CERAMICS INTERNATIONAL
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2025
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IF 5.6
Peiyuan Zhuang,Cong He,Huanlin Lv,Chunwen Ye,Yanjie Zhang,Bing Li
Inorganic perovskite quantum dots (PQDs) have great potential in display, lighting and other fields because of their high optical properties, narrow fluorescence emission half-peak width and convenient synthesis. However, the large Stokes shift (more than 155 nm) of KCsPbBr 3 PQDs results in more energy loss, and the maximum excitation peak is normally located at near-ultraviolet (NUV) region (∼365 nm), greatly limiting its application in lighting and displays based on blue light emitting diodes (LEDs). Herein, KCsPbBr 3 PQDs in lithium disilicate glass powders with a super broad excitation band in the range of 330–450 nm and narrow Stokes shift of ∼67 nm has been developed. Lithium disilicate glass with excellent mechanical properties are introduced as rigid armor to keep CsPbBr 3 PQDs from thermal and moisture attack, even maintaining the average particle size of ∼2.4 nm after high temperature calcination (600 °C). Interestingly, photoluminescence excitation spectrum of KCsPbBr 3 PQDs glass calcined at 600 °C presents which is entirely consistent with the emission wavelength of NUV and blue LEDs. In addition, the photoluminescence intensity of KCsPbBr 3 PQDs in lithium disilicate glass powders increases firstly and then decline sharply after calcination 600 °C, which exhibits with a narrow full width at half peak (FWHM) of ∼20 nm. The KCsPbBr 3 PQDs glass exhibits ultrahigh stable properties and maintains the photoluminescence emission intensity even soaked in deionized water for more than 85 days, indicating a great potential in fields such as green or white light lighting and fingerprint recognition.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2020
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IF 3.28
Bingxin Xie,Lei Lei,Enyang Liu,Gongxun Bai,Renguang Ye,Shiqing Xu
Novel blue LED excitable Ce 3+ -doped alkaline-earth sulfide nanocrystals are exploited for selective and sensitive Fe 3+ ions sensing in this work. The detection limit is calculated to be as low as 92.5 nM, which is better than most previous ultra-violet light excited fluorescence probes. The decreased radiative probability of the Ce 3+ : 5d by the NC surface environmental variation activates the sensing capability.
研究领域:
材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Nature Photonics
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2025
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IF 32.9
Jin Wangxiao,He Siyu,Lu Xiuyuan,Zhu Xitong,Liu Dijiong,Sun Guolong,Hao Yanlei,Chen Zuyan,Wang Chenyang,Zeng Jiejun,Zheng Zhi,Yan Xiaolin,Yan Yiran,Wu Longjia,Lin Xiongfeng,Hou Wenjun,Cao Weiran,Liu Chuan,Liang Xiaoci,Gao Yuan,Deng Yunzhou,Cao Kaisheng,Yang Yingguo,Gao Feng,Jin Yizheng
Solution-processed light-emitting diodes (LEDs) are appealing for their potential in the low-cost fabrication of large-area devices. However, the limited performance of solution-processed blue LEDs, particularly their short operation lifetime, is hindering their practical use in display technologies. Here we demonstrate that trace water in the device—previously considered detrimental to most solution-processed LEDs—dramatically enhances the performance of quantum-dot LEDs. This breakthrough stems from our comprehensive mechanism investigations into the positive aging phenomenon, a long-standing puzzle in the quantum-dot LED field. Our findings reveal that water passivation on the surface of electron-transporting layers, which are composed of zinc-oxide-based nanoparticles, improves charge transport and enhances exciton radiative recombination by suppressing hole leakage during device operation. Combined with the advanced top-emitting architecture, our blue quantum-dot LEDs achieve a high current efficiency of 37.1 cd A −1 , a blue index (colour-coordinate-corrected current efficiency) of over 490 cd A −1 \({{\rm{CIE}}}_{y}^{-1}\) and unprecedented stability, with an extrapolated T 95 lifetime (at an initial brightness of 1,000 cd m −2 ) of 287 h. Our work may inspire further exploration into surface passivation of nanocrystalline functional layers, critical for the advancement of emerging solution-processed optoelectronic and electronic devices.
研究领域:
光电子学
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纳米技术
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材料科学
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半导体器件
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显示技术
✓ 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）