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Your search keyword '"Xiao-ping WANG"' showing total 13 results
Start Over Author "Xiao-ping WANG" Journal chinese physics letters
13 results on '"Xiao-ping WANG"'

2. Influence of Blocking Interlayer in Blue Organic Light-Emitting Diodes with Different Thicknesses of Emitting Layer and Interlayer

Author

Zhi-Qi Kou, Shuang Cheng, Xiao-Ping Wang, and Jian-Qi Shen

Subjects
010302 applied physics, Materials science, business.industry, Blocking (radio), General Physics and Astronomy, 02 engineering and technology, Electron, 021001 nanoscience & nanotechnology, 01 natural sciences, 0103 physical sciences, OLED, Optoelectronics, 0210 nano-technology, business, Layer (electronics), Electrical efficiency, Diode
Abstract

A series of blue organic light-emitting diodes with electron or hole blocking interlayer are fabricated. Different structures of blocking interlayers can influence the position of the recombination zone due to the fact that they confine carriers in different ways. We find that the double hole blocking interlayer structure can balance carrier injection more effectively. Its power and current efficiency are more stable and the current efficiency value is 30.2 cd/A at 1000 cd/m2. Decreasing the thicknesses of the emitting layer and interlayers is in favor of the power efficiency. The performance of the device is also affected by changing the interlayer position when we use hole and electron blocking material as interlayers simultaneously.

Published
2016

11. Observation of Strong-Coupling Pairing with Weakened Fermi-Surface Nesting at Optimal Hole Doping in Ca0.33Na0.67Fe2As2.

Author

Ying-Bo Shi, Yao-Bo Huang, Xiao-Ping Wang, Xun Shi, A-Van Roekeghem, Wei-Lu Zhang, Na Xu, Pierre Richard, Tian Qian, Emile, Rienks, S, Thirupathaiah, Kan Zhao, Chang-Qing Jin, Ming Shi, and Hong Ding

Subjects
COUPLING reactions (Chemistry), PHOTOELECTRON spectroscopy, FERMI surfaces, ENERGY-band theory of solids, ALGEBRAIC topology, PHYSICAL & theoretical chemistry
Abstract

We report an angle-resolved photoemission investigation of optimally doped Ca0.33Na0.67Fe2As2. The Fermi surface topology of this compound is similar to that of the well-studied Ba0.6K0.4Fe2As2 material, except for larger hole pockets resulting from a higher hole concentration per Fe atoms. We find that the quasi-nesting conditions are weakened in this compound compared to Ba0.6K0.4Fe2As2. Similar to Ba0.6K0.4Fe2As2, we observe nearly isotropic superconducting gaps with Fermi surface-dependent magnitudes for Ca0.33Na0.67Fe2As2. A small variation in the gap size along the momentum direction perpendicular to the surface is found for one of the Fermi surfaces. Our superconducting gap results on all Fermi surface sheets fit simultaneously very well to a global gap function derived from a strong coupling approach, which contains only 2 global parameters. [ABSTRACT FROM AUTHOR]

Published
2014
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