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A Multifunctional Small-Molecule Hole-Transporting Material Enables Perovskite QLEDs with EQE Exceeding 20% AITranslate

Xiansheng Li; Mahdi Haghshenas; Linqin Wang; Jing Huang; Esmaeil Sheibani; Shichen Yuan; Xin Luo; Xuehan Chen; Changting Wei; Hengyang Xiang; Glib Baryshnikov; Licheng Sun; Haibo Zeng; Bo Xu;
Nanjing University of Science and Technology; University of Isfahan; Westlake University; Nanjing University of Science and Technology; University of Isfahan; Nanjing University of Science and Technology; Nanjing University of Science and Technology; Nanjing University of Science and Technology; Nanjing University of Science and Technology; Nanjing University of Science and Technology; Linköping University; Westlake University; Nanjing University of Science and Technology; Nanjing University of Science and Technology
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Abstract AITranslate

Hole-transporting materials (HTMs) play critical roles in the device performance and stability of perovskite quantum dot light-emitting diodes (Pe-QLEDs). However, the development of small-molecule HTMs for achieving high-performance Pe-QLEDs has proven to be very challenging because of their low hole mobility and poor solvent resistance. Herein, we tailor-made a multifunctional small-molecule HTM, termed X10, with methoxy as the substituents, for application in Pe-QLEDs. X10 features high hole mobility, good film-forming ability, and strong solvent resistance ability as well as defect passivation effect. Subsequently, Pe-QLEDs employing X10 as HTM presented a promising external quantum efficiency (EQE) of 20.18%, which is 7-fold higher than that of the reference HTM-TCTA-based ones (EQE ≈ 2.88%). To the best of our knowledge, this is the first case in which a small-molecule HTM displays a high EQE over 20% in Pe-QLEDs. Our work provides important guidance for the rational design of multifunctional small-molecule HTMs for high-performance Pe-QLEDs.

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DOI：https://doi.org/10.1021/acsenergylett.2c02938

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Citation Information:

Hole-transporting materials (HTMs) play critical roles in the device performance and stability of perovskite quantum dot light-emitting diodes (Pe-QLEDs). However, the development of small-molecule HTMs for achieving high-performance Pe-QLEDs has proven to be very challenging because of their low hole mobility and poor solvent resistance. Herein, we tailor-made a multifunctional small-molecule HTM, termed X10, with methoxy as the substituents, for application in Pe-QLEDs. X10 features high hole mobility, good film-forming ability, and strong solvent resistance ability as well as defect passivation effect. Subsequently, Pe-QLEDs employing X10 as HTM presented a promising external quantum efficiency (EQE) of 20.18%, which is 7-fold higher than that of the reference HTM-TCTA-based ones (EQE ≈ 2.88%). To the best of our knowledge, this is the first case in which a small-molecule HTM displays a high EQE over 20% in Pe-QLEDs. Our work provides important guidance for the rational design of multifunctional small-molecule HTMs for high-performance Pe-QLEDs.

quote

GB/T 7714-2015 [1] Xiansheng Li, Mahdi Haghshenas, Linqin Wang, et al. ACS Energy Letters, 2023(8). DOI:10.1021/acsenergylett.2c02938.
MLA [1] Xiansheng Li, et al., ACS Energy Letters, no. 8, 2023, https://doi.org/10.1021/acsenergylett.2c02938.
APA [1] Xiansheng Li, Mahdi Haghshenas, Linqin Wang, Jing Huang, Esmaeil Sheibani, Shichen Yuan, Xin Luo, Xuehan Chen, Changting Wei, Hengyang Xiang, Glib Baryshnikov, Licheng Sun, Haibo Zeng, & Bo Xu. (2023). ACS Energy Letters(8). https://doi.org/10.1021/acsenergylett.2c02938
IEEE [1] Xiansheng Li, Mahdi Haghshenas, Linqin Wang, Jing Huang, Esmaeil Sheibani, Shichen Yuan, Xin Luo, Xuehan Chen, Changting Wei, Hengyang Xiang, Glib Baryshnikov, Licheng Sun, Haibo Zeng, and Bo Xu, ACS Energy Letters, no. 8, 2023, doi: 10.1021/acsenergylett.2c02938.