Light-soaking free organic photovoltaic devices with sol-gel deposited ZnO and AZO electron transport layers.

ABSTRACT: This paper investigates light-soaking effects in inverted organic photovoltaic (OPV) devices with zinc oxide (ZnO) and aluminum doped ZnO (AZO) electron transport layers (ETL), which is important for the development of low-cost and stable solar cells. The samples demonstrated high solar harvesting properties with power conversion efficiency up to 3.9%. Air-stability tests of up to 150 days were performed on devices with different Al doping levels. The devices maintained higher than 60% of the initial PCE after 50 days of open-air exposure. The light-soaking mechanism was investigated with experiments and simulations and shown to be eliminated when the Al fraction of the AZO is higher than 4%. The simulated band diagram of the OPV devices indicates that the low carrier density in the ZnO la

SUBMITTER: Jiang Z 

PROVIDER: S-EPMC9088863 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature