Thin Film Encapsulation of Organic Solar Cells by Direct Deposition of Polysilazanes from Solution

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Channa I, Distler A, Zaiser M, Brabec C, Egelhaaf HJA
Zeitschrift: Advanced Energy Materials
Jahr der Veröffentlichung: 2019
Band: 9
Heftnummer: 26
ISSN: 1614-6832
eISSN: 1614-6840


Abstract

Organic electronic devices (OEDs), e.g., organic solar cells, degrade quickly in the presence of ambient gases, such as water vapor and oxygen. Thus, in order to extend the lifetime of flexible OEDs, they have to be protected by encapsulation. A solution-based encapsulation method is developed, which allows the direct deposition of the diffusion barrier on top of OEDs, thus avoiding lamination of barrier films. The method is based on the deposition of a perhydropolysilazane (PHPS) ink and its subsequent conversion into a silica layer by deep UV irradiation. The resulting barrier films show water vapor transmission rates (WVTRs) of <10(-2) g m(-2) d(-1) (40 degrees C/85% relative humidity (RH)) and oxygen transmission rates (OTRs) of <10(-2) cm(3) m(-2) d(-1) bar(-1) at ambient conditions. Flexibility of the resulting barrier films is improved by coating a barrier stack of several thin PHPS layers alternating with organic polymer interlayers. These stacks show an increase of WVTR values by less than 10% after 3000 bending cycles. Direct coating of the PHPS films on top of organic solar cells enhances the device lifetime in damp heat conditions from a few hours to beyond 300 h.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Brabec, Christoph Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Materialien der Elektronik und der Energietechnologie)
Channa, Iftikhar
Lehrstuhl für Werkstoffwissenschaften (Materialien der Elektronik und der Energietechnologie)
Egelhaaf, Hans-Joachim Albert
Lehrstuhl für Werkstoffwissenschaften (Materialien der Elektronik und der Energietechnologie)
Zaiser, Michael Prof. Dr.
Lehrstuhl für Werkstoffsimulation


Einrichtungen weiterer Autorinnen und Autoren

Bayerisches Zentrum für Angewandte Energieforschung e.V. (ZAE Bayern)


Zitierweisen

APA:
Channa, I., Distler, A., Zaiser, M., Brabec, C., & Egelhaaf, H.-J.A. (2019). Thin Film Encapsulation of Organic Solar Cells by Direct Deposition of Polysilazanes from Solution. Advanced Energy Materials, 9(26). https://dx.doi.org/10.1002/aenm.201900598

MLA:
Channa, Iftikhar, et al. "Thin Film Encapsulation of Organic Solar Cells by Direct Deposition of Polysilazanes from Solution." Advanced Energy Materials 9.26 (2019).

BibTeX: 

Zuletzt aktualisiert 2019-13-08 um 12:53