Energy and Charge Dual Transfer Engineering for High-Performance Green Perovskite Light-Emitting Diodes

Hee Ju An; Sung Doo Baek; Do Hoon Kim; Jae Min Myoung

doi:10.1002/adfm.202112849

Energy and Charge Dual Transfer Engineering for High-Performance Green Perovskite Light-Emitting Diodes

Hee Ju An, Sung Doo Baek, Do Hoon Kim, Jae Min Myoung

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Perovskite light-emitting diodes (PeLEDs) have garnered considerable interest in recent years owing to their unique optoelectronic properties. However, the performance of PeLEDs is limited by their low quantum efficiency and unbalanced charge injection. In this study, to address these issues, a novel co-hole transport layer (HTL) of 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP) and poly(9-vinylcarbazole) (PVK) is introduced into PeLEDs. By optimizing the composition ratio of CBP and PVK, the performance of CsPbBr₃-based PeLEDs is significantly improved via efficient Förster resonant energy transfer and an enhanced charge transfer owing to the well-aligned energy levels of the HTLs with the emission layers. The PeLED with an optimized composition ratio of the PVK_0.5–CBP_0.5 HTL exhibits the best device performance with a luminance of 31641 cd∙m⁻², current efficiency of 39.2 cd∙A⁻¹, and external quantum efficiency of 15.4%. Thus, the proposed strategy engineering dual transfer of energy and charge is expected to be revolutionary in the field of PeLED research.

Original language	English
Article number	2112849
Journal	Advanced Functional Materials
Volume	32
Issue number	21
DOIs	https://doi.org/10.1002/adfm.202112849
Publication status	Published - 2022 May 19

Bibliographical note

Funding Information:
H.J.A. and S.D.B. contributed equally to this work. This work was supported by the Samsung Research Funding Center of Samsung Electronics, under Project Number SRFC‐MA1901‐01.

Publisher Copyright:
© 2022 Wiley-VCH GmbH.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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10.1002/adfm.202112849

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title = "Energy and Charge Dual Transfer Engineering for High-Performance Green Perovskite Light-Emitting Diodes",

abstract = "Perovskite light-emitting diodes (PeLEDs) have garnered considerable interest in recent years owing to their unique optoelectronic properties. However, the performance of PeLEDs is limited by their low quantum efficiency and unbalanced charge injection. In this study, to address these issues, a novel co-hole transport layer (HTL) of 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP) and poly(9-vinylcarbazole) (PVK) is introduced into PeLEDs. By optimizing the composition ratio of CBP and PVK, the performance of CsPbBr3-based PeLEDs is significantly improved via efficient F{\"o}rster resonant energy transfer and an enhanced charge transfer owing to the well-aligned energy levels of the HTLs with the emission layers. The PeLED with an optimized composition ratio of the PVK0.5–CBP0.5 HTL exhibits the best device performance with a luminance of 31641 cd∙m−2, current efficiency of 39.2 cd∙A−1, and external quantum efficiency of 15.4%. Thus, the proposed strategy engineering dual transfer of energy and charge is expected to be revolutionary in the field of PeLED research.",

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note = "Funding Information: H.J.A. and S.D.B. contributed equally to this work. This work was supported by the Samsung Research Funding Center of Samsung Electronics, under Project Number SRFC‐MA1901‐01. Publisher Copyright: {\textcopyright} 2022 Wiley-VCH GmbH.",

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AU - Myoung, Jae Min

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Energy and Charge Dual Transfer Engineering for High-Performance Green Perovskite Light-Emitting Diodes

Abstract

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