Enhancing the Stability of Perovskite Solar Cells with a Multilayer Thin-Film Barrier

Abstract

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/MgF 2 /Al 2 O 3 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 × 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 H 2 O/O 2 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 °C-85%RH damp heat test.

Enhanced formic acid electrolysis of Pd sites by improved OH adsorption assisted by MoP

“…To smoothly drive this reaction, Pd-based catalysts have been developed for FAEO, which showed much better selectivity for the direct oxidation pathway. 11,12 They were essential to achieve sustained and stable hydrogen production from formic acid electrolysis, while the catalyst poisoning by CO species in the indirect pathway is still a tricky issue. 13,14 Some studies have been carried out to overcome CO poisoning, by constructing ordered PdBi intermetallic compounds, isolating Pd sites and weakening the CO adsorption effect.…”

Electron Transfer Efficiency-Regulated Electrochemiluminescence for Rapid Crystallinity Analysis in Layered Materials

“…It is well-known that the lattice structure of metal/metal oxides becomes more ordered with the increased crystallinity, which facilitates the conduction of electrons within and between the lattices. 42 As a consequence, the enhanced crystallinity of CdAl-LDHs promotes electron transfer and improves the ECL signal.…”