图6. 不同固含量墨水打印制备的Ag2Se薄膜的SEM照片
Fig. 6. SEM images of Ag2Se films printed with different ink concentrations (a-b) 1.25 mg·mL-1; (c-d) 2.5 mg·mL-1; (e-f) 5 mg·mL-1