Table 3 Variation of RR/RF with E at different el-Conc.

From: Electric field created p–n junction in composite films made from carbon nanotubes, iron (III) sulfate and polyvinyl alcohol

el-Conc

RR/RF

0 V/cm

30 V/cm

600 V/cm

0.1 M

1.056

2.024

2.804

0.3 M

1.344

1.134

3.979

0.5 M

1.287

7.054

20.663

1 M

1.365

3.744

7.068

Hot pressed (0.3 M)

3.176

2.358

4.03