Semitransparent inverted polymer solar cells using MoO3/Ag/V2O5 as transparent anodes

We demonstrate semitransparent inverted polymer solar cells with highly transparent anodes. The structure of the anode is molybdenum trioxide (MoO3)/silver (Ag)/vanadium pentoxide (V2O5). The inner MoO3 layer is introduced as a buffer layer to improve holes collection, while the outer V2O5 layer served as a light coupling layer to enhance optical transmittance of the photovoltaic device. The maximum transmittance of 90% from 400 nm to 700 nm is obtained when the thickness of V2O5 is 40 nm. When the thickness of V2O5 is 40 nm, under AM1.5G illumination of 100 mW/cm2 illuminated from ITO side (bottom), the Jsc is 5.01 mA/cm2, the Voc is 0.591 V, the FF is 61.8%, and the PCE is 1.83%; from MoO3/Ag/V2O5 side (top), the Jsc is 4.28 mA/cm2, the Voc is 0.585 V, the FF is 61.9%, and the PCE is 1.55%. The trend of the optical electric field distribution is highly consistent with the Jsc, which is dependent on the thickness of the V2O5 top capping layer.

Figure optionsDownload as PowerPoint slideHighlights
► Inner V2O5 was introduced as a buffer layer to improve holes collection.
► Outer V2O5 layer served as a light coupling layer to enhance optical transmittance.
► High transmission of 90% was achieved with a 40 nm outer V2O5 layer.
► Trend of the optical electric field distribution is consistent with Jsc, which is dependent on the thickness of V2O5.