Transparent high-performance SiOxNy/SiOx barrier films for organic photovoltaic cells with high durability

Ju Won Lim, Chang Kyu Jin, Keun Yong Lim, Yun Jae Lee, Sung Ryong Kim, Byung Il Choi, Tae Whan Kim, Dong Ha Kim, Do Kyung Hwang, Won Kook Choi

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The science and technology of organic electronics have made consistent progress. However, the long-term stability of organic devices is a critical issue that remains to be resolved. Encapsulation is a straightforward and practical means to protect organic materials from oxygen or moisture and thus improve air stability. Here, we report a high-performance flexible inorganic SiNx/SiOxNy hybrid barrier film for application in organic solar cells (OSCs). This hybrid barrier film shows average transmittance of 85.5% and a water-vapor transmission rate of 7.1×10–5 g m−2 day−1. In OSCs comprising poly[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-bA]dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl] thieno[3,4-b]-thiophenediyl] (PTB7) and [6,6]-phenyl-C70-butyric acid methyl ester (PC70BM), which were encapsulated by the SiNx/SiOxNy hybrid barrier film, the power-conversion efficiency remained above 86% of the initial value even after 2000 h of storage in air, which is comparable to that obtained for a device encapsulated by a glass lid.

Original languageEnglish
Pages (from-to)12-20
Number of pages9
JournalNano Energy
Volume33
DOIs
StatePublished - 1 Mar 2017

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Ltd

Keywords

  • Barrier film
  • Long term stability
  • Organic solar cell

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