반도체디스플레이기술학회지 (Journal of the Semiconductor & Display Technology)

한국반도체디스플레이기술학회 (The Korean Society Of Semiconductor & Display Technology)
권호 표지

열 활성 지연 형광(TADF) 재료의 특허 분석

The Patent Analysis of Thermally Activated Delayed Fluorescence Materials

  • 조대성 (아주대 공과대학 화학공학과) ;
  • 성민재 (아주대 공과대학 화학공학과) ;
  • 김민호 (아주대 공과대학 화학공학과) ;
  • 최승철 (아주대 대학원 에너지시스템공학과)
  • Jo, Dae Seong (Ajou University, College of Engineering, Dept. Chemical Engineering) ;
  • Sung, Min Jae (Ajou University, College of Engineering, Dept. Chemical Engineering) ;
  • Kim, Min Ho (Ajou University, College of Engineering, Dept. Chemical Engineering) ;
  • Choi, Seung Chul (Ajou University, Graduate School of Energy System)
  • 투고 : 2019.03.21
  • 심사 : 2019.03.25
  • 발행 : 2019.03.31
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초록

The TADF (Thermally Activated Delayed Fluorescence)-based OLED patents were analyzed and 4410 of patents were selected at the first step. And 975 patents were screened at second step. Finally, 39 key patents were selected. Patent qualitative analysis was performed in these patents to find which of the four property (lifetime, efficiency, color purity, driving voltage) of TADF was improved. Also, the variation of the hosts and dopants in patented TADF material were surveyed and their combination was analyzed. According to the analysis of the variation and the combination, some of TADF compounds were used as an assistant dopant to transfer energy. In addition, it tended to transfer energy by forming exciplex that shows TADF characteristics. These were similar to the mechanism of the introduced hyper fluorescence and could solve the inherent TADF problems. Finally, patent citation network was illustrated to visualize the patent citations and citations relationship of the major applicants in the current TADF-based OLED technology. The leading patent applicant organization was revealed as Idemitsu Kosan, Semiconductor Energy Laboratory, UDC, Princeton University, Merck and Nippon Steel & Sumikin Chemical, which had lots of reference patents 559, 524, 477, 310, 258, and 167, respectively.

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참고문헌

  1. T.H. Han at al., "Extremely efficient flexible organic light-emitting diodes with modified graphene anode," Nat. Photon., 6(2), pp. 105-110, (2012). https://doi.org/10.1038/nphoton.2011.318
  2. H. Yersin and R. Czerwieniec, "Organometallic emitters for OLEDs. Triplet harvesting, singlet harvesting, case studies, and trends," In W. Brutting and C. Adachi, Eds., Physics of Organic Semiconductors, Weinheim, Germany: Wiley-VCH, p. 371, (2012).
  3. B. Minaev, G. Baryshnikov, and H. Agren, "Principles of phosphorescent organic light emitting devices," Phys. Chem. Chem. Phys., 16(5), pp. 1719-1758, (2014). https://doi.org/10.1039/C3CP53806K
  4. C. Adachi, M.A. Baldo, M.E. Thompson, and S.R. Forrest, "Nearly 100% internal phosphorescence efficiency in an organic light-emitting device," J. Appl. Phys., 90(10), p. 5048, (2001). https://doi.org/10.1063/1.1409582
  5. Won Jae Lee, "Study on the Electrical Conduction Mechanism of Organic Light-Emitting Diodes (OLEDs)," Journal of the Semiconductor & Display Technology, 17(4), pp.6-11, (2018).
  6. K. Masui, H. Nakanotani and C. Adachi, "Analysis of exciton annihilation in high-efficiency sky-blue organic light-emitting diodes with thermally activated delayed fluorescence," Organic Electronics, 14(11), pp. 2721-2726, (2013). https://doi.org/10.1016/j.orgel.2013.07.010
  7. Sung Hyun Kim, Yoo Jin Lee, Ki Nam Byun, Sang Yun Jung, Bum Sung Lee, and Han Sung Yoo, "Characterization of High Efficient Red Phosphorescent OLEDs Fabricated on Flexible Substrates," Journal of the Semiconductor & Display Technology, 4(2), pp. 15-19, (2005).
  8. H. Uoyama, K. Goushi, K. Shizu, H. Nomura, and C. Adachi, "Highly efficient organic light-emitting diodes from delayed fluorescence," Nat., 492, pp. 234-238, (2012). https://doi.org/10.1038/nature11687
  9. B.D. Fernando, J.P. Thomas, and P.M. Andrew, "Photophysics of thermally activated delayed fluorescence molecules," Methods Appl. Fluoresc., 5(1), p. 012001, (2017). https://doi.org/10.1088/2050-6120/aa537e
  10. L. Bergmann, D.M. Zink, S. Brase, T. Baumann, and D. Volz, "Metal-organic and organic TADF-materials: status, challenges and characterization," Top. Curr. Chem., 374(3), p. 22, (2016). https://doi.org/10.1007/s41061-016-0022-6
  11. W. Li at al., "A twisting donor-acceptor molecule with an intercrossed excited state for highly efficient, deep-blue electroluminescence," Adv. Funct. Mater., 22(13), pp. 2797-2803, (2012). https://doi.org/10.1002/adfm.201200116
  12. S. Wang et al., "Achieving high power efficiency and low roll-off OLEDs based on energy transfer from thermally activated delayed excitons to fluorescent dopants," Chem. Commun., 51, pp. 11972-11975, (2015). https://doi.org/10.1039/C5CC04469C
  13. Ji Geun Chang, Sang Baie Shine, Jong Myoung Ahn, Ho Jung Chang, Hak Min Lee, Muoung Sum Gong, Min Young Kim, and Jun Woo Kim, "Characterization of Blue Organic Light Emitting Diodes using TPM-BiP," Journal of the Semiconductor & Display Technology, Vol. 6, No. 2, pp.11-14, (2007).
  14. Nakanotani, H. et al., "High-efficiency organic light-emitting diodes with fluorescent emitters," Nat. Commun., 5, p. 4016, (2014). https://doi.org/10.1038/ncomms5016
  15. Kyulux, "Our Technology: Hyper fluorescence emitter systems," https://www.kyulux.com/hyperfluorescence-emitter-systems, (2017).
  16. Wips on, https://www.wipson.com/service/mai/main.wips
  17. IDEMITSU KOSAN CO LTD, JP2016-115940 A.
  18. Semiconductor Energy Laboratory Co., Ltd, US2018-0145273 A1.
  19. C.-Y. Chan, L.-S. Cui, J.U. Kim, H. Nakanotani, and C. Adachi, "Rational Molecular Design for Deep-Blue Thermally Activated Delayed Fluorescence Emitters," Adv. Funct. Mater., 28(11), p. 1706023, (2018). https://doi.org/10.1002/adfm.201706023
  20. AIST, "Mystery of the Emission Mechanism of Materials for Next-Generation Organic Light-Emitting Diodes Unveiled!," https://www.aist.go.jp/ (2017).
  21. T. Hosokai at al., "Evidence and mechanism of efficient thermally activated delayed fluorescence promoted by delocalized excited states," Sci. Adv., 3(5), p. 1603282, (2017). https://doi.org/10.1126/sciadv.1603282