Advanced Optical Materials
·
2025
·Vol. 13
·期 17
·2500216
·
IF 7.2
Xin Wang,Le-Yang Dang,Xu Zhang,Jia-Qi Zhu,Gui-Gen Wang
Doping can effectively adjust the energy band structure of a semiconductor, thereby influencing its electrical and optical properties. In this study, density functional theory is employed to calculate the crystal structure, electronic configurations, energy bands, and optical properties of tellurium-doped Bi 2 O 2 Se (Bi 2 O 2 Se 1-x Te x ), demonstrating that Te substitution lowers the conduction band, reducing the bandgap. Then 2D Bi 2 O 2 Se 1-x Te x nanosheets are synthesized via organic ion template-guided solution growth method, with Te doping controlled by the Te/Se molar ratio. Optical spectroscopy confirmed that tellurium doping significantly modulates the electronic properties of Bi 2 O 2 Se. When the doping molar concentration is 30%, its bandgap decreases to 0.57 eV. Therefore, Bi 2 O 2 Se 1-x Te x nanosheet-based photodetector demonstrates obvious enhancement of the photoelectric response in the near-infrared region. Notably, Bi 2 O 2 Se 0.7 Te 0.3 photodetector demonstrates broadband photosensitivity across 650–1550 nm, with high responsivity of 32.87 A W −1 and enhanced detectivity of 8.89 × 10 9 Jones at 1060 nm. The device also features a short response time of 16.8/11 µs at 1550 nm. Moreover, the photo-response of the detector shows reliable working stability. Finally, the photodetector is utilized for single-pixel imaging, showcasing its high-contrast infrared light detection capability. These results indicate that Bi 2 O 2 Se 1-x Te x is a promising material for high-sensitivity infrared light detection applications.
研究领域:
材料科学
·
凝聚态物理
·
光学工程
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Jianzong Li,Mingfang Wu,Hanxiao Zhang,Siqi Li,Can Wang,Peiyao Wang,Jiulong Sha,Xuelian Zhou
Photoelectrochemical (PEC)-type photodetectors are gaining significant interest as neoteric self-powered devices, owing to their high spectral responsivity and quick photoresponse. However, the underlying leakage issue makes the aqueous electrolyte contained inside PEC-type photodetectors unsuitable for manufacturing flexible optoelectronics. In this study, we report a flexible, self-powered PEC-type photodetector based on a cellulose-based hydrogel. Using a cellulose-based hydrogel electrolyte as the electron-transferring medium and two-dimensional Bi2O2Se nanosheet-coated indium tin oxide glass as the working electrode, the photodetector exhibits excellent self-powered capability. The hydrogel-based PEC photodetector exhibits a broadband photoresponse in the range of 365–850 nm. Moreover, under the condition of an illumination wavelength of 365 nm at a bias voltage of 0.6 V, the photodetector exhibits a responsivity of 0.68 mA/W, a detectivity of 2.44 × 108 Jones, and a fast response time of 85/103 ms, which are comparable to those of photodetectors based on traditional aqueous electrolytes. Additionally, the hydrogel-based PEC photodetectors show good flexibility and stability, maintaining more than 70.3% of their photocurrent density even after 100 cycles of bending at 120°, and no obvious photocurrent decay is observed after storage for 1 week. Based on these results, cellulose-based hydrogel electrolytes have significant potential for future applications in self-powered photodetectors.
研究领域:
材料科学
·
光电子学
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产品关联
DOI
高影响因子
Materials Today Chemistry
·
2023
·
IF 7.3
S. Gong,W. Lu,W. Zhang,Y. Zhang,T. Gan,H. Hu,Z. Huang
Poor visible light (VSL) absorption capacity and severe photogenerated carrier recombination rate are the two major problems limiting the application of g-C 3 N 4 (CN). In this work, a novel 2D/1D Bi 2 O 2 Se/tubular g-C 3 N 4 (TCN) Schottky junction photocatalyst was prepared by combining 2D Bi 2 O 2 Se with TCN at room temperature. The degradation rate of tetracycline hydrochloride (TCH) catalyzed by 5% Bi 2 O 2 Se/TCN composite was 85.3% within 30 min under VSL illumination, and the degradation kinetic constant reached 0.0570 min −1 , which was 9.6, 3.3, and 21.9 times higher than those of CN (0.0059 min −1 ), TCN (0.0173 min −1 ), and Bi 2 O 2 Se (0.0026 min −1 ), respectively. When 2D Bi 2 O 2 Se was combined with TCN as a cocatalyst, the Schottky junction was formed at the interface, which could efficiently transfer the photogenerated electrons in TCN to Bi 2 O 2 Se for enhancing photocarriers separation. In addition, Bi 2 O 2 Se enhanced the VSL light absorption performance of TCN. The main active species produced by Bi 2 O 2 Se/TCN under VSL illumination were h + and •O 2 − . Based on the results of LC-MS, a new degradation path of TCH catalyzed by Bi 2 O 2 Se/TCN was proposed. Therefore, this work proposed a novel Bi 2 O 2 Se/TCN Schottky junction photocatalyst for highly efficient removal of TCH.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 37
·期 4
·2409887
·
IF 27.4
Zhefeng Lou,Yingjie Zhao,Zhihao Gong,Ziye Zhu,Mengqi Wu,Tao Wang,Jialu Wang,Haoyu Qi,Huakun Zuo,Zhuokai Xu,Jichuang Shen,Zhiwei Wang,Lan Li,Shuigang Xu,Wei Kong,Wenbin Li,Xiaorui Zheng,Hua Wang,Xiao Lin
2D materials with remarkable second-harmonic generation (SHG) hold promise for future on-chip nonlinear optics. Relevant materials with both giant SHG response and environmental stability are long-sought targets. Here, the enormous SHG from the phase engineering of a high-performance semiconductor, Bi 2 O 2 Se (BOS), under uniaxial strain, is demonstrated. SHG signals captured in strained 20 nm-BOS films exceed those of NbOI 2 and NbOCl 2 of similar thickness by a factor of 10, and are four orders of magnitude higher than monolayer-MoS 2 , resulting in a significant second-order nonlinear susceptibility on the order of 1 nm V −1 . Intriguingly, the strain enables continuous adjustment of the ferroelectric phase transition across room temperature. An exceptionally large tunability of SHG, approximately six orders of magnitude, is achieved through strain modulation. This colossal SHG, originating from the geometric phase of Bloch wave functions and coupled with sensitive strain tunability in this air-stable 2D semiconductor, opens new possibilities for designing chip-scale, switchable nonlinear optical devices.
研究领域:
材料科学
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非线性光学
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凝聚态物理
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纳米光子学
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半导体器件
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 22
·12732-12739
·
IF 4.22
Li Yuping,Huo Haojie,Huang Hai,Guo Kai,Yang Xinxin,Xing Juanjuan,Luo Jun,Rao Guang-Hui,Zhao Jing-Tai
Layered oxygen-containing compound Bi 2 O 2 Se is a promising n-type thermoelectric material, favored by its considerably high Seebeck coefficient and low thermal conductivity. Significant preferred orientation along plane (110), identified in the hot-pressed sample, results in obvious anisotropy in the electrical and thermal transport properties. Nb substitution Bi in the insulating layer [Bi 2 O 2 ] 2+ can effectively increase the electron concentration (from 10 16 to 10 18 cm −3 ) by two orders of magnitude, while maintaining high mobility. Therefore, a larger power factor of 2.19 μW cm −1 K −2 has been obtained for Bi 1.94 Nb 0.06 O 2 Se at 823 K, which enlarges by three times in comparison with pristine Bi 2 O 2 Se (0.673 μW cm −1 K −2 ). Combined with the inherently low thermal conductivity, the ZT values of Bi 1.94 Nb 0.06 O 2 Se reach 0.195 at 823 K, corresponding to 325% enhancement. This study shows that the substitution of Nb for Bi is a promising way to optimize the thermoelectric properties of Bi 2 O 2 Se-based thermoelectric materials.
研究领域:
材料科学
·
热电学
·
固体物理学
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DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 9
·2102091
·
IF 6.389
Chaocheng Fang,Jianfu Han,Ming Yu,Wenliang Liu,Shengmei Gao,Kai Huang
2D bismuth oxyselenide (Bi 2 O 2 Se) nanosheets have received increasing attention in the field of electronics and optoelectronics due to their high-mobility, moderate energy bandgap, and air-stability. However, due to the intrinsic high mobility, the photodetectors based on 2D Bi 2 O 2 Se have an inevitable high dark current, leading to high power consumption and limiting its potential application in photodetection. Herein, a novel highly sensitive WS 2 /Bi 2 O 2 Se van der Walls (vdWs) heterostructure with straddling band configuration is assembled on fluorophlogopite substrate. Owing to the effective separation of photogenerated electron–hole pairs and the quantum tunneling effect, the responsivity and external quantum efficiency of the WS 2 /Bi 2 O 2 Se heterostructure are 628 mA W −1 and 147.6% under 532 nm illumination, respectively. The I photo / I dark ratio with more than two orders of magnitude can be obtained, and the rise time is ≈33 ms, while the fall time is 38 ms. Furthermore, the heterostructure achieves a broadband photodetection capability from visible to near infrared (532–1450 nm). The results suggest that the WS 2 /Bi 2 O 2 Se vdWs heterostructure possesses a promising potential application prospect in high performance and broadband photodetectors.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2020
·Vol. 126
·期 7
·1-9
·
IF 1.81
Chen Gexiang,Wu Jie,Wang Bo,Li Jun,Qi Xiang
2D layered material Bi 2 O 2 Se nanosheets, due to its high carrier mobility, near-ideal subthreshold swing, and high air-stability, which have shown great potential for applications in high-performance field-effect transistors and photodetector. Here, we have been successfully synthesized Bi 2 O 2 Se nanosheets via a facile one-step hydrothermal method. The Bi 2 O 2 Se nanosheets were characterized by scanning electron microscopy (SEM), Raman spectra and X-ray diffraction (XRD) patterns, which confirm an excellent crystallized of Bi 2 O 2 Se nanosheets. The as-prepared Bi 2 O 2 Se nanosheets were used to fabricate electrodes for a self-powered photodetector and exhibit preferable photoresponse activity. At 0 V, the photoeletrochemical (PEC) tests demonstrate that the responsivity and the response time of Bi 2 O 2 Se nanosheets can reach up to 20 μA W −1 and 0.12 s. Furthermore, the time stability and cycle stability also were measured. After a long time of testing, the photocurrent of Bi 2 O 2 Se nanosheets remained around 300 nA, and after processing 100 and 200 cycles, the photocurrent exhibits slight distinction. These findings indicate that Bi 2 O 2 Se nanosheets have great prospects for future applications in self-powered photodetector devices.
研究领域:
材料科学
·
纳米技术
·
光子学
·
半导体器件
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiayu Gu,Chen Wei,Jinhao Xu,Xiu Zhang,Chunjie Zhu,Da Teng,Leyi Liu,Meizhi Lan,Wenjing An,Yingying Xu,Pengxiang Qiu,Shuxian Hu
This study demonstrates a strategic paradigm in photocatalytic nitrogen fixation by engineering semiconductor hole oxidation dynamics to circumvent ammonium degradation. Diverging from conventional approaches focused on light absorption and carrier mobility enhancement, we develop a sacrificial agent-free system leveraging attenuated hole oxidation capacity to fundamentally suppress oxidative depletion of NH 4 + . Bi 2 O 2 Se (BOS) serves as an archetypal catalyst, revealing mechanistic correlations between weak hole oxidizing environments and nitrogen reduction efficiency. Experimental analyses confirm BOS's superior performance over traditional photocatalysts, attributed to its intrinsic capacity to prevent NH 4 + oxidation while enabling effective product enrichment. Remarkably, the catalyst maintains equivalent nitrogen fixation efficiency in ambient air and inert atmospheres, demonstrating exceptional oxygen compatibility. Furthermore, BOS exhibits panchromatic photon utilization extending into near-infrared regions (AQE = 0.12 % at 700 nm). The unmodified bulk-phase characteristics of BOS highlight its inherent catalytic superiority, challenging conventional modification-dependent catalyst design frameworks. This work establishes oxidation potential modulation as a critical determinant in photocatalytic nitrogen fixation while providing a material platform and conceptual blueprint for sustainable ammonia synthesis technologies.
研究领域:
催化化学
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材料科学
·
光化学
·
能源化学
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环境科学
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半导体物理
·
可持续技术
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Deng Ding,Xin Liu,Jiwen Chen,Ruina Xuan,Weifeng Peng,Liye Zhu,Xiaofang Li,Ya Sun,Chunlei Wang,Bo Chai,Juntao Yan,Zhuo Jiang
The photocatalytic activity of promising layered structure BiOX (X = Cl, Br, I) is limited by the low carrier mobility and charge transfer based on heterojunction . Hereon, we reported that Bi 2 O 2 Se with the same layered structure, high carrier mobility and broad spectrum absorption was used to composited with BiOCl to obtain effective layer to layer interfacial charge transfer and high photocatalytic activity under visible light . Bi 2 O 2 Se/BiOCl were synthesized via ion exchange method in precursor of Bi 2 O 2 Se. 25-Bi 2 O 2 Se/BiOCl shows the optimal photocatalytic removal activity of methyl blue (MB) and Cr (VI), which was higher than that of pure BiOCl and Bi 2 O 2 Se. The analysis of morphology revealed the in-growth mechanism of Bi 2 O 2 Se/BiOCl. A strong interaction between the same layer structure Bi 2 O 2 Se and BiOCl was proved by detailed analysis of XPS and valence charge density. Transient photocurrent responses and energy-level indicated the sensitized electrons of Bi 2 O 2 Se can be injected into BiOCl effectively and produce H 2 O 2 . We believe layer structure Bi 2 O 2 Se can be candidate co-catalyst to expand photocatalytic activity of layer structure semiconductor catalysts in the visible and infrared regions , especially, for the same layered bismuth compounds .
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Yingjie Zhao,Jiaming Hu,Zhefeng Lou,Lanxin Xu,Wenbin Li,Xiao Lin,Xiaorui Zheng
Analogous to the pivotal SiO 2 /Si junction in modern electronics, the β-Bi 2 SeO 5 /Bi 2 O 2 Se architecture has been demonstrated to enhance the performance of electronic devices. However, its potential to improve the optoelectronic properties of Bi 2 O 2 Se, such as responsivity and detectivity, remains unexplored. The photodetection performance of Bi 2 O 2 Se is primarily limited by intrinsic selenium vacancies at its surface, which lead to low photocurrent and instability. To address this, a defect-engineered β-Bi 2 SeO 5 /Bi 2 O 2 Se heterojunction is constructed with an atomically sharp interface via a developed UV-assisted oxidation strategy. This heterostructure successfully suppresses surface vacancies while enabling dual functionality—surface passivation and photoactive charge separation, resulting in substantially enhanced optoelectronic performance. First-principles calculations confirm a stable type-II band alignment with interfacial transitions enabling efficient carrier dissociation. The visible-near-infrared transparency and high- k of β-Bi 2 SeO 5 further enable top-gated phototransistors with dynamically tunable photoresponse, achieving the largely improved metrics of responsivity (1.2 × 10 4 A W −1 ), detectivity (1.5 × 10 13 Jones), and on/off ratio (2.3 × 10 6 ). Additionally, by using thermal scanning probe lithography, a high-resolution (pixel pitch = 6.5 µm) β-Bi 2 SeO 5 /Bi 2 O 2 Se phototransistor array is fabricated and its imaging capabilities are demonstrated. The results establish an effective defect-engineered strategy with in situ large-area growth capability of β-Bi 2 SeO 5 and high-resolution device patterning, making β-Bi 2 SeO 5 /Bi 2 O 2 Se a promising photoresponsive platform for advanced optoelectronic devices.
研究领域:
光电子学
·
材料科学
·
纳米技术
·
半导体物理
·
器件工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2021
·
IF 15.881
Jianghong Wu,Maoliang Wei,Jianglong Mu,Hui Ma,Chuyu Zhong,Yuting Ye,Chunlei Sun,Bo Tang,Lichun Wang,Junying Li,Xiaomin Xu,Bilu Liu,Lan Li,Hongtao Lin
Due to the excellent electrical and optical properties and their integration capability without lattice matching requirements, low-dimensional materials have received increasing attention in silicon photonic circuits. Bi2O2Se with high carrier mobility, narrow bandgap, and good air stability is very promising for high-performance near-infrared photodetectors. Here, the chemical vapor deposition method is applied to grow Bi2O2Se onto mica, and our developed polycarbonate/polydimethylsiloxane-assisted transfer method enables the clean and intact transfer of Bi2O2Se on top of a silicon waveguide. We demonstrated the Bi2O2Se/Si waveguide integrated photodetector with a small dark current of 72.9 nA, high responsivity of 3.5 A·W–1, fast rise/decay times of 22/78 ns, and low noise-equivalent power of 15.1 pW·Hz–0.5 at an applied voltage of 2 V in the O-band for transverse electric modes. Additionally, a microring resonator is designed for enhancing light–matter interaction, resulting in a wavelength-sensitive photodetector with reduced dark current (15.3 nA at 2 V) and more than a 3-fold enhancement in responsivity at the resonance wavelength, which is suitable for spectrally resolved applications. These results promote the integration of Bi2O2Se with a silicon photonic platform and are expected to accelerate the future use of integrated photodetectors in spectroscopy, sensing, and communication applications.
研究领域:
光子学
·
材料科学
·
光电技术
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiahu Yao,Yang Yang,Hu Zhao,Chuanming Wang,Liang Jin,Tengyun Long,Wei Huang,Xiang Zhan,Xin Li,Xin Chen,Jinhu Xie,Bin Wu,Chuansi Wang,Liling Huang,Hongnian Pan,Xuan Nie,Changjun Yu,Wei Chen
The accumulation of reactive oxygen species (ROS) within colonic tissue represents a critical factor in the pathogenesis of inflammatory bowel disease (IBD). The application of antioxidant therapy utilizing artificial nanozymes has emerged as an effective strategy for the management of IBD. Nevertheless, current nanozymes exhibit limitations in stability, tissue compatibility, and systemic toxicity, which constrain their applicability within the biomedical domain. Herein, we designed a biocompatible colon-targeted integrated therapeutic system (BiOSe-RA@FP), the core of which is Bi 2 O 2 Se (BiOSe) nanosheets encapsulating natural plant rosmarinic acid (RA), enclosed within pH-responsive enteric hydrogel microspheres (FP). This system ensures targeted delivery of BiOSe-RA to the inflamed colon and prolongs its local retention time. BiOSe-RA fully exerts the activities of superoxide dismutase (SOD) and catalase (CAT) in the colon, effectively removing ROS (·OH, ·O 2 − , and H 2 O 2 ). Concurrently, BiOSe-RA exerts excellent anti-inflammatory activities in the colon, which could inhibit the secretion of inflammatory factors, and induce macrophages to polarize the M2 type. The ultimate effect is to preserve the integrity of the intestinal epithelial mucosal barrier and restore microbial homeostasis in the colon by mitigating intestinal oxidative stress and ameliorating the inflammatory microenvironment. The constructed BiOSe-RA@FP could regulate intestinal microbial community disorders, providing a safe and effective new solution for the treatment of IBD.
研究领域:
纳米技术
·
药学
·
胃肠病学
·
免疫学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）