Semi-Transparent Organic Photovoltaic Cells with Dielectric/Metal/Dielectric Top Electrode: Influence of the Metal on Their Performances

oleh: Linda Cattin, Guy Louarn, Mustapha Morsli, Jean Christian Bernède

Format: Article
Diterbitkan: MDPI AG 2021-02-01

Deskripsi

In order to grow semi-transparent organic photovoltaic cells (OPVs), multilayer dielectric/metal/dielectric (D/M/D) structures are used as a transparent top electrode in inverted OPVs. Two different electrodes are probed, MoO<sub>3</sub>/Ag/MoO<sub>3</sub> and MoO<sub>3</sub>/Ag/Cu:Ag/ZnS. Both of them exhibit high transmission in visible and small sheet resistance. Semi-transparent inverted OPVs using these electrodes as the top anode are probed. The active organic layers consist in the SubPc/C<sub>60</sub> couple. The dependence of the OPV performances on the top electrode was investigated. The results show that far better results are achieved when the top anode MoO<sub>3</sub>/Ag/MoO<sub>3</sub> is used. The OPV efficiency obtained was only 20% smaller in comparison with the opaque OPV, but with a transparency of nearly 50% in a broad range of the visible light (400–600 nm). In the case of MoO<sub>3</sub>/Ag/Cu:Ag/ZnS top anode, the small efficiency obtained is due to the presence of some Cu diffusion in the MoO<sub>3</sub> layer, which degrades the contact anode/organic material.