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Hybrid remote quantum dot/powder phosphor designs for display backlights

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Light(Science & Applications) 2016年第1期5卷 11-19页

作者： Sofie Abe Jonas J Joos Lisa IDJ Martin Zeger Hens Philippe F Smet Department of Inorganic and Physical Chemistry Ghent UniversityGentBelgium Department of Solid State Sciences LumiLabGhent UniversityGentBelgium Center for Nano and Biophotonics Ghent UniversityGentBelgium

Quantum dots are ideally suited for color conversion in light emitting diodes owing to their spectral tunability,high conversion efficiency and narrow emission *** properties are particularly important for display backlights;the highly saturated colors generated by quantum dots justify their higher production ***,we demonstrate the benefits of a hybrid remote phosphor approach that combines a green-emitting europium-doped phosphor with red-emitting CdSe/CdS core/shell quantum *** stacking geometries,including mixed and separate layers of both materials,are studied at the macroscopic and microscopic levels to identify the configuration that achieves maximum device efficiency while minimizing material *** influence of reabsorption,optical outcoupling and refractive index-matching between the layers is evaluated in detail with respect to device efficiency and *** the findings of this study,general guidelines are derived to optimize both the cost and efficiency of CdSe/CdS and other(potentially cadmium-free)quantum dot *** reabsorption of the green and/or red emission is significant compared to the absorption strength for the blue emission of the pumping light emitting diode,the hybrid remote phosphor approach becomes beneficial.

关键词： cost-efficiency lanthanide light emitting diode nanocrystal remote phosphor

A strategy for enhancing luminescence thermometry via Ta^(5+)-triggered K_(0.5)Na_(0.5)NbO_(3):Er^(3+)transparent ceramics

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Journal of Materiomics 2024年第5期10卷 984-994页

作者： Quan Zhang Zetian Yang Mingyuan Wang Yang Liu Shuangying Lei Laihui Luo Dirk Poelman Key Laboratory of MEMS of Ministry of Education School of Electrical Science and EngineeringSoutheast UniversityNanjing210096China lumilab Department of Solid StateSciencesGhent UniversityKrijgslaan 281-S1GhentB-9000Belgium School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing210094China Department of Microelectronic Science and Engineering Ningbo UniversityNingbo315211China

Luminescence thermometry is a reliable approach for remote thermal sensing,and extensive studies have been devoted to designing a luminescence thermometer with heightened thermal ***,we report a promising luminescence thermometric material,Ta^(5+)-substituted K_(0.5)Na_(0.5)NbO_(3):0.003Er^(3+)transparent ferroelectric *** temperature sensing sensitivity is significantly improved by adjusting the concentration of Ta^(5+)in the ***,utilizing the fluorescence intensity ratio from the 2H_(11/2) and 4S_(3/2) thermally coupled states of Er^(3+)as a detecting signal within the temperature range of 273–543 K,an optimal maximum absolute sensitivity of 0.0058 K–1 and relative sensitivity of 0.0158 K–1 are achieved for K_(0.5)Na_(0.5)NbO_(3):0.65Ta^(5+)/0.003Er^(3+).Simultaneously,as the concentration of Ta5+increase,a unique evolution of structural phase transitions is observed from orthorhombic to tetragonal and then to *** is accompanied by an improvement in luminescence temperature sensing properties,and the best sensitivity is demonstrated in the cubic-phase ***,a huge change in infrared luminescence properties as a function of temperature is found around the structure transition temperature of the *** results indicate a promising potential for achieving highly sensitive thermometry or monitoring phase structure transitions through luminescence thermometry behavior in the K_(0.5)Na_(0.5)NbO_(3) host.

关键词： Transparent ceramics Temperature sensing Phase transition Upconversion emission

Photoreceptor-Mediated Bending towards UV-B in Arabidopsis

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Molecular Plant 2014年第6期7卷 1041-1052页

作者： Filip Vandenbussche Kimberley Tilbrook Ana Carolina Fierro Kathleen Marchal Dirk Poelman Dominique Van Der Straeten Roman UIm boratory of Functional Plant Biology Department of Physiology Faculty of Sciences Ghent University B-9000 Ghent Belgium Department of Botany and Plant Biology Sciences III University of Geneva CH-1211 Geneva 4 Switzerland Department of Microbial and Molecular Systems Faculty of Bioscience Engineering KU Leuven B-3001 Heverlee Belgium Department of Plant Biotechnology and Bioinformatics Faculty of Sciences Ghent University B-9000 Ghent Belgium Department of Information Technology IMinds Faculty of Sciences Ghent University B-go00 Ghent Belgium lumilab Department of Solid State Sciences Faculty of Sciences Ghent University B-9000 Ghent Belgium

Plants reorient their growth towards light to optimize photosynthetic light capture--a process known as phototropism. Phototropins are the photoreceptors essential for phototropic growth towards blue and ultraviolet-A （UV- A） light. Here we detail a phototropic response towards UV-B in etiolated Arabidopsis seedlings. We report that early differential growth is mediated by phototropins but clear phototropic bending to UV-B is maintained in photl phot2 double mutants. We further show that this phototropin-independent phototropic response to UV-B requires the UVoB photoreceptor UVR8. Broad UV-B-mediated repression of auxin-responsive genes suggests that UVR8 regulates directional bending by affecting auxin signaling. Kinetic analysis shows that UVR8-dependent directional bending occurs later than the phototropin response. We conclude that plants may use the full short-wavelength spectrum of sunlight to efficiently reorient photosynthetic tissue with incoming light.

关键词： phototropism UV-B auxin UVR8 Arabidopsis,

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聚酯表面的生物技术改性

国际纺织导报 2011年第2期39卷 22-23,27页

作者： V. A. Nierstrasz L．V．Langenhove P．Kiekens I．Donelli G．Freddi P．Smet D．Poelman 喻盈捷（译）行兰（校） Ghent大学纺织系比利时丝绸研究所意大利根特大学lumilab比利时不详

合成纤维是纺织工业的重要组成部分。合成纤维的缺点是其亲水度低,PET纤维特别疏水,这影响纤维的加工性和功能性。比较新颖、有前途、可供选择的方法是酶用于合成纤维的表面改性。已经报道,用酶水解酯键,从而提高聚酯的亲水度。这一促... 详细信息

合成纤维是纺织工业的重要组成部分。合成纤维的缺点是其亲水度低,PET纤维特别疏水,这影响纤维的加工性和功能性。比较新颖、有前途、可供选择的方法是酶用于合成纤维的表面改性。已经报道,用酶水解酯键,从而提高聚酯的亲水度。这一促进功能化的过程,目标是用现代的生物技术使PET纺织材料功能化。结果将形成新的特定知识和技术,产生用生物技术改性的纺织材料,从而有助于向生物型经济转变。

关键词：聚酯表面酶生物技术改性功能化

采用水基前驱溶液喷墨印刷制备光催化活性TiO_2薄膜

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中国印刷与包装研究 2012年第5期4卷 67-71页

作者： ARIN Melis LOMMENS Petra AVCI Nursen HOPKINS Simon C BUYSSER Klaartje De ARABATZIS Ioannis M FASAKI Ioanna POELMAN Dirk DRIESSCHE Isabel Van 何文 SCRIPTS Department of Inorganic and Physical Chemistry Ghent University Krijgslaan 281 (S3) 9000 Ghent Belgium lumilab Department of Solid State Sciences Ghent University Krijgslaan 281 (S1) 9000 Ghent Belgium Department of Materials Science and Metallurg University of Cambridge Pembroke Street Cambridge CB2 3QZ United Kingdom NanoPhos SA PO Box 519 Science & Technology Park of Lavriou Lavrio 19500 Attica Greece

近年来,作为一种高能量带隙半导体,二氧化钛(TiO_2)由于在紫外光照射下具有良好的光催化活性,已引起科研人员的广泛关注。由于TiO_2无色透明,具有广泛的应用前景,如薄的TiO_2涂层可用于创建自清洁、防雾、超亲水表面。同时,也能用于太... 详细信息

近年来,作为一种高能量带隙半导体,二氧化钛(TiO_2)由于在紫外光照射下具有良好的光催化活性,已引起科研人员的广泛关注。由于TiO_2无色透明,具有广泛的应用前景,如薄的TiO_2涂层可用于创建自清洁、防雾、超亲水表面。同时,也能用于太阳能电池等光电子行业。

关键词： TiO2 光催化喷墨印刷活性薄膜制备溶液光电子行业