Magnesium oxide formed by a reaction of thermally-deposited magnesium with molybdenum oxide as a cathode buffer layer material for semi-transparent organic solar cells using gold as a cathode metal

Abstract

Incorporation of a magnesium oxide (MgO) cathode buffer layer fabricated by a reaction of thermally-deposited magnesium with molybdenum oxide in semi-transparent vacuum-processed Schottky and solution-processed bulk heterojunction OSCs using gold as a cathode metal reduces the series resistance and reverse bias current density, thus preventing the reduction of the open-circuit voltages and fill factors. It is speculated that the high hole-blocking ability of MgO which possesses the deep-lying conduction band level is responsible for these results.

Keywords:

• cathode buffer material
• magnesium
• magnesium oxide
• molybdenum oxide
• semi-transparent organic solar cell