U.S.-Brazil Cooperative Science Research in the Study of Amorphous Hydrogenated Germanium

该奖项支持合作材料研究， 半导体应用物理学将由威廉 哈佛大学的保罗和 巴西圣保罗州坎皮纳斯大学。 这项工作将涉及研究的基本性质 非晶氢化锗，特别是那些重要的 用于光电应用。 虽然类似的材料， 无定形氢化硅是用于制造硅晶片的常用材料。 薄膜太阳能电池和场效应晶体管，这 研究将寻求更基本的了解非 由氢化硅制成的晶体半导体， 锗合金和非合金非晶氢化 锗。 这项工作将联合收割机的努力，两个实验室， 其中有专门的设施。 他们将交换样本， 应用新的研究技术并在分析中进行合作 的结果，以达到改善理论的锗 材料和合金。 哈佛的特殊设施 包括辉光放电、光化学气相沉积 溅射：那些在坎皮纳斯，溅射和反应 蒸发 坎皮纳斯有穆斯堡尔谱仪 而哈佛有特殊的设施， 扫描量热法、气体析出和飞行时间 测量. 显然，设施，经验和 这两个小组的专业知识将相互补充， 这项合作将推动科学和设备 非晶半导体的参数。

This award supports cooperative materials research in the applied physics of semiconductors to be conducted by William Paul of Harvard University and Ivan Chambouleyron of the University of Campinas in the state of Sao Paulo, Brazil. This work will involve a study of the fundamental properties of amorphous hydrogenated germanium, especially those important for photoelectronic applications. While a similar material, amorphous hydrogenated silicon is the usual material used for thin film solar cells and field-effect transistors, this research will seek more fundamental understanding of non- crystalline semiconductors made of hydrogenated silicon- germanium alloys and unalloyed amorphous hydrogenated germanium. This work will combine the efforts of two laboratories, each of which has special facilities. They will exchange samples, apply new research techniques and collaborate in the analysis of results to arrive at improved theories for the germanium materials and the alloys. Specific facilities at Harvard include glow discharge, photo-chemical vapor deposition and sputtering: those at Campinas, sputtering and reactive evaporation. Campinas has Mossbauer spectroscopy available while Harvard has special facilities for differential scanning calorimetry, gas evolution and time of flight measurements. Clearly, the facilities, experience and expertise of these two groups will complement each other and the collaboration will advance the scientific and device parameters of amorphous semiconductors.