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Proceedings Article

Efficient, deep-blue TADF-emitters for OLED display applications (Conference Presentation)

[+] Author Affiliations
Daniel Volz, Thomas Baumann

cynora GmbH (Germany)

Proc. SPIE 9941, Organic Light Emitting Materials and Devices XX, 994102 (November 3, 2016); doi:10.1117/12.2234624
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From Conference Volume 9941

  • Organic Light Emitting Materials and Devices XX
  • Franky So; Chihaya Adachi; Jang-Joo Kim
  • San Diego, California, United States | August 28, 2016

abstract

Currently, the mobile display market is strongly shifting towards AMOLED technology, in order to enable curved and flexible displays. This leads to a growing demand for highly efficient OLED emitters to reduce the power consumption and increase display resolution at the same time. While highly efficient green and red OLEDs already found their place in commercial OLED-displays, the lack of efficient blue emitters is still an issue. Consequently, the active area for blue is considerably larger than for green and red pixels, to make up for the lower efficiency. We intend to close this efficiency-gap with novel emitters based on thermally activated delayed fluorescence (TADF) technology. Compared to state-of-the-art fluorescent dopants, the efficiency of TADF-emitters is up to four times higher. At the same time, it is possible to design them in a way to maintain deep blue emission, i.e. CIE y < 0.2. These aspects are relevant to produce efficient high resolution AMOLED displays. Apart from these direct customer benefits, our TADF technology does not contain any rare elements, which allows for the fabrication of sustainable OLED technology. In this work, we highlight one of our recently developed blue TADF materials. Basic material properties as well as first device results are discussed. In a bottom-emitting device, a CIEx/CIEy coordinate of (0.16/0.17) was achieved with efficiency values close to 20% EQE. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Daniel Volz and Thomas Baumann
" Efficient, deep-blue TADF-emitters for OLED display applications (Conference Presentation) ", Proc. SPIE 9941, Organic Light Emitting Materials and Devices XX, 994102 (November 3, 2016); doi:10.1117/12.2234624; http://dx.doi.org/10.1117/12.2234624


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