Co-evaporation of fluoropolymer additives for improved thermal stability of organic semiconductors

Jared S. Price, Baomin Wang, Alex J. Grede, Yufei Shen, Noel C. Giebink

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Reliability remains an ongoing challenge for organic light emitting diodes (OLEDs) as they expand in the marketplace. The ability to withstand operation and storage at elevated temperature is particularly important in this context, not only because of the inverse dependence of OLED lifetime on temperature, but also because high thermal stability is fundamentally important for high power/brightness operation as well as applications such as automotive lighting, where interior car temperatures often exceed the ambient by 50 °C or more. Here, we present a strategy to significantly increase the thermal stability of small molecule OLEDs by co-depositing an amorphous fluoropolymer, Teflon AF, to prevent catastrophic failure at elevated temperatures. Using this approach, we demonstrate that the thermal breakdown limit of common hole transport materials can be increased from typical temperatures of â1/4100 °C to more than 200 °C while simultaneously improving their electrical transport properties. Similar thermal stability enhancements are demonstrated in simple bilayer OLEDs. These results point toward a general approach to engineer morphologically-stable organic electronic devices that are capable of operating or being stored in extreme thermal environments.

Original languageEnglish (US)
Title of host publicationOrganic Light Emitting Materials and Devices XXI
EditorsFranky So, Chihaya Adachi, Jang-Joo Kim
PublisherSPIE
ISBN (Electronic)9781510611818
DOIs
StatePublished - Jan 1 2017
EventOrganic Light Emitting Materials and Devices XXI 2017 - San Diego, United States
Duration: Aug 6 2017Aug 8 2017

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10362
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherOrganic Light Emitting Materials and Devices XXI 2017
CountryUnited States
CitySan Diego
Period8/6/178/8/17

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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    Price, J. S., Wang, B., Grede, A. J., Shen, Y., & Giebink, N. C. (2017). Co-evaporation of fluoropolymer additives for improved thermal stability of organic semiconductors. In F. So, C. Adachi, & J-J. Kim (Eds.), Organic Light Emitting Materials and Devices XXI [103621Z] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10362). SPIE. https://doi.org/10.1117/12.2274152