Effects of ratio of hydrogen flow on microstructure of hydrogenated microcrystalline silicon films deposited by magnetron sputtering at 100 ℃

氢稀释比对磁控溅射低温(100℃)沉积氢化微晶硅薄膜微结构特性的影响（英文）

Hydrogenated microcrystalline silicon(μc-Si:H)films were prepared on glass and silicon substrates by radio frequency magnetron sputtering at 100°C using a mixture of argon(Ar)and hydrogen(H2)gasses as precursor gas.The effects of the ratio of hydrogen flow(H2/(Ar+H2)%)on the microstructure were evaluated.Results show that the microstructure,bonding structure,and surface morphology of theμc-Si:H films can be tailored based on the ratio of hydrogen flow.An amorphous to crystalline phase transition occurred when the ratio of hydrogen flow increased up to 50%.The crystallinity increased and tended to stabilize with the increase in ratio of hydrogen flow from 40%to 70%.The surface roughness of thin films increased,and total hydrogen content decreased as the ratio of hydrogen flow increased.Allμc-Si:H films have a preferred(111)orientation,independent of the ratio of hydrogen flow.And theμc-Si:H films had a dense structure,which shows their excellent resistance to post-oxidation.

在低温(100℃)条件下采用磁控溅射在玻璃和硅(100)衬底上沉积氢化微晶硅(μc-Si:H)薄膜,研究不同氢稀释比对微晶硅薄膜微结构特性的影响。结果表明:薄膜从非晶相过渡到了微晶相当氢稀释比增加到约50%,氢化微晶硅薄膜的结晶率随氢稀释比从40%增加到70%先增加后趋于稳定;薄膜的表面粗糙度随着氢稀释比的增加而增加,氢含量的变化趋势与之相反;所制备的氢化微晶硅薄膜都具有(111)择优取向,与氢稀释比无关,且薄膜结构致密。