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Chinese Journal of Luminescence

Chinese Journal of Luminescence Chinese Journal of Luminescence
  • Editor-in-Chief:Fengyi Jiang
  • ISSN:1000-7032
  • eISSN:2097-3195
  • CN:22-1116/O4
  • Supervisor:Chinese Academy of Sciences
  • Sponsor:Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Luminescence Branch of Chinese Physical Society, State Key Laboratory of Luminescence and Applications
  • Publication frequency:Monthly
  • Tel.:0431-86176862
  • E-mail:fgxbt@126.com
  • Address:No.3888 Dong Nanhu Road, Changchun, Jilin, China
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Vol. 45 期 12，2024 2024年45卷第12期

  • Cover Story

    “最新研究发现，3-CzAIAd和3-DPFCzAIAd两种新型TADF发射体在发光器件性能上优于其异构体，为高效发光器件提供新选择。”

    FENG Quanyou, CAO Yue, HAN Qiuhu, CHANG Yongzheng, YU Mengna, TAN Kesheng, XU Man, XIE Linghai

    DOI：10.37188/CJL.20240233
    摘要：We designed and synthesized two novel thermally activated delayed fluorescence emitters， 3-CzAIAd and 3-DPFCzAIAd， and performed a comparative analysis with their isomeric counterparts， 4-CzAIAd and 4-DPFCz-AIAd. The substitution position of the carbazole unit plays a critical role in modulating the photophysical properties of the emitters and the device performance of organic light-emitting diodes. Emitters with carbazole units substituted at the 3-position of phthalimide group exhibited higher triplet energy levels， smaller singlet-triplet energy gaps， lower photoluminescence quantum yields， and more red-shifted emission spectra. Devices incorporating 3-DPFCzAIAd achieved a maximum external quantum efficiency of 20.8%， a peak current efficiency of 57.1 cd·A⁻¹， and an operational half-lifetime of 260 h under an initial luminescence of 500 cd·m⁻². Conversely， while devices based on 4-DPFCzAIAd exhibited a higher peak EQE of 28.2%， they experienced a shorter operational lifetime of 178 h under an initial luminescence of 500 cd·m⁻² and more pronounced efficiency roll-off of up to 77%.  
    关键词：thermally activated delayed fluorescence;emitter;phthalimide;isomer   
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  • Invited Review

    “光致发光气凝胶结合气凝胶和发光材料特性，具有大比表面积、高孔隙度等优点，在传感、光电器件等领域应用广泛。”

    CHEN Xiumei, LI Xingyu, YUAN Ze, XIE Xiaoji

    DOI：10.37188/CJL.20240210
    摘要：Photoluminescent aerogels， possessing the combined features of aerogels and luminescent materials， are a novel type of porous luminescent materials. Photoluminescent aerogels are characterized by unique properties， such as large specific surface area， high porosity， flexible structure， and controllable optical properties， and thus hold wide promise for diverse applications， particularly in sensing and optoelectronic devices. Focusing on photoluminescent aerogels， this review summarizes the preparation methods of aerogels， systematically introduces the aerogel according to the classification of luminescent centers， and discusses the application of the aerogel in the fields of sensing and optoelectronic devices. Finally， challenges and perspectives of photoluminescent aerogels are discussed.  
    关键词：photoluminescence;aerogel;rare earth;nanocrystal   
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  • “高掺Er3+纳米晶上转换发光研究取得显著进展，专家深入解析发光性质调控策略，为光信息安全等领域提供新方向。”

    YAN Long, MA Chonggeng, ZHOU Bo

    DOI：10.37188/CJL.20240230
    摘要：Over recent years， research into the upconversion luminescence properties of highly doped Er3+ nanocrystals has undergone rapid advancement. Compared to traditional doping materials， these materials exhibit unique features such as multi-band excitation， strong excitation wavelength penetration， dynamic control over optical color， and highly sensitive to external field stimuli， showing great promise in various research domains including optical information security， temperature sensing， and bioimaging. This review provides a comprehensive overview of the techniques for tuning upconversion luminescence intensity， emission colors， decay characteristics， and excitation bands through ways of such as matrix composition， structural design， and energy transfer processes. Additionally， we explore the impact of external field stimuli such as temperature， pressure， and metal surface electric fields on the luminescence properties of highly Er3+ doped nanocrystals. The mechanisms behind luminescence enhancement are discussed in terms of increased multiphoton transition probabilities and reduced non-radiative energy losses. Finally， we summarize the research on modulating excitation modes in highly doped Er3+ nanocrystals and propose directions for future investigations.  
    关键词：heavily Er3+ doping;upconversion;multi-dimensional regulation;nanocrystals   
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  • Synthesis and Properties of Materials

    “最新研究进展显示，通过高温固相法合成的钙钛矿结构荧光粉，实现了近红外一区宽带发射特性的连续调谐，为近红外荧光粉设计提供新依据。”

    SUN Jianfeng, JI Shijun, MENG Zehan, XIN Haoyang, ZHAO Yonglei, YAN Kaiyi

    DOI：10.37188/CJL.20240246
    摘要：Near-infrared （NIR） phosphor-converted light-emitting diodes （pc-LEDs） hold great promise for versatile applications such as non-destructive analysis， machine vision and biological imaging. Currently， exploring efficient broadband tunable NIR-Ⅰ-emitting phosphors applicable for NIR pc-LEDs has been an ongoing focus among material researchers. Herein， we firstly synthesize two kinds of NIR-emitting perovskite-type Sr3MgTa2O9∶Cr3+ and Ba3MgTa2O9∶Cr3+ phosphors via the solid-state reaction， both of which possess the characteristic of broadband emission bands covering the NIR-Ⅰ spectral range from 700 nm to 1 000 nm. Fine regulating Ba2+/Sr2+ dopant ratio in （Sr1-mBam）3MgTa2O9∶Cr3+ solid-solution phosphors further achieves the continuously adjustable NIR luminescence with the emission peak position tuning from 786 nm to 848 nm， due to the weakened crystal field environment of crystallographic Mg2+ site which is occupied by Cr3+ ion. The representative Sr0.4Ba0.6MgTa2O9∶0.015Cr3+ phosphor exhibits high internal quantum efficiency （82.1%） and favorable thermal stability （I423 K/I298 K=73.6%）， which is competitive with some other emerging Cr3+-doped NIR-emitting phosphors. Finally， a prototype NIR pc-LED by utilizing Sr0.4Ba0.6MgTa2O9∶0.015Cr3+ phosphor and a blue LED chip achieves the NIR output power of 13.7 mW at 60 mA， exhibiting its enormous potential for practical applications in the fields of veins imaging and night vision. The present study develops a series of novel NIR-emitting perovskite-type phosphors with excellent luminescent properties based on the mineral-type structural prototype and cationic substitution strategy， which will provide a basis for design of Cr3+-doped broadband tunable NIR-Ⅰ-emitting phosphors.  
    关键词：（Sr，Ba）3MgTa2O9∶Cr3+;Perovskite-type structure;near-infrared luminescence;crystal field;NIR pc-LED   
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