Calcium Test - Different test methods for WVTR on barriers, with an emphasis on ultrabarriers, sources of errors/irreproducibility, limits, etc. - basically why it's hard to do it right - (PPT)

摘要

Many thin film PV technologies are sensitive to moisture requiring the use of packaging schemes that prevent or reduce moisture over a 25 y expected product lifetime. This is easily accomplished using a glass frontsheet, with an impermeable backsheet and polyisobutylene based edge seals. However, there is a desire to create modules with either a lightweight or flexible construction. This can be accomplished using a barrier film deposited on a flexible polymer substrate.