Self-Organized Carbazole Phosphonic Acid Additives at Buried Interface Enhance Efficiency of Blue Perovskite LEDs

Guangruixing Zou; Zhaohua Zhu; Zixin Zeng; Zhiqiang Guan; Nan Zhang; Wenlin Jiang; Ziming Chen; Ye Wu; Desui Chen; Francis R. Lin; Sai-Wing Tsang; Chun-Sing Lee; Andrey L. Rogach; Alex K.-Y. Jen; Hin-Lap Yip

doi:10.1021/acsenergylett.4c01674

Self-Organized Carbazole Phosphonic Acid Additives at Buried Interface Enhance Efficiency of Blue Perovskite LEDs

Guangruixing Zou, Zhaohua Zhu, Zixin Zeng, Zhiqiang Guan, Nan Zhang, Wenlin Jiang, Ziming Chen, Ye Wu, Desui Chen, Francis R. Lin, Sai-Wing Tsang, Chun-Sing Lee, Andrey L. Rogach, Alex K.-Y. Jen, Hin-Lap Yip^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

9 Citations (Scopus)

Abstract

Carbazole phosphonic acids (CPAs) that are used in self-assembled monolayers (SAMs) are well-reported. Yet, an understanding of their broader application still needs to be fully established. In this work, we demonstrate that incorporating CPAs into blue quasi-2D perovskite precursors as additives is an effective strategy for fine-tuning phase distribution and enhancing the radiative characteristics of the resultant films. [2-(9H-Carbazol-9-yl)ethyl]phosphonic acid (2PACz) emerges as the most effective molecule for improving device performance. Significantly, when the perovskite film is deposited onto a hole injection structure of ITO/Mg_0.1Ni_0.9O_x/SAM/poly(9-vinylcarbazole) (PVK), 2PACz preferentially migrates to the PVK/perovskite interface. This phenomenon is driven by the strong interaction between the carbazole components of both PVK and 2PACz, leading to a stabilized interface. Coupled with the controlled phase distribution of the perovskite, this approach results in a marked increase in external quantum efficiency for blue perovskite LEDs, advancing from 11% to beyond 15%. These insights underscore the versatility of CPAs in the development of high-efficiency optoelectronic devices. © 2024 American Chemical Society.

Original language	English
Pages (from-to)	4715-4723
Journal	ACS Energy Letters
Volume	9
Issue number	9
Online published	3 Sept 2024
DOIs	https://doi.org/10.1021/acsenergylett.4c01674
Publication status	Published - 13 Sept 2024

Funding

We acknowledge financial support from the General Research Fund (No. 11314122 and No. 11309024) provided by the Research Grant Council of Hong Kong S.A.R. and from the Innovation and Technology Fund of Hong Kong S.A.R. (MHP/068/21).

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Zou, G., Zhu, Z., Zeng, Z., Guan, Z., Zhang, N., Jiang, W., Chen, Z., Wu, Y., Chen, D., Lin, F. R., Tsang, S.-W., Lee, C.-S., Rogach, A. L., Jen, A. K.-Y., & Yip, H.-L. (2024). Self-Organized Carbazole Phosphonic Acid Additives at Buried Interface Enhance Efficiency of Blue Perovskite LEDs. ACS Energy Letters, 9(9), 4715-4723. https://doi.org/10.1021/acsenergylett.4c01674

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title = "Self-Organized Carbazole Phosphonic Acid Additives at Buried Interface Enhance Efficiency of Blue Perovskite LEDs",

abstract = "Carbazole phosphonic acids (CPAs) that are used in self-assembled monolayers (SAMs) are well-reported. Yet, an understanding of their broader application still needs to be fully established. In this work, we demonstrate that incorporating CPAs into blue quasi-2D perovskite precursors as additives is an effective strategy for fine-tuning phase distribution and enhancing the radiative characteristics of the resultant films. [2-(9H-Carbazol-9-yl)ethyl]phosphonic acid (2PACz) emerges as the most effective molecule for improving device performance. Significantly, when the perovskite film is deposited onto a hole injection structure of ITO/Mg0.1Ni0.9Ox/SAM/poly(9-vinylcarbazole) (PVK), 2PACz preferentially migrates to the PVK/perovskite interface. This phenomenon is driven by the strong interaction between the carbazole components of both PVK and 2PACz, leading to a stabilized interface. Coupled with the controlled phase distribution of the perovskite, this approach results in a marked increase in external quantum efficiency for blue perovskite LEDs, advancing from 11% to beyond 15%. These insights underscore the versatility of CPAs in the development of high-efficiency optoelectronic devices. {\textcopyright} 2024 American Chemical Society.",

author = "Guangruixing Zou and Zhaohua Zhu and Zixin Zeng and Zhiqiang Guan and Nan Zhang and Wenlin Jiang and Ziming Chen and Ye Wu and Desui Chen and Lin, {Francis R.} and Sai-Wing Tsang and Chun-Sing Lee and Rogach, {Andrey L.} and Jen, {Alex K.-Y.} and Hin-Lap Yip",

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T1 - Self-Organized Carbazole Phosphonic Acid Additives at Buried Interface Enhance Efficiency of Blue Perovskite LEDs

AU - Zou, Guangruixing

AU - Zhu, Zhaohua

AU - Zeng, Zixin

AU - Guan, Zhiqiang

AU - Zhang, Nan

AU - Jiang, Wenlin

AU - Chen, Ziming

AU - Wu, Ye

AU - Chen, Desui

AU - Lin, Francis R.

AU - Tsang, Sai-Wing

AU - Lee, Chun-Sing

AU - Rogach, Andrey L.

AU - Jen, Alex K.-Y.

AU - Yip, Hin-Lap

PY - 2024/9/13

Y1 - 2024/9/13

N2 - Carbazole phosphonic acids (CPAs) that are used in self-assembled monolayers (SAMs) are well-reported. Yet, an understanding of their broader application still needs to be fully established. In this work, we demonstrate that incorporating CPAs into blue quasi-2D perovskite precursors as additives is an effective strategy for fine-tuning phase distribution and enhancing the radiative characteristics of the resultant films. [2-(9H-Carbazol-9-yl)ethyl]phosphonic acid (2PACz) emerges as the most effective molecule for improving device performance. Significantly, when the perovskite film is deposited onto a hole injection structure of ITO/Mg0.1Ni0.9Ox/SAM/poly(9-vinylcarbazole) (PVK), 2PACz preferentially migrates to the PVK/perovskite interface. This phenomenon is driven by the strong interaction between the carbazole components of both PVK and 2PACz, leading to a stabilized interface. Coupled with the controlled phase distribution of the perovskite, this approach results in a marked increase in external quantum efficiency for blue perovskite LEDs, advancing from 11% to beyond 15%. These insights underscore the versatility of CPAs in the development of high-efficiency optoelectronic devices. © 2024 American Chemical Society.

AB - Carbazole phosphonic acids (CPAs) that are used in self-assembled monolayers (SAMs) are well-reported. Yet, an understanding of their broader application still needs to be fully established. In this work, we demonstrate that incorporating CPAs into blue quasi-2D perovskite precursors as additives is an effective strategy for fine-tuning phase distribution and enhancing the radiative characteristics of the resultant films. [2-(9H-Carbazol-9-yl)ethyl]phosphonic acid (2PACz) emerges as the most effective molecule for improving device performance. Significantly, when the perovskite film is deposited onto a hole injection structure of ITO/Mg0.1Ni0.9Ox/SAM/poly(9-vinylcarbazole) (PVK), 2PACz preferentially migrates to the PVK/perovskite interface. This phenomenon is driven by the strong interaction between the carbazole components of both PVK and 2PACz, leading to a stabilized interface. Coupled with the controlled phase distribution of the perovskite, this approach results in a marked increase in external quantum efficiency for blue perovskite LEDs, advancing from 11% to beyond 15%. These insights underscore the versatility of CPAs in the development of high-efficiency optoelectronic devices. © 2024 American Chemical Society.

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U2 - 10.1021/acsenergylett.4c01674

DO - 10.1021/acsenergylett.4c01674

M3 - RGC 21 - Publication in refereed journal

SN - 2380-8195

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EP - 4723

JO - ACS Energy Letters

JF - ACS Energy Letters

IS - 9

ER -

Self-Organized Carbazole Phosphonic Acid Additives at Buried Interface Enhance Efficiency of Blue Perovskite LEDs

Abstract

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GRF: Enhancing Perovskite LEDs for Visible Light Communication through Molecular Interface Engineering

GRF: Optical and Device Architecture Engineering for High-Performance White Perovskite Light-emitting Devices

ITF: Core/shell Perovskite Quantum Dots with Excellent Stability and Their Application to Light-emitting Displays

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Self-Organized Carbazole Phosphonic Acid Additives at Buried Interface Enhance Efficiency of Blue Perovskite LEDs

Abstract

Funding

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Projects

GRF: Enhancing Perovskite LEDs for Visible Light Communication through Molecular Interface Engineering

GRF: Optical and Device Architecture Engineering for High-Performance White Perovskite Light-emitting Devices

ITF: Core/shell Perovskite Quantum Dots with Excellent Stability and Their Application to Light-emitting Displays

Cite this