Growth control and properties of microcrystallized silicon films deposited by hydrogen plasma sputtering

被引:10
作者
Achiq, A [1 ]
Rizk, R [1 ]
Madelon, R [1 ]
Gourbilleau, F [1 ]
Voivenel, P [1 ]
机构
[1] ISMRA UNIV,URA CNRS 1317,LERMAT,F-14050 CAEN,FRANCE
关键词
growth control; hydrogen plasma sputtering; optical properties; electrical properties;
D O I
10.1016/S0040-6090(96)09385-6
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this work, optical and electrical properties have been correlated to the degree of crystallization of silicon films deposited by sputtering in a pure H-2 plasma at various substrate temperatures, T-s. On increasing T-s from 50 degrees C to 250 degrees C, the average grain size is found to grow from about 5 nm to some tens of nanometers, with a concomitant decrease of the optical band gap from 2.40 eV to 1.95 eV. The detection of photoluminescence emission in the visible region for the lowest T-s seems to originate from the quantum confinement mechanism occurring in nanosized grains, whereas the conductivity increases by more than six orders of magnitude when T-s is increased from 50 degrees C to 250 degrees C. (C) 1997 Elsevier Science S.A.
引用
收藏
页码:15 / 18
页数:4
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