Characterizing native point defects in ZnO bulk by positron annihilation spectroscopy

摘要：

Positron annihilation spectroscopy was employed to study the native point defects in ZnO single crystal, in combination with calculated results of positron lifetime and electron momentum distribution. The theoretical and experimental results of the positron lifetime in ZnO bulk ensure the presence of zinc monovacancy, and zinc monovacancy concentration begins to decrease above 600oC annealing treatment. Oxygen vacancies have been characterized by coincidence Doppler broadening (CDB) spectroscopy, combined with calculated electron momentum distribution. CDB spectroscopies show that oxygen vacancies dont appear until 600oC annealing treatment, and increase due to ZnO decomposition with annealing temperature rising.

关键词： positron annihilation coincidence Doppler broadening spectra ZnO point defects

作者: C.X.Peng H.M.Weng K.F.Wang F.L.Guo B.J.Ye X.Y.Zhou R.D.Han

作者单位: Physics Department,Henan University,Kaifeng 475004,Peoples Republic of China Modern Physics Department,University of Science and Technology of China,Hefei 230026,Peoples Republ

会议类型: 国际会议

会议名称: 第九届国际正电子与正电子素国际会议(9th International Workshop on Positron and Positronium Chemistry)(PPC–9)

会议地点: 武汉

会议语种:英文

页码: 137-139

在线出版日期: 2008-05-11（万方平台首次上网日期，不代表论文的发表时间）