Results 101 to 110 of about 23,831 (231)

Spirobifluorene fusion in multiple resonance frameworks enables efficient pure‐red OLEDs with narrowband emission and suppressed efficiency roll‐off

FlexMat, EarlyView.
An orthogonal spirobifluorene‐fusion strategy is introduced for B/N/O‐alternated MR frameworks, enabling improved kRISC (5.46 × 103 s−1), high ΦPL (97%), and narrow‐band pure‐red emission. Vacuum‐evaporated OLEDs incorporating this emitter achieve an EQEmax >40% (FWHM = 36 nm) and exhibit exceptionally low efficiency roll‐off at high luminance ...
Yan‐Yun Jing, Han Wu, Xiaoling Xu, Sijie Xian, Jingsheng Miao, Xiaojun Yin, Chuluo Yang, Xiaosong Cao   +7 more
wiley   +1 more source

Lead‐free halide perovskites for efficient light‐emitting devices

FlexMat, EarlyView.
Overview of Lead‐free metal halide perovskites with different categories and optoelectronic application directions, including solid‐state lighting, light‐emitting diodes, piezoluminescence, flexible electronics, scintillators and CPL emitters. Abstract Lead halide perovskites exhibit promising optoelectronic properties for optoelectronic applications ...
Yueqi Shen, Kefan Meng, Yiqi Zhao, Chaoran Zhou, Jiaye Shu, Di Zhang, Chengqian Cao, Wanxin Chen, Yefeng Zhou, Weihua Ning   +9 more
wiley   +1 more source

Novel Y₂(SO₄)₃:Eu³⁺ Phosphors with Anti-Thermal Quenching of Luminescence Due to Giant Negative Thermal Expansion

Crystals
One of the most critical problems for phosphors used in light-emitting diodes (LEDs) is the thermal quenching of luminescence. Herein, novel (Y1−xEux)2(SO4)3 (x = 0, 0.17, 0.33, 0.5, 0.66) phosphors with anti-thermal quenching of luminescence due to ...
Andrey P. Shablinskii, Olga Yu. Shorets, Alexey V. Povotskiy, Rimma S. Bubnova, Maria G. Krzhizhanovskaya, Svetlana Yu. Janson, Valeri L. Ugolkov, Stanislav K. Filatov   +7 more
doaj   +1 more source

Highly efficient blue crystalline organic light‐emitting diodes enabled by a hot exciton sensitizer PyPO

FlexMat, EarlyView.
Two different sensitization structures (hot exciton sensitizer type and exciton nanoaggregate type) were integrated into crystalline host matrix. The resulting crystalline organic light‐emitting diodes exhibit low Joule heat loss ratio and high photon output.
Hao Hu, Bo Yu, Ping Lu, Feng Zhu, Donghang Yan   +4 more
wiley   +1 more source

High efficient light emitting devices with additiona scattering layer and reflecting medium for white lig generation

Moldavian Journal of the Physical Sciences, 2008
Multiexcitation of phosphors, additional scattering layer around the chip and special re- flecting medium were proposed to improve the luminous efficiency and color properties of LED devices.
Nazarov, Mihail
doaj  

Thermographic properties of eight blue-emitting phosphors [PDF]

, 1993
We examined the effect of temperature on the light absorption and emission properties of eight phosphorescent compounds. These phosphors are commercially produced powders that emit mainly in the blue region when illuminated with ultraviolet light in the ...
Cunningham, D. M., Allison, S. W., Smith, D. B.   +2 more
core  

Advancing super‐resolution stimulated emission depletion microscopy with luminescent lanthanide nanocrystals

FlexMat, EarlyView.
The state‐of‐the‐art research advances and its cutting‐edge application in super resolution stimulated emission depletion technology based on luminescent lanthanide nanocrystals. Abstract Stimulated emission depletion (STED) microscopy overcomes the diffraction limit to reveal subcellular structures beyond the reach of conventional optical methods ...
Yaqi Chen, Tengfei Ma, Shuping Huang, Wei Guo, Yiming Wu   +4 more
wiley   +1 more source

Research progress in photo‐controlled radical involved luminescence materials

FlexMat, EarlyView.
This review systematically dissects radical generation mechanisms, triplet‐exciton photophysics, material design strategies, and cutting‐edge applications in smart encryption, environmental sensing, and 3D printing. Abstract In recent years, photo‐controlled radical room‐temperature phosphorescent (RTP) materials have shown significant application ...
Sichen Meng, Shengwen Bao, Xiang Li, Shuaishuai Lu, Danfeng Ye, Ying Liu, Deli Sun, Hongwei Wu, Liangliang Zhu   +8 more
wiley   +1 more source

Recent advances and prospects for high‐efficiency blue hot exciton organic light‐emitting diodes

FlexMat, EarlyView.
Blue organic light‐emitting diodes (OLEDs) face great challenges in achieving the balance between color purity, device efficiency, and stability. Hot exciton materials offer a solution by rapidly converting non‐emissive triplet excitons into singlet ones through a high‐lying reverse intersystem crossing process.
Xiaoen Shi, Shuyuan Ge, Futong Liu, Ping Lu   +3 more
wiley   +1 more source

Local Structure–Luminescence Correlation in Eu3+‐Doped Phosphors: A Comprehensive Review

Advanced Photonics Research
The luminescence properties of the phosphors are determined by the electronic configuration of the activator ions and are also affected by the coordinated environment of the activator ions in the matrix.
Guihua Li, Gemei Cai, Xiao‐Jun Wang
doaj   +1 more source