Role of Surface Coverage and Film Quality of the TiO₂ Electron Selective Layer for Optimal Hole-Blocking Properties.

ABSTRACT: Titanium dioxide (TiO₂) is a commonly used electron selective layer in thin-film solar cells. The energy levels of TiO₂ align well with those of most light-absorbing materials and facilitate extracting electrons while blocking the extraction of holes. In a device, this separates charge carriers and reduces recombination. In this study, we have evaluated the hole-blocking behavior of TiO₂ compact layers using charge extraction by linearly increasing voltage in a metal-insulator-semiconductor structure (MIS-CELIV). This hole-blocking property was characterized as surface recombination velocity (S _R) for holes at the interface between a semiconducting polymer and TiO₂ layer. TiO₂ layers of different thicknesses were prep

SUBMITTER: Qudsia S 

PROVIDER: S-EPMC9017100 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature