The compact and thin TiO 2 blocking layers (c-TiO 2) were formed on F-doped SnO 2 (FTO) substrate in quantum dots-sensitized solar cells (QSSCs) by chemical deposition. The c-TiO 2 layers induced indirect contact between electrolyte and FTO electrode, which reduced leakage in QSSCs. The QSSCs showed power conversion efficiency (Eff) of 3.85% in the presence of c-TiO 2 layers which leads to 21% improved compared to that without c-TiO 2 layers (Eff = 3.18%). The presence of the c-TiO 2 layers in QSSCs also improved the stability under illumination.
- Blocking layer
- Quantum dots-sensitized solar cell