New high optical band gap window p layer contact development

We developed new hydrogenated boron doped amorphous silicon oxide window p layer for thin film solar device on the commercial SnO
₂
:F TCO. With improved optical band gap (OBG), low refraction index and low defect density, the tandem junction top cell blue response is improved as well as the overall current. Devices with the optimized film have shown higher efficiency comparing with the baseline process.