Researching | Improving reverse intersystem crossing of MR-TADF emitters for OLEDs

Journals >Journal of Semiconductors >Volume 43 >Issue 11 >Page 110202 > Article

Journal of Semiconductors
Vol. 43, Issue 11, 110202 (2022)

Improving reverse intersystem crossing of MR-TADF emitters for OLEDs

Xufeng Luo¹, Lixiu Zhang², Youxuan Zheng^1、*, and Liming Ding^2、**

Author Affiliations

¹State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China

²Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing 100190, China

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DOI: 10.1088/1674-4926/43/11/110202 Cite this Article

Xufeng Luo, Lixiu Zhang, Youxuan Zheng, Liming Ding. Improving reverse intersystem crossing of MR-TADF emitters for OLEDs[J]. Journal of Semiconductors, 2022, 43(11): 110202 Copy Citation Text

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References

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[2] Z Yang, Z Mao, Z Xie et al. Recent advances in organic thermally activated delayed fluorescence materials. Chem Soc Rev, 46, 915(2017).

[3] B Ren, C Zuo, Y Sun et al. Intramolecular spatial charge transfer enhances TADF efficiency. J Semicond, 42, 050201(2021).

[4] N Notsuka, H Nakanotani, H Noda et al. Observation of nonradiative deactivation behavior from singlet and triplet states of thermally activated delayed fluorescence emitters in solution. J Phys Chem Lett, 11, 562(2020).

[5] H Kaji, H Suzuki, T Fukushima et al. Purely organic electroluminescent material realizing 100% conversion from electricity to light. Nat Commun, 6, 8476(2015).

[6] T Hatakeyama, K Shiren, K Nakajima et al. Ultrapure blue thermally activated delayed fluorescence molecules: efficient HOMO-LUMO separation by the multiple resonance effect. Adv Mater, 28, 2777(2016).

[7] H Jung, S Kang, H Lee et al. High efficiency and long lifetime of a fluorescent blue-light emitter made of a pyrene core and optimized side groups. ACS Appl Mater Interfaces, 10, 30022(2018).

[8] M Yang, I S Park, T Yasuda. Full-color, narrowband, and high-efficiency electroluminescence from boron and carbazole embedded polycyclic heteroaromatics. J Am Chem Soc, 142, 19468(2020).

[9] Y Kondo, K Yoshiura, S Kitera et al. Narrowband deep-blue organic light-emitting diode featuring an organoboron-based emitter. Nat Photonics, 13, 678(2019).

[10] C Y Chan, M Tanaka, Y T Lee et al. Stable pure-blue hyperfluorescence organic light-emitting diodes with high-efficiency and narrow emission. Nat Photonics, 15, 203(2021).

[11] Y Zhang, D Zhang, J Wei et al. Achieving pure green electroluminescence with CIEy of 0.69 and EQE of 28.2% from an aza-fused multi-resonance emitter. Angew Chem Int Ed, 59, 17499(2020).

[12] T Huang, Q Wang, S Xiao et al. Simultaneously enhanced reverse intersystem crossing and radiative decay in thermally activated delayed fluorophors with multiple through-space charge transfers. Angew Chem Int Ed, 60, 23771(2021).

[13] J U Kim, I S Park, C Y Chan et al. Nanosecond-time-scale delayed fluorescence molecule for deep-blue OLEDs with small efficiency rolloff. Nat Commun, 11, 1765(2020).

[14] M Nagata, H Min, E Watanabe et al. Fused-nonacyclic multi-resonance delayed fluorescence emitter based on ladder-thiaborin exhibiting narrowband sky-blue emission with accelerated reverse intersystem crossing. Angew Chem Int Ed, 60, 20280(2021).

[15] F Liu, Z Cheng, Y Jiang et al. Highly efficient asymmetric multiple resonance thermally activated delayed fluorescence emitter with EQE of 32.8% and extremely low efficiency roll-off. Angew Chem Int Ed, 61, e202116927(2022).

[16] I S Park, H Min, T Yasuda. Ultrafast triplet-singlet exciton interconversion in narrowband blue organoboron emitters doped with heavy chalcogens. Angew Chem Int Ed, 61, e202205684(2022).

[17] X F Luo, H X Ni, H L Ma et al. Fused π-extended multiple-resonance induced thermally activated delayed fluorescence materials for high-efficiency and narrowband OLEDs with low efficiency roll-off. Adv Opt Mater, 10, 2102513(2022).

[18] X F Luo, S Q Song, H X Ni et al. Multiple-resonance-induced thermally activated delayed fluorescence materials based on indolo[3,2,1-jk]carbazole with an efficient and narrowband pure-green electroluminescence. Angew Chem Int Ed(2022).

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Xufeng Luo, Lixiu Zhang, Youxuan Zheng, Liming Ding. Improving reverse intersystem crossing of MR-TADF emitters for OLEDs[J]. Journal of Semiconductors, 2022, 43(11): 110202

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