1 They are used in rechargeable batteries
2 They are used as analytical sensors to detect pH, O2 ,NO2, SO2, NH3, glucose etc
3. They are used as antistatic materials in offices, theatres etc.
4. They are used as electro chromic materials
5. They are used in optical filters to absorb radiations from computer, T.V. screens.
6. They are used for photo diodes, light emitting wall papers, light emitting diodes &data storage.
7. They are used in construction of photo voltaic cell