Overcoming the Open-Circuit Voltage Losses in Narrow Bandgap Perovskites for All-Perovskite Tandem Solar Cells.

ABSTRACT: Narrow-bandgap (NBG) perovskite solar cells based on tin-lead mixed perovskite absorbers suffer from significant open-circuit voltage (V _OC) losses due primarily to a high defect density and charge carrier recombination at the device interfaces. In this study, the V _OC losses in NBG perovskite single junction cells (E _g = 1.21 eV) are addressed. The optimized NBG subcell is then used to fabricate highly efficient all-perovskite tandem solar cells (TSCs). The improvement in the V _OC is achieved via the addition of a thin poly(triarylamine) interlayer between the poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS)-based hole transport layer (HTL) and the NBG perovskite. The optimal bilayer HTL results in

SUBMITTER: Temitmie YA 

PROVIDER: S-EPMC11539106 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature