JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Zhifeng Li,Haowen Yan,Zhaoyi Yin,Guofeng Zhang,Yichao Wang,Sicheng Gao,Jie Pan,Zhiguo Song,Jianbei Qiu,Yongjin Li
The efficient utilization of near-infrared (NIR) light is an important challenge to extend the spectral response range of photocatalysts. Here, the NIR photocatalytic performance of Bi 3 O 4 Br nanosheets was significantly enhanced by a rare earth ion doping strategy that synergistically utilizes the dual mechanism of photon conversion and energy band modulation. Under 980 nm excitation, the Bi 3 O 4 Br:Er 3 + nanosheets exhibit near-single-band green upconversion (UC) emission and are reabsorbed by Bi 3 O 4 Br. Combined with DFT density of states calculations, it is shown that the band gap of the material has been lowered and the carrier transport paths have been optimized by the energy-band structural tuning. In the NIR photocatalytic degradation experiment of bisphenol A, Bi 3 O 4 Br was not degraded, and Bi 3 O 4 Br:Er 3+ showed better performance, which was 2.27 times higher than that of Bi 3 O 4 Br:Yb 3+ , Er 3+ . ESR testing and capture experiments indicate that under NIR light irradiation, •OH and e − are the primary active species in the photocatalytic reaction process. This work provides new design ideas for the development of efficient NIR photocatalytic materials.
研究领域:
材料科学
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催化化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
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2024
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IF 8
Yangyang Du,Zhengyuan Jin,Ziyu Li,Tianying Sun,Haotian Meng,Xiaojuan Jiang,Yu Wang,Dengfeng Peng,Jianwei Li,Aiwu Wang,Hua Zou,Feng Rao,Feng Wang,Xian Chen
Visible-to-ultraviolet (UV) upconversion provides a fascinating strategy to achieve deep UV emission through readily accessible visible light. However, the intensity of deep UV emission obtained through visible-to-UV upconversion progress is still far from satisfactory, severely constraining its practical applications. Herein, a novel class of praseodymium ion (Pr 3+ )-doped rare-earth oxyhalides (YOCl, YOBr, and LuOBr) to achieve efficient upconverted deep UV emission in the spectral range of 250–350 nm is developed. The upconverted UV emission intensity of LuOBr:Pr 3+ is determined to be 56.7 times stronger than that of the well-established Lu 7 O 6 F 9 :Pr 3+ . When employed as a photon-converter to activate photocatalytic water splitting reactions, upconverted deep UV emission enables H 2 generation under visible light ( λ > 420 nm) excitation from a xenon lamp. The efficient deep UV upconversion stems from tuning 4 f 1 5 d 1 state of Pr 3+ by oxyhalide constituent which both facilitates the absorption of excitation photons in long-lived intermediate 4 f 2 states and suppress the probability of nonradiative relaxation from 4 f 1 5 d 1 state. These findings not only provide new insights into a mechanistic understanding of the host effect on upconversion process but also make a breakthrough in developing efficient deep upconversion materials that will expand their further applications.
研究领域:
材料科学
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光子学
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化学
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光电
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
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2025
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IF 26.8
Meng Cai,Wei Liu,Tiankai Zhang,Pengfei Yan,Yuxuan Li,Weiqian Kong,Hangjuan Wu,Zongwei Chen,Zhenkun Gu,Lin Dong,Qun Xu,Yanlin Song,Junjie Ma,Chongxin Shan,Feng Gao
All-inorganic CsPbX 3 (X = I, Br, Cl) perovskites emerged as a crucial material for addressing the stability bottleneck due to their exceptional resistance to both light-thermal stress. However, their performance is limited by adverse optoelectronic dissipation arising from inadequate photon conversion and chaotic carrier energetics. Herein, the mechanism of the unique nonlinear plasmonic effect in van der Waals 2D MoO 3-x is elucidated, which is mediated by electronic intermediate states. It demonstrates that the 2D MoO 3-x serves as a light-capture-antenna in heterodimensional CsPbX 3 -MoO 3-x optically coupled system, contributing to the accumulation the optical field energy on the nanoscale and resulting in a remarkable 59% increase in photon convergence. Additionally, facet-oriented carrier channels can be established through heteroepitaxy along matched Mo-O octahedron. This optoelectrical-bimodal-coupling engineering combined with a bifacial light-harvesting configuration yields a bifacial equivalent efficiency of 27.33%, which stands as the supreme performance in all-inorganic perovskite photovoltaics. Graphical This remarkable work combines supercritical CO 2 chemical engineering, two-dimension plasmon photophysical science, and perovskite photovoltaic technology. It introduces novel concepts like broad - spectrum coupled photon absorption, the intermediate - localized - states model, and optoelectrical - bimodal - coupling engineering. It aims to combat optoelectronic dissipation and enhance energy harvesting via a heterodimensional van der Waals optically coupled system.
研究领域:
光伏技术
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等离激元学
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纳米光子学
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材料科学
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光电子学
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钙钛矿太阳能电池
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固体物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）