| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Mechanical Property Evaluation of GaAs Crystal for Solar Cells |
| JIN Min**, FANG Yong-Zheng, SHEN Hui, JIANG Guo-Jian, WANG Zhan-Yong, XU Jia-Yue
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School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 200235
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| Cite this article: |
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JIN Min, FANG Yong-Zheng, SHEN Hui et al 2011 Chin. Phys. Lett. 28 086101 |
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Abstract The mechanical properties of Si-doped (111) GaAs crystal for solar cells are investigated by means of a microindentation technique. Vickers' microhardness Hv exhibits a nonlinear relationship with the applied load. In the range of 0.1–1 kg, Hv is decreased from 5.59 GPa to 5.03 GPa. Such a phenomenon is explained on the basis of indenter penetration. The Hv value can effectively be presumed by Kick's law, and Meyer's index n is calculated to be 1.90. For the fracture toughness Kc of the GaAs crystal, it also displays nonlinear behavior related to the applied load, which is caused by energy dissipation during the development process of cracks on the wafer.
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| Keywords:
61.66.Fn
61.72.Bb
62.20.-x
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Received: 22 December 2010
Published: 28 July 2011
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| PACS: |
61.66.Fn
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(Inorganic compounds)
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61.72.Bb
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(Theories and models of crystal defects)
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62.20.-x
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(Mechanical properties of solids)
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