Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Efficient HOMO-LUMO separation by multiple resonance effect toward ultrapure blue thermally activated delayed fluorescence

[+] Author Affiliations
Takuji Hatakeyama, Kiichi Nakajima

Kwansei Gakuin Univ. (Japan)

Toshiaki Ikuta, Kazushi Shiren, Shintaro Nomura, Jingping Ni

JNC Petrochemical Corp. (Japan)

Proc. SPIE 9941, Organic Light Emitting Materials and Devices XX, 994103 (September 23, 2016); doi:10.1117/12.2239211
Text Size: A A A
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

Organic light-emitting diodes (OLEDs) play an important role in the new generation of flat-panel displays. Conventional OLEDs employing fluorescent materials together with triplet–triplet annihilation suffer from a relatively low internal quantum efficiency (IQE) of ~62.5%. On the other hand, the IQE of OLEDs employing phosphorescent or thermally activated delayed fluorescence (TADF) materials can reach ~100%. However, these materials exhibit very broad peaks with a full-width at half-maximum (FWHM) of 70–100 nm and cannot satisfy the color-purity requirements for displays. Therefore, the latest commercial OLED displays employ blue fluorescent materials with a relatively low IQE, and efficient blue emitters with a small FWHM are highly needed. In our manuscript, we present organic molecules that exhibit ultrapure blue fluorescence based on TADF. These molecules consist of three benzene rings connected by one boron and two nitrogen atoms, which establish a rigid polycyclic framework and significant localization of the highest occupied and lowest unoccupied molecular orbitals by a multiple resonance effect. An OLED device based on the new emitter exhibits ultrapure blue emission at 467 nm with an FWHM of 28 nm, Commission Internationale de l’Eclairage (CIE) coordinates of (0.12, 0.13), and an IQE of ~100%, which represent record-setting performance for blue OLED devices. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Takuji Hatakeyama ; Toshiaki Ikuta ; Kazushi Shiren ; Kiichi Nakajima ; Shintaro Nomura, et al.
" Efficient HOMO-LUMO separation by multiple resonance effect toward ultrapure blue thermally activated delayed fluorescence ", Proc. SPIE 9941, Organic Light Emitting Materials and Devices XX, 994103 (September 23, 2016); doi:10.1117/12.2239211; http://dx.doi.org/10.1117/12.2239211


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.