ACS Photonics
·
2026
·
IF 6
Hang Xia,Luyao Lv,Xi Ran,Mohan Yuan,Xinzheng Lan
PbS colloidal quantum dots (CQDs) hold great promise in the next generation of low-cost, high-performance short-wave infrared (SWIR) photodetectors. Both the dark current and the spectral response, however, have been hampered by the preparation of semiconductor-grade PbS CQDs. Here, we report high-performance PbS CQD photodetectors by leveraging a monomer-assisted ligand exchange strategy. The resultant PbS CQD films show enhanced defect passivation evidenced by more than 1 order of magnitude increase in their exciton lifetime, which translated into photodetectors with record low dark current and high specific detectivity (D*). For a cutoff wavelength ∼1700 nm, ultralow dark current (21 nA/cm2 at −0.5 V) and a peak specific detectivity (D*) of 8.73 × 1012 Jones were achieved at 1650 nm, which are comparable to commercial InGaAs photodetectors. In addition, the implementation of this approach to large-sized PbS CQDs leads to broadband photodetectors with a cutoff wavelength of ∼2330 nm, a regime previously inaccessible to PbS CQDs. The monolithic integration of PbS CQD photodetectors with a 256 × 256 pixel thin-film transistor readout circuit enables infrared imaging through Si and Ge filters, validating the technology’s potential for broadband imaging applications.
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Yuchao Huang,Di Li,Jie Guo,Zeyu Miao,Shuo Li,Ziqi Song,Wenxu Yin,Xiaoyu Zhang
Tin halide perovskites offer a lead-free alternative for optoelectronics, yet their strong tendency toward self-trapped exciton (STE) formation has hindered the development of color-pure emission. Here, we report a strategy to control the emission behavior of two-dimensional PEA2SnI4 nanoplatelets through a synergistic approach combining Sn2+ vacancy suppression and surface oxidation control. By introducing excess stannous oleate during synthesis, we suppress Sn vacancies, shifting the emission from broadband yellow (STE-dominated) to narrowband red (band-edge excitonic emission). Further narrowing is achieved by replacing conventional ligands with antioxidant surface ligands, stabilizing Sn2+ and eliminating residual traps. This approach yields highly luminescent PEA2SnI4 nanoplatelet colloidal solution with sharp red emission and a record-high quantum yield of 17.2%. Structural and spectroscopic analyses reveal a clear correlation between lattice distortion and electron–phonon coupling. Our findings offer a rational design strategy for defect-tolerant, lead-free quantum emitters with tunable excitonic properties.
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ACS Nano
·
2025
·
IF 16
Yu Lou,Haoran Wang,Zhicong Zhou,Miao Zeng,Zhongliang Yan,Xueying Yang,Pengfei Fu,Arui Huang,Dong Li,Tom Wu,Yang Bai,Hui-Ming Cheng
Pure-red perovskite light-emitting diodes (PeLEDs) are critical for next-generation displays, while existing systems based on mixed Br/I compositions, quasi-2D phases, or colloidal 0D quantum dots are still facing challenges in fulfilling the requirements of the Recommendation BT.2020 (Rec. 2020) red standard. CsPbI3 nanoplatelets (NPLs) whose bandgap depends on thickness-size are a promising candidate for pure-red light-emitting emitters, but their practical use as LEDs has been hampered by the metastability of the emissive CsPbI3 cubic phase. Here, we report the synthesis of stabilized γ-CsPbI3 NPLs with a tailored surface coordination by incorporating a trace amount of dimethyl sulfoxide (DMSO) and N,N’-dimethylpropyleneurea (DMPU) into the precursor. These ligands selectively coordinate with undercoordinated Pb2+ sites in [PbI6]4– octahedra through Lewis acid–base interactions, redistributing the electron density at Pb centers and inducing lattice distortion by the Pb–I–Pb bond angle torsion, thereby stabilizing the γ-phase. The complementary effect of the polarities and the coordination capacities of DMSO/DMPU guide anisotropic growth along the [100] direction, enabling atomic-precision control of the NPL thickness (4 monolayers) to tailor the quantum-confined pure-red emission. The resultant pure-red PeLEDs achieve Commission Internationale de l’Eclairage (CIE) coordinates of (0.708, 0.292), 100% compliance with the Rec. 2020 specification, as well as an external quantum efficiency (EQE) of over 12% and a superior operational lifetime with a half-lifetime (T50) of 360 min, representing the highest reported values for CsPbI3 NPL-based PeLEDs.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Kairui Kuang,Xue Jiang,Chenhui Qian,Zhenming He,Liumei Su,Jialong Zhao,Bingsuo Zou,Zhentao Du
In the present work, the exploration of photoelectrochemical (PEC) photodetectors (PDs) based on Ag-doped ZnO/MoS2 nanorod arrays is reported. Ag-ion doping optimizes the band structure of ZnO, reduces interface defect states, promotes the formation of an internal electric field, and significantly improves the photoelectric performance and stability of ZnO/MoS2 heterojunction PEC PDs. The PD exhibits excellent photodetection behavior, with a high photocurrent density (684.08 μA·cm–2), responsivity (2.207 mA W–1), and detectivity (11.3 × 108 Jones) under white-light illumination with an intensity of 310 mW cm–2 and a bias voltage of 0.6 V, which are approximately 2.7, 2.7, and 4.2 times higher than those of pure ZnO/MoS2, respectively. Furthermore, Ag doping significantly improves the self-powered photoelectric performance of the device, demonstrating excellent photoresponse characteristics under zero bias. This study reveals the mechanism by which Ag-ion doping improves the performance of ZnO/MoS2 photodetectors, providing fundamental support for the development of high-performance photoelectrochemical photodetectors.
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ACS Applied Nano Materials
·
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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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Li Liao,Shuling Xiang,Biyou Bao,Guanglong Xu,Chengli Zhang,Qiang Wang,Zhenhu Cao,Wentao Chen,Hongtao Cao,Hongliang Zhang
Intelligent electrochromic systems that integrate energy storage with optical feedback are increasingly sought after to meet the demands of global energy transition and the burgeoning field of flexible electronics. Yet, the performance and reliability of flexible zinc-based electrochromic energy storage devices (EESDs) are often compromised by the limitations of conventional electrolytes, including poor interfacial stability, liquid leakage, and inadequate mechanical robustness. Herein, we report a high-performance flexible EESD based on a Prussian blue–zinc (PB–Zn) chemistry, enabled by a scalable blade-coated PB cathode and a quasi-solid-state electrolyte (QSSE) incorporating a semi-interpenetrating polymer network (semi-IPN) of poly(vinylidene fluoride- co -hexafluoropropylene) (PVDF-HFP) and ethoxylated trimethylolpropane triacrylate (EOTMPTA). The device delivers a high optical modulation of 74.49%, a coloration efficiency of 189.77 cm 2 C −1 , and outstanding cycling stability with 93.72% retention after 10,000 cycles, attributed to a stabilized electrode–electrolyte interface enabling highly reversible zinc electrochemistry. Moreover, the system demonstrates efficient self-powered operation when integrated with a solar cell (SC), highlighting its potential for energy-autonomous smart windows. Overall, this work establishes a material–interface co-design strategy that provides a promising pathway toward durable, high-performance, and self-sustaining electrochromic smart windows.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2026
·
IF 4.1
Hu Wenxu,Ge Dandan,Fu Feie,Yuan Lin,Yang Chunyan,Weng Zhehui,Huang Yao
In this study, a new liquid phase microextraction method was developed by combining micelle-mediated extraction of aristolochic acids (AAs) in traditional Chinese medicines with polyfluorinated alcohol solutions, and subsequent preconcentration via deep eutectic solvent (DES)–induced supramolecular solvent (SUPRAS) formation. The preparation of SUPRASs with polyfluorinated alcohols functioning as amphiphiles and the DESs acting as coacervation agents is demonstrated for the first time. Different polyfluorinated alcohols and DESs were examined for the extraction and preconcentration of AAs. The SUPRAS prepared from hexafluorobutanol (HFB) and a DES based on (1) octanol:(2) fenchyl alcohol achieved the highest extraction efficiency. Compared to traditionally used surfactants such as octanol, octanoic acid, and octylamine, HFB exhibited better extraction efficiency of AAs. The optimized method provided good linearity in the range of 0.14–500 µg g −1 for AA-I and 0.1–600 µg g −1 for AA-II with determination coefficients higher than 0.9961. The limits of detection were 0.03 – 0.04 µg g −1 , which were lower than those of the limits stipulated by the Chinese Pharmacopoeia (0.001%, w/w). The extraction recoveries ranged between 89.2 and 107.8%. The conventional methods for extracting analytes from solid samples typically involve an initial extraction phase utilizing hazardous organic solvents. The developed method can be applied to extract and preconcentrate a wide range of trace analytes from different solid samples by eliminating the need for harmful organic solvents. The developed method is efficient and reliable and can be applied to determine AAs in natural plants.
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JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2022
·Vol. 31
·期 4
·1628-1641
·
IF 4.705
Zhou Qichang,Zhang Siqi,Peng Yang,Fang Xiuqin,Zhao Xinyu,Yu Gaobo,Xie Yanli,Li Jiacheng,Feng Yuhong
Agrochemicals provide huge agronomic and economic benefits. However, excessive agrochemicals cause serious environmental pollution. The use of surfactants can effectively improve the utilization rate of agrochemicals in the soil, and an amphiphilic alginate derivative (Ugi-alg) was prepared in this work. This paper mainly discussed the affinity between Ugi-alg and soil colloids and the influence of Ugi-alg on the adsorption behavior of pesticides on colloidal particles. In the presence of 2.4 mM Ca2+, the affinity between soil colloids and Ugi-alg (30 mg/L) was enhanced (~ − 12.33 mV) compared with pure soil colloids (~ − 30 mV). The strong affinity between Ugi-alg and the colloids reduced the migration of acetamiprid. Transmission electron microscopy showed that soil colloids were wrapped by the network structure of Ugi-alg, indicating that Ugi-alg easily adhered to the surface of soil colloids. Studies of the adsorption showed the adsorption capacity of acetamiprid on soil colloids was 556 mg/g in the presence of Ugi-alg (30 mg/L) and Ca2+ (2.4 mM). And the adsorption behavior of acetamiprid in soil colloids was also not greatly affected by changes in pH and temperature. Ugi-alg is a degradable polysaccharide-based surfactant which provides a new concept and a practical method for the remediation of soil pollutants.Graphical abstract
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Advanced Materials Interfaces
·
2022
·Vol. 10
·期 6
·2202159
·
IF 6.389
Xiao Liu,Yu Jing,Chunyan Wang,Xin Wang,Ruoshui Li,Yuan Xu,Zhongliang Yan,Huayan Zhang,Jihuai Wu,Zhang Lan
Perovskite silicon tandem solar cells are one of the effective ways to further improve the photoelectric conversion efficiency (PCE) in the research and development of solar cells in the future. CsPbIBr 2 can be used as the top cell material in tandem solar cells due to its wider bandgap and better long-term stability. However, the serious defect density and carrier recombination limit its further improvement. In this work, Octylammonium Octyldithiocarbamate (ODTC) is added to the CsPbIBr 2 precursor. Through its strong metal ion complexing ability, it combines with the uncoordinated Pb 2+ in the CsPbIBr 2 , and then thermally decomposes to produce PbS during the annealing process. As an additive, ODTC modulates the crystallization of CsPbIBr 2 , increases the crystal size, reduces defect density, extends carrier lifetime, and improves charge transfer. Moreover, in situ-generated PbS can also optimize photovoltaic performance of CsPbIBr 2 perovskite solar cell (PSC). Consequently, the champion PCE of the devices can attain to 10.15% and still maintain an initial efficiency of 90% after 45 days. Therefore, the strategy is an effective way to prepare efficient and stable CsPbIBr 2 PSCs.
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NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 12
·5773-5779
·
IF 3.3
Jinxu Cao,Feng Shi,Long Chen,Xuemei Xu,Zhen Chen,Zhanjun Yang,Xingmao Jiang
Bio-activity conservation of biomolecules after immobilizing in nanomaterials has been a tough challenge, especially in biomedical applications. Herein, we developed a novel freezing-assisted reverse microemulsion method to encapsulate water-soluble enzymes in hollow mesoporous silica nanospheres (HMSNs) for maximumly maintaining enzyme bio-activity. Firstly, a low-temperature and ethanol-free synthesis was carried out, and glucose oxidase (GOx) as a model enzyme was encapsulated into HMSNs to obtain GOx@HMSNs. The TEM and SEM images showed a uniform sphere morphology of GOx@HMSNs with a large hollow cavity for GOx loading. The element mapping, FTIR spectrum and TGA curve further confirmed the effective physical encapsulation of GOx in HMSNs, which can maintain stable bio-activity as verified by the enzyme activity assay. In addition to the facile synthesis for avoiding enzyme-denaturation, the N2 adsorption–desorption curves further demonstrated that small mesopores on HMSNs for blocking enzyme leakage may be another important factor for conserving GOx activity. Finally, GOx@HMSNs as a biosensor significantly possessed a wider linear range of 0.06 mM to 2.61 mM with a low detection limit of 0.01 mM, indicating high sensitivity. Therefore, our synthesis method provides a promising approach for biomolecule immobilization with potent bio-activity and biosensor applications with superior sensitivity.
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INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Lan Ding,Yongping Ding,Fenghua Bai,Gonglai Chen,Shuwei Zhang,Xiaoxue Yang,Huiqin Li,Xiaojing Wang
Given the global warming caused by excess CO2 accumulation in the atmosphere, it is essential to reduce CO2 by capturing and converting it to chemical feedstock using solar energy. Herein, a novel Cs3Bi2Br9/bismuth-based metal–organic framework (Bi-MOF) composite was prepared via an in situ growth strategy of Cs3Bi2Br9 quantum dots (QDs) on the surface of Bi-MOF nanosheets through coshared bismuth atoms. The prepared Cs3Bi2Br9/Bi-MOF exhibits bifunctional merits for both the high capture and effective conversion of CO2, among which the optimized 3Cs3Bi2Br9/Bi-MOF sample shows a CO2–CO conversion yield as high as 572.24 μmol g–1 h–1 under the irradiation of a 300 W Xe lamp. In addition, the composite shows good stability after five recycles in humid air, and the CO2 photoreduction efficiency does not decrease significantly. The mechanistic investigation uncovers that the intimate atomic-level contact between Cs3Bi2Br9 and Bi-MOF via the coshared atoms not only improves the dispersion of Cs3Bi2Br9 QDs over Bi-MOF nanosheets but also accelerates interfacial charge transfer by forming a strong bonding linkage, which endows it with the best performance of CO2 photoreduction. Our new finding of bismuth-based metal–organic framework/lead-free halide perovskite by cosharing atoms opens a new avenue for a novel preparation strategy of the heterojunction with atomic-level contact and potential applications in capture and photocatalytic conversion of CO2.
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PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Qing Chen,Liyue Zhang,Jinli Zhang,Sania Habib,Guangming Lu,Jinyue Dai,Xiaoqing Liu
It is a subject of great practical significance and challenge to endow marine coatings with both excellent bacterial killing and antifouling properties. In this work, a series of bio-based organic coatings demonstrating high antibacterial rate, strong algae-killing ability and satisfied real-sea fouling resistance were reported. The main-chain type benzoxazine (MCBZ) resins were prepared from the renewable daidzein and furfurylamine, together with polyetheramine, long aliphatic chain primary amines, and paraformaldehyde. By adjusting the amines, the overall performance of synthesized MCBZs could be manipulated. Results indicated that the low surface energy of obtained MCBZ could prevent fouling adhesion, and the synergistic effect of long alkyl chains and daidzein led to the efficient anti-fouling. Notably, besides the low curing temperature of 200 °C, excellent processing property and good substrate adhesion (5.02 MPa), poly (12-fu-MCBZ) also possessed 94.5 % antibacterial rate, 100 % algae-killing ability and excellent real-sea antifouling performance. This work provides us a new strategy to solve the marine biological pollution using renewable raw materials.
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