Semitransparent organic solar cells (ST-OSCs) hold immense
promise
across diverse applications such as seamlessly integrated building
photovoltaics, floating solar arrays, innovative agrivoltaic systems,
and stylish wearable electronics. These cells offer multifunctionality
with their unique blend of power generation, light permeability, and
customizable hues. Particularly, bifacial ST-OSCs emerge as a pivotal
solution capable of harnessing light from both front and rear surfaces.
Their ability to absorb light from both sides enhances the energy
efficiency, especially in environments with high reflective surfaces.
Moreover, these lightweight and flexible cells can be integrated into
unconventional locations, supporting innovative architectural designs
and portable energy solutions. In this article, an optically optimized
Sb2O3 layer featuring a high refractive index
and minimal optical loss in the visible to near-infrared region is
paired with the Ag film. This research delves into enhancing the performance
of bifacial ST-OSCs through the strategic incorporation of an optical
coupling layer on top of the Ag electrode. This ingenious addition
not only mitigates reflectance from the top electrode but also enhances
parameters such as average visible transmittance, color-rendering
index, and color correlated temperature and the overall bifaciality
of the device. These findings suggest that interfacial engineering
and optical coupling are effective strategies for developing high-performance
ST-OSCs that exhibit vibrant colors, excellent transparency, and high
efficiency.