Planar perovskite solar cells with La2NiMnO6 buffer layer

Abstract

Thin films of La 2 NiMnO 6 (LNMO) double perovskite oxide were first used as buffer layers in planar perovskite solar cells (PSCs) with the architecture of glass/FTO/LNMO/CH 3 NH 3 PbI 3 /Spiro-MeOTAD/Au. All PSCs were fabricated under ambient conditions and their photovoltaic parameters were measured under standard illumination (AM1.5G, 1000 W/m 2 ). Power conversion efficiency (PCE) values (10 -11 %) for the PSCs developed were comparable with those obtained for conventional PSCs with compact TiO 2 (cTiO 2 ) layer, but the stability of PSCs with LNMO buffer layer was significantly higher than for cTiO 2 -based PSCs. KEYWORDS nanostructures, double perovskite oxides, perovskite solar cells, solar photovoltaics