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(1) When main stress of average stress exceeds tensile intensity of material, the element will crack
It is because of the mechanical property of concrete material.
When the element stress reaches material tensile strength, the crack begins to extend.
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Polymer-GaN Bulk Heterojunction Photovoltaic Cells Qian Feng *1,2,a, Yukun Li 1,2,b, Kai Du 1,2,c , Peng Shi 1,2,d, Qiang Wang 1,2,e, Qing Feng 1,2,f and Yue Hao 1,2,g 1School of Microelectronics, Xidian University, Xi’an 710071, China 2Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices, Xidian University,Xi’an 710071,China aqfeng@mail.xidian.edu.cn, bliyukun2007@163.com,c786580295@qq.com, d826585200@qq.com ewqiang0120@163.com, ffq986@163.com,gyhao@xidian.edu.cn Keywords: Photovoltaic cell, GaN nanocrystal, P3HT Abstract.
The hybrid polymer-GaN nanocrystal heterojunction solar cell has been fabricated by blending of GaN and regioregular poly(3-hexylthiophene)(P3HT) through solution process and spin-coating on the glass substrate, in which the Gallium Nitride(GaN) nanocrystal was successfully synthesized by means of sol-gel process The cell shows the Voc and Isc of 0.71V and 3.5mA/cm2 Introduction There has been great interest in hybrid organic–inorganic solar cells due to their low materials cost and solution based processing techniques, creating the potential for large-scale,cost-effective solar cells.
Acknowledgments This work is supported by the Basic Science Research Fund for the Central Universities(Grant No.K50511250009) Corresponding Author Name: Qian Feng, E-mail:qfeng@mail.xidian.edu.cn, Mobil:86-13992845562 References [1] M.C.
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This research was carried out under the project number MC2.02114 in the framework of the Research Program of the Materials innovation institute M2i (www.m2i.nl), the former Netherlands Institute for Metals Research.
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The interface of fiber and matrix strongly influences the performance and strength of fiber-reinforced composite materials.
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China 3School of Materials Science and Engineering, Harbin Institute of Technology, Weihai, Weihai, 264209, P.R.
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