The role of the passivation film on photovoltaic panels

Which passivation layer is used in Silicon Photovoltaics?

Today's industrial silicon solar cells often utilize dielectric surface passivation layers such as SiN x and Al 2 O 3. However, a passivation layer well-known from the microelectronic industry, SiO 2, had and has a strong impact on silicon photovoltaics.

How does surface passivation affect a solar cell's performance?

The surface passivation of the perovskite layer has become one of the most critical methods to address these challenges. This review introduced defects and their influence on the cell's performance in different aspects (the carrier recombination, charge transfer, Voc, stability, and hysteresis of the solar cell).

Which surface passivation enables a solar cell to achieve efficiencies greater than 20%?

It is fair to say that the passivation of the surfaces of silicon solar cells was THE enabler for achieving efficiencies greater than 20%. The first and most natural choice for surface passivation is a thermally grown SiO 2.

Can defect passivation improve the power conversion efficiency of perovskite solar cells?

In recent years, the power conversion efficiency of perovskite solar cells has increased to reach over 20%. Finding an effective means of defect passivation is thought to be a promising route for bringing further increases in the power conversion efficiency and the open-circuit voltage (VOC) of perovskite solar cells.

How to introduce a passivation layer in perovskite solar cells?

To introduce a passivation layer, a PEAI salt solution was spin-coated onto the perovskite surface. It is noted that no additional process was carried out for PEAI layer. The device structure of the perovskite solar cells we adopted in this study is shown in Fig. 1a.

What are surface passivating thin films?

Surface passivating thin films are crucial for limiting the electrical losses during charge carrier collection in silicon photovoltaic devices. Certain dielectric coatings of more than 10 nm provide excellent surface passivation, and ultra-thin (<2 nm) dielectric layers can serve as interlayers in passivating contacts.