Before revision: The Conductivity Modulation (The Transistor element) Additionally, in thin-film solar cells, buffer electron and hole semiconductor transport layers are introduced at the respective metal electrodes to avoid electron-hole recombination and to remove the metal/absorber Schottky barrier.
After revision: Additionally, in thin-film solar cells, buffer electron and hole semiconductor transport layers are introduced at the respective metal electrodes to avoid electron-hole recombination and to remove the metal/absorber Schottky barrier.