Flexible Molybdenum Foil Substrate

Flexible molybdenum foil substrate
Flexible molybdenum foil substrate is lightweight and has stable physical and mechanical properties.

Currently, flexible metal substrates, such as aluminum foil and stainless steel, are not the best choices.

This is because the coefficient of thermal expansion is very high. However, these flexible metal substrates are relatively cheap.

Molybdenum foil has its advantages. For example, molybdenum foil has high mechanical and thermal stability. However, the disadvantage of molybdenum foil is that it requires the addition of an insulating layer between the metal substrate and the molybdenum back contact.

The function of the insulating layer is to prevent the diffusion of elements such as Fe. At the same time, the block also acts as thermal insulation.

It is worth noting that the molybdenum diffusion effect in molybdenum foil increases rapidly with increasing temperature. At higher temperatures, the impact of molybdenum diffusion on cell performance cannot be ignored, even with the addition of an insulating layer between the substrate and molybdenum back contact. Therefore, on the premise of ensuring film quality, reducing the temperature of the deposition process is still the focus.