EBIC results showed that clean GBs exhibited weak EBIC contrast at both 300 K and 100 K despite of the GB character, suggesting that recombination activity of clean GBs was weak.

• EBIC结果显示不同类型的洁净晶界在300 K和100 K下的都未呈现明显的EBIC衬度,说明洁净晶界的复合能力很弱。