Environment of Er Doped in a-Si:H and Its Relation with Photoluminescence Spectra

作     者：Minoru Kumeda Yoshitaka Sekizawa Akiharu Morimoto Tatsuo Shimizu 

作者机构：Div. Electrical Engineering and Computer Science Grad. School of Natural Sci. & Tech. Kanazawa Univ. Japan Professor Emeritus Kanazawa Univ. Japan 

出 版 物：《MRS Online Proceedings Library》 

年 卷 期：2011年第910卷第1期

页      面：2-7页

主　　题：Er amorphous luminescence 

摘      要：The crystal-field potential at the Er3+ ion surrounded by six oxygen ions is expanded in terms of polynomials. After converting it into equivalent angular momentum operators, the Stark-splitting of the 4I15/2 ground state of the Er3+ ion is calculated. Influence of the change in the environment of the Er3+ ion on the shift of the energy levels is investigated and compared with the observed Er photoluminescence spectrum in a-Si:H. The scattering of the calculated energy levels by the structural fluctuation around the Er3+ ion is also compared with the linewidth of the component photoluminescence lines.