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Your search keyword '"Liu, Hong-Mei"' showing total 2 results
Start Over Author "Liu, Hong-Mei" Publisher american institute of physics
2 results on '"Liu, Hong-Mei"'

1. Discussion on Preparation of Recycled Materials from Construction Waste.

Author

Liu Hong-mei and Tian Gao

Subjects
*CONSTRUCTION industry waste minimization, *DEMOLITION, *RENEWABLE energy sources, *CEMENT, *STRENGTH of materials, *SPECIFIC gravity
Abstract

Describing the background of the recycling of construction waste; listing domestic and foreign construction waste related policies and the latest research progress; taking a certain city in eastern China as an example. The analysis of the composition of its urban demolition garbage, relying on the actual production of enterprises, put forward the basic process of building rubbish screening. Analysis of the use of renewable resources, focusing on the analysis of the preparation of recycled brick technology. When studying the ratio of recycled brick raw materials, it is found that with the decrease of the proportion of natural aggregate in recycled brick, the properties such as brick strength are reduced; The higher the specific gravity of cement and other adhesives, the higher the strength of bricks. Finally, putting forward their views on the future development of China's construction waste to. [ABSTRACT FROM AUTHOR]

Published
2018
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2. High-efficiency endothermic energy transfer in polymeric light-emitting devices based on cyclometalated Ir complexes.

Author

Liu, Hong-Mei, Wang, Peng-Fei, He, Jian, Zheng, Caijun, Zhang, Xiao-Hong, Chew, Siew-Ling, Lee, Chun-Sing, Chang, Jack, and Lee, Shuit-Tong

Subjects
*ENERGY transfer, *IRIDIUM, *LIGHT emitting diodes, *ELECTROLUMINESCENT devices, *ELECTROLUMINESCENCE
Abstract

We report polymeric light-emitting diodes (PLEDs) made from pinene-substituted iridium(III) phosphorescent dopants: tris(5-(4-difluoro phenyl)-10,10-dimethyl-4-aza-tricycloundeca-2,4,6-triene) iridium (III) [Ir(F-pppy)3] and tris(5-(2,4-difluorophenyl)-10,10-dimethyl-4-aza-tricycloundeca-2,4,6-triene) iridium (III) [Ir(F2-pppy)3]. The pinene substitution introduces steric hindrance to molecular structure of the dopant that reduces triplet-triplet annihilation between dopants and consequently enhances device performance. Via endothermic energy transfer from poly(vinylcarbazole) to Ir(F-pppy)3 and Ir(F2-pppy)3, a peak electroluminescent efficiency of 32.8 cd/A or 12.3 cd/A at 12 wt % Ir(F-pppy)3 or 15 wt % Ir(F2-pppy)3 doped and solution-processed PLEDs have been obtained. These values represent significant improvement in performance over previously reported endothermic energy-transfer based electrophosphorescent devices. [ABSTRACT FROM AUTHOR]

Published
2008
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