• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国政府科技报告 >Development of Quantum Dot Materials for Optical Devices by the Sol-Gel Method
【24h】

Development of Quantum Dot Materials for Optical Devices by the Sol-Gel Method

机译：用溶胶 - 凝胶法开发光学器件的量子点材料

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This Final Technical Report presents a summary of the research conducted fromJune, 1994 to January, 1998 on the development of semiconductor quantum dot materials prepared by a sol-gel method. The process involved the preparation of a sol-gel liquid solution with a chemical composition corresponding to that of a sodium borosilicate glass, the addition of a cadmium salt to the solution, the formation of a porous gel, the conversion of the cadmium salt to CdS and the densification of the gel into a glass at around 5OO deg C. By systematic variation of processing conditions OdS quantum dots (OD) of uniform size and size distribution were prepared. For the first time, optical gains were achieved at room temperature. By ion-exchange of K for Na, waveguides were fabricated. The OdS particles were shown to be single crystals of about 4oA in dimension. Techniques were developed to prepare CdTe and PbS OD's in sodium borosilicate glass. Not only are the Bohr radii of PbS and OdTe much larger than that of OdS, which will give more efficient OD's samples, but the beginning of a systematic study of these three semiconductors would shed light on the presently unknown effects of the relatively large surface areas of QE's. A search of the literature revealed that the semiconductor SbSl is also a ferroelectric. It is theorized that an electric field induced dipole in SbSl would act to pin down the exciton created by a laser beam. Thus, longer life-times of the electron-hole pair are possible. Preliminary work has resulted in the successful preparation of SbSl OD's in the same sodium borosilicate glass. Verification of the behavior of SbSl now awaits further research.

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号