.69 ns. The glass matrix provides exceptional environmental stability, retaining 78.65% initial luminescence after 50 days in air. Resulting light-emitting diode devices achieve a wide color gamut covering 129.4% of the NTSC standard.
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Nature Communications
·
2026
·
IF 18.1
Hu Xudong,Wang Zhicheng,Thomas Simil,Nadinov Issatay,Cai Qiuting,Dai Xingliang,Huang Zhigao,Wang Yue,Gong Jialong,Wu Ye,Zhou Renqian,Wen Yuanfan,Wang Jian-Xin,Zeng Haibo,Bakr Osman M.,Alshareef Husam N.,Li Xiaoming,Mohammed Omar F.
The increasing demand for high-speed X-ray imaging requires scintillators with high light yield and fast response. Perovskite nanocrystals are promising candidates due to their distinctive optical properties and solution processability. However, the fabrication of thick X-ray films, which are several orders of magnitude thicker than conventional optoelectronic devices, leads to severe material waste and reduced light yield caused by strong spectral overlap and self-absorption. In addition, conventional synthesis methods often suffer from low reaction yields and uncontrolled exciton pathways. Here, we develop a low-temperature polar-solvent synthesis method that achieves a reaction yield of 162 mg mL −1 and optimizes exciton routing for improved energy transfer. This approach increases the Stokes shift and reduces the radioluminescence decay to 7.19 ns. Consequently, high-speed X-ray imaging at 7,680 frames per second with a spatial resolution of 27.6 line-pairs per millimeter is achieved, supporting sustainable commercialization of perovskite nanocrystal scintillators for dynamic X-ray imaging.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Jingyi He,Shimin Liu,Shiqing Xu
All-inorganic lead halide perovskite (CsPbX 3 , X = Cl, Br, or I) quantum dots (QDs) glasses have attracted considerable attention due to their excellent stability. However, realizing pure-blue emission CsPbX 3 (X = Br, Cl) QDs glasses with high photoluminescence quantum yield (PLQY) remains a challenge. This study employs RbCl as a dual-functional dopant to regulate the photoluminescence (PL) wavelength and promote the crystallization of CsPbBr 2 Cl 1 QDs embedded in a glass matrix. During thermal treatment, Cl − ions separated from the glass network enhance CsPbBr 2 Cl 1 QD crystallization by increasing the internal Cl/Br ratio and passivating Cl vacancy defects. Simultaneously, high-field-strength Rb + ions partially enter Cs + sites, further promoting crystallization and suppressing Cl vacancies. The synergistic effect of Cl − and Rb + ions induces PL wavelength from 495 nm to 473 nm, while the PLQY increases from 17% to 25%. Among the RbCl-doped samples, the LED based on 4.5 mol% RbCl exhibits the widest color gamut, covering 79.7% of the Rec. 2020 standard. This study introduces a bifunctional dopant strategy to fabricate high-performance, pure-blue-emitting CsPbBr x Cl 3-x QDs glasses. The developed material shows great potential for advanced applications in LED lighting, backlight displays, information storage, and optical anti-counterfeiting.
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Nanoscale
·
2026
·
IF 5.2
Le Luo,Xiaoming Mo,Yusheng Song,Zhentao Du,Sheng Cao,Jinju Zheng,Bingsuo Zou,Jialong Zhao
Quantum-confined CsPbBr3 nanoplatelets (NPLs) are appealing candidates for ultraviolet (UV)/blue photodetectors due to their strong excitonic binding energy and large absorption coefficient. However, the inherent soft lattice and surface defects of CsPbBr3 NPLs lead to poor operational stability, limiting their practical applications. Here, we report an A-site alloying strategy that enhances the structural rigidity and defect formation energy of CsPbBr3 NPLs. The strategy synergistically employs short-chain tetrolic acid (TLA) ligands to passivate uncoordinated Pb2+ ions and formamidinium (FA+) cations to compensate for Cs+ vacancies. This dual repair strategy enhanced both the conductivity and UV irradiation stability of CsPbBr3-based NPLs. As a result, the self-powered UV photodetectors based on Cs0.73FA0.27PbBr3-TLA NPLs exhibited a responsivity of 89 mA W-1, a specific detectivity of 3.99 × 1012 Jones, and an on/off ratio approaching 106 at 0 V bias. Even after 30 days of ambient storage, the device maintained excellent photoresponse and a high specific detectivity of 1.73 × 1012 Jones. Clear images obtained with a custom-built 2D imaging system corroborate the fast response and excellent stability of the device. These results underscore the efficacy of the combined lattice and surface engineering approach for realizing high-performance, durable perovskite NPL-based UV photodetectors.
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PubMed
高影响因子
Chemistry-Switzerland
·
2026
·Vol. 8
·期 3
·30
·
IF 2.6
Keyujia Zhong,Fang Lei,Shiqing Dang,Hongyang Zhang,Ying Shi,Haohong Chen
Perovskite quantum dots (PQDs) face significant performance limitations due to surface defects, which are not sufficiently addressed by conventional single-passivation methods. We introduce a dual-passivation strategy that synergistically combines bifunctional ligand 3-(N,N-dimethyloctadecylammonium)-propanesulfonate (SB3-18) treatment with silica coating to simultaneously passivate undercoordinated Pb2+ions and bromine vacancies in red-emitting CsPb(Br/I)3PQDs. This approach nearly triples the photoluminescence quantum yield (PLQY, from 23% to 58%). Systematic structural, morphlogical, binding energy, Fermi level and optical analyses confirm effective defect suppression and enhanced exciton luminescence. The dual-passivated sample QDs:SB3-18@SiO2also exhibit excellent environmental stability, retaining 85% of their initial emission after 30 min in air and exhibiting improved UV resistance. By combining the PQDs with a CGSO:Tb3+mechanoluminescent phosphor, a composite film is fabricated with bimodal optical response—color-selective photoluminescence under UV excitation and stress-activated green emission upon scratching. This work presents a robust route to high-performance PQDs and demonstrates their potential for advanced anticounterfeiting and smart optical applications.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Duna Su,Jingsheng Ma,Chuanli Wu,Xiaobo Hu,Wan Jiang,Lianjun Wang,Xiuxun Han
Lead-free Cs 3 Cu 2 I 5 perovskite nanocrystals (NCs) are promising candidates for optoelectronic applications owing to their non-toxicity and intrinsic blue emission. However, their practical application is hindered by defect-dominated low photoluminescence quantum yield (PLQY) and poor environmental stability. Herein, we propose an ultrafast liquid‑nitrogen (LN) quenching strategy integrated with one‑pot synthesis, which delivers an ultra‑high cooling rate of 35 K/s faster than conventional ice‑water (IW) cooling (1 K/s). This abrupt thermal termination effectively suppresses Ostwald ripening, ion migration and surface ligand detachment, thereby promoting uniform size distribution, inducing lattice contraction and reducing the non-radiative defects. The obtained Cs 3 Cu 2 I 5 NCs exhibit a remarkable PLQY up to 85% and exceptional stability, maintaining beyond 80% of initial PL intensity after ambient storage for 35 days, aqueous exposure for 36 h and continuous UV irradiation for 48 h. Moreover, the LN-quenched NCs were successfully integrated into X-ray scintillator film achieving a spatial resolution of 10 lp/mm, and their colloidal ink enabled stimulus-responsive information encryption and fluorescence anti-counterfeiting patterns, attributed to enhanced self-trapped exciton (STE) emission and robust structural integrity. This work establishes ultrafast LN quenching as a universal and feasible strategy for fabricating highly luminescent and stable perovskite NCs, paving the way for multifunctional optoelectronic applications.
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Applied Materials Today
·
2026
·
IF 7
Zijun Yan,Yue Sun,Yurong Dai,Shuhui Wang,Guolong Chen,Yue Lin,Huanhua Wang,Hao-Chung Kuo,Zhong Chen,Tingzhu Wu
Atomic layer deposition (ALD) presents a promising avenue for improving the environmental stability of perovskite quantum dots (PQDs). However, standard ALD processes (120–200 °C) inevitably compromise the PQD lattice structure, while lower temperatures yield porous, non-protective films. To overcome this trade-off, we developed a sequential-temperature ALD strategy that synergizes low-temperature surface passivation with high-temperature densification. First, a low-temperature (65 °C) ALD stage deposits a surface modification layer around PQDs, which leverages energetic precursor molecules to selectively passivate surface/lattice defects, effectively suppressing non-radiative recombination within PQDs and boosting their luminescence efficiency. Crucially, this initial layer plays a pivotal role in preventing thermal degradation of the perovskite during subsequent processing and generates a hydroxyl‑rich surface. These reactive sites facilitate the second stage, a high-temperature (120 °C) ALD, to rapidly deposit a dense Al 2 O 3 protective barrier layer. Remarkably, this sequential process induces the formation of a chemically graded Pb–O–Al–O–Al 2 O 3 interfacial structure remediating defects within the initial layer, exhibiting intrinsic self-healing capability. The resulting CsPbBr 3 /Al 2 O 3 composite manifests exceptional environmental stability, particularly against moisture, representing one of the best performances reported to date for ALD-encapsulated bulk CsPbBr 3 films. Unlike complex hybrid encapsulation schemes, our streamlined, standalone ALD approach enables scalable PQD modification. White light-emitting diodes fabricated with these encapsulated PQDs demonstrate a wide color gamut (∼120% NTSC) and remarkable spectral stability. This work establishes a generalizable paradigm for ALD encapsulation of thermally sensitive materials.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Yanze Liu,Youping Wu,Biao Zhao,Jianping Deng
Circularly polarized long afterglow (CPLA) materials have achieved substantial progress especially in anticounterfeiting area. However, achieving multicolor CPLA emissions based on an all-inorganic cesium lead halide perovskite (PSK) remains challenging. Herein, we realized multicolor CPLA emission based on PSK-based materials for the first time. The materials integrate chiral helical polyacetylene (PSA) and PSK/SMS)@SiO2, where the latter is the hydrolyzed product of PSK and inorganic phosphor Sr2MgSi2O7: Eu2+, Dy3+ (SMS) encapsulated by SiO2. After PSK surface modification, we combined PSK and SMS into composite particles via siloxane hydrolysis instead of simple blending. This further creates a more favorable spatial environment for energy transfer between them, promoting multicolor long afterglow (LA) emission. Subsequently, we achieved both blue CPLA emission from SMS via PSA’s selective absorption and multicolor CPLA emission through circularly polarized phosphorescence energy transfer (CPP-ET, including resonance energy transfer and radiative energy transfer) between SMS and PSK. The asymmetry factor can be up to 2.7 × 10–2. The strategy eliminates both the complex chiral transfer process and the intricate synthesis of multicolor CPLA-emitting PSK. Also noticeably, multidimension information encryption and chiral logic gate are developed based on the multicolor tunable CPLA-active materials. This work provides a new strategy for constructing LA PSK materials and offers additional insights into the preparation of PSK materials with CPLA properties.
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