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八钢低碳冶金技术路径研究及实践探讨 被引量:3
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作者 季书民 《新疆钢铁》 2022年第1期5-11,共7页
文章分析了八钢在降低碳排放过程中低碳冶金技术的实施方法、研发路径,介绍了提高极致效率、富氢碳循环技术、非高炉炼铁及碳捕集利用技术、冶金资源循环利用技术、低碳数智管控等,以及八钢实施降低碳排放工艺技术的应用效果。
关键词 碳排放 极致效率 碳循环 富氢冶金 废钢 CO_(2)捕集 绿电
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Stabilizing electroluminescence color of blue perovskite LEDs via amine group doping 被引量:6
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作者 Fengjuan Zhang Jizhong Song +4 位作者 Bo Cai Xi Chen Changting Wei Tao Fang Haibo Zeng 《Science Bulletin》 SCIE EI CSCD 2021年第21期2189-2198,M0004,共11页
Voltage loading-induced change in the electroluminescence(EL)wavelength of mixed halide perovskite light-emitting diodes(PeLEDs),so-called color-shift,has become an inevitable phenomenon,which is seriously unfavorable... Voltage loading-induced change in the electroluminescence(EL)wavelength of mixed halide perovskite light-emitting diodes(PeLEDs),so-called color-shift,has become an inevitable phenomenon,which is seriously unfavorable to their applications in lighting and display.Here,we achieve color-stable blue PeLEDs via a hydrogen-bonded amine-group doping strategy.Selecting guanidine(GA)or formamidinium(FA)as amine-group(-NH_(2))doping source for CsPbBr_(x)Cl_(3-x)quantum dots(QDs),experimental and theoretical results reveal that the strong N-H…X(X=Br/Cl)bonding can be produced between-NH_(2)dopants and Pb-X lattices,thereby increasing the migration barrier of halide anions.Resultantly,color-stable sky-blue devices were realized with emission peaks fixed at 490.5(GA)and 492.5(FA)nm without any obvious shift as the voltage increases,in sharp contrast devices without N-H…X producing a 15 nm red-shift from 487 to 502 nm.Not only that,maximum external quantum efficiency is improved to 3.02%and 4.14%from the initial 1.3%.This finding offers a convenient boulevard to achieve color-stable PeLEDs with high efficiency. 展开更多
关键词 Light-emitting diodes Perovskites Quantum dots Hydrogen bond Amine-group doping Color stability
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Thermally activated delayed fluorescence materialsensitized helicene enantiomer-based OLEDs:a new strategy for improving the efficiency of circularly polarized electroluminescence 被引量:5
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作者 Meng Li Yin-Feng Wang +4 位作者 Da-Wei Zhang Dongdong Zhang Zhi-Qiang Hu Lian Duan Chuan-Feng Chen 《Science China Materials》 SCIE EI CAS CSCD 2021年第4期899-908,共10页
A new strategy of thermally activated delayed fluorescence(TADF)material-sensitized circularly polarized luminescence(CPL)has been proposed for improving the efficiencies of fluorescent circularly polarized organic li... A new strategy of thermally activated delayed fluorescence(TADF)material-sensitized circularly polarized luminescence(CPL)has been proposed for improving the efficiencies of fluorescent circularly polarized organic lightemitting diodes(OLEDs)(CP-OLEDs).Consequently,a pair of helicene enantiomers,(P)-HAI and(M)-HAI,were synthesized.The helicene enantiomers with the rigid helicalπ-skeleton had highly thermal and enantiomeric stabilities,and they also showed excellent photophysical properties,especially,intense mirror-image CPL activities with large luminescence dissymmetry factor(|g_(lum)|)values of about 6×10^(-3).Notably,the CP-OLEDs with the helicene enantiomers as emitters and a TADF molecule as sensitizer not only displayed better performance of lower turn-on voltage(V_(T))of 2.6 V,four-fold maxmium-external quantum efficiency(EQE_(max))of 5.3%,and lower efficiencies roll-off of 1.9%at 1000 cd m^(-2),than those of the devices without TADF sensitizer,but also exhibited intense circularly polarized electroluminescence(CPEL)with the electroluminescence dissymmetry factor(g_(EL))values of-2.3×10^(-3)and+3.0×10^(-3).Meanwhile,this study also represents the first thermally activated sensitized fluorescent CP-OLEDs with markedly enhanced efficiencies and intense CPEL. 展开更多
关键词 thermally activated sensitized emission HELICENE ELECTROLUMINESCENCE circularly polarized light organic lightemitting diodes
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