期刊
ACS APPLIED ENERGY MATERIALS
卷 -, 期 -, 页码 -出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.2c03298
关键词
perovskite solar cells; decomposition; thinffilm encapsulation; stability; barrier
By developing a multilayer thin-film barrier with the architecture of parylene/MgF2/Al2O3, the long-term stability of perovskite solar cells (PSCs) can be greatly improved, leading to enhanced light and thermal stability of perovskite films and operational stability of PSCs.
The long-term stability of perovskite solar cells (PSCs) remains a big challenge for the commercialization of this emerging photovoltaic technique. The protection of PSCs with a robust barrier/ encapsulation could largely extend their life span. Here, we develop a multilayer thin-film barrier with the architecture of parylene/MgF2/Al2O3 as thin-film encapsulation for PSCs. The water vapor transmission rate of the multiple thin-film barriers can reach a very low value of 1 x 10-4 g m-2 d-1, comparable to that of the thin-film encapsulation in electronic packaging, making the multilayer thin-film barrier robust to block the ingress of H2O/O2 and outward leakage of perovskite decomposition byproducts. As a result, the light and thermal stability of perovskite films and the operational stability of PSCs are effectively improved with multiple thin-film barriers; especially, the encapsulated devices show negligible degradation after operation under the maximum power point tracking under 1sun illumination for 1000 h. In addition, the devices can retain 96% of their initial PCEs on average after aging for 100 h in an 85 degrees C-85%RH damp heat test.
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