Surface-binding molecular multipods strengthen the halide perovskite lattice and boost luminescence

Dong Hyeok Kim; Seung Je Woo; Claudia Pereyra Huelmo; Min Ho Park; Aaron M. Schankler; Zhenbang Dai; Jung Min Heo; Sungjin Kim; Guy Reuveni; Sungsu Kang; Joo Sung Kim; Hyung Joong Yun; Jinwoo Park; Jungwon Park; Omer Yaffe; Andrew M. Rappe; Tae Woo Lee

doi:10.1038/s41467-024-49751-7

Surface-binding molecular multipods strengthen the halide perovskite lattice and boost luminescence

Dong Hyeok Kim, Seung Je Woo, Claudia Pereyra Huelmo, Min Ho Park, Aaron M. Schankler, Zhenbang Dai, Jung Min Heo, Sungjin Kim, Guy Reuveni, Sungsu Kang, Joo Sung Kim, Hyung Joong Yun, Jinwoo Park, Jungwon Park, Omer Yaffe, Andrew M. Rappe, Tae Woo Lee

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

17 Scopus citations

Abstract

Reducing the size of perovskite crystals to confine excitons and passivating surface defects has fueled a significant advance in the luminescence efficiency of perovskite light-emitting diodes (LEDs). However, the persistent gap between the optical limit of electroluminescence efficiency and the photoluminescence efficiency of colloidal perovskite nanocrystals (PeNCs) suggests that defect passivation alone is not sufficient to achieve highly efficient colloidal PeNC-LEDs. Here, we present a materials approach to controlling the dynamic nature of the perovskite surface. Our experimental and theoretical studies reveal that conjugated molecular multipods (CMMs) adsorb onto the perovskite surface by multipodal hydrogen bonding and van der Waals interactions, strengthening the near-surface perovskite lattice and reducing ionic fluctuations which are related to nonradiative recombination. The CMM treatment strengthens the perovskite lattice and suppresses its dynamic disorder, resulting in a near-unity photoluminescence quantum yield of PeNC films and a high external quantum efficiency (26.1%) of PeNC-LED with pure green emission that matches the Rec.2020 color standard for next-generation vivid displays.

Original language	English
Article number	6245
Journal	Nature Communications
Volume	15
Issue number	1
DOIs	https://doi.org/10.1038/s41467-024-49751-7
State	Published - 24 Jul 2024
Externally published	Yes

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Publisher Copyright:
© The Author(s) 2024.

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Kim, D. H., Woo, S. J., Huelmo, C. P., Park, M. H., Schankler, A. M., Dai, Z., Heo, J. M., Kim, S., Reuveni, G., Kang, S., Kim, J. S., Yun, H. J., Park, J., Park, J., Yaffe, O., Rappe, A. M., & Lee, T. W. (2024). Surface-binding molecular multipods strengthen the halide perovskite lattice and boost luminescence. Nature Communications, 15(1), Article 6245. https://doi.org/10.1038/s41467-024-49751-7

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abstract = "Reducing the size of perovskite crystals to confine excitons and passivating surface defects has fueled a significant advance in the luminescence efficiency of perovskite light-emitting diodes (LEDs). However, the persistent gap between the optical limit of electroluminescence efficiency and the photoluminescence efficiency of colloidal perovskite nanocrystals (PeNCs) suggests that defect passivation alone is not sufficient to achieve highly efficient colloidal PeNC-LEDs. Here, we present a materials approach to controlling the dynamic nature of the perovskite surface. Our experimental and theoretical studies reveal that conjugated molecular multipods (CMMs) adsorb onto the perovskite surface by multipodal hydrogen bonding and van der Waals interactions, strengthening the near-surface perovskite lattice and reducing ionic fluctuations which are related to nonradiative recombination. The CMM treatment strengthens the perovskite lattice and suppresses its dynamic disorder, resulting in a near-unity photoluminescence quantum yield of PeNC films and a high external quantum efficiency (26.1\%) of PeNC-LED with pure green emission that matches the Rec.2020 color standard for next-generation vivid displays.",

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AU - Schankler, Aaron M.

AU - Dai, Zhenbang

AU - Heo, Jung Min

AU - Kim, Sungjin

AU - Reuveni, Guy

AU - Kang, Sungsu

AU - Kim, Joo Sung

AU - Yun, Hyung Joong

AU - Park, Jinwoo

AU - Park, Jungwon

AU - Yaffe, Omer

AU - Rappe, Andrew M.

AU - Lee, Tae Woo

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N2 - Reducing the size of perovskite crystals to confine excitons and passivating surface defects has fueled a significant advance in the luminescence efficiency of perovskite light-emitting diodes (LEDs). However, the persistent gap between the optical limit of electroluminescence efficiency and the photoluminescence efficiency of colloidal perovskite nanocrystals (PeNCs) suggests that defect passivation alone is not sufficient to achieve highly efficient colloidal PeNC-LEDs. Here, we present a materials approach to controlling the dynamic nature of the perovskite surface. Our experimental and theoretical studies reveal that conjugated molecular multipods (CMMs) adsorb onto the perovskite surface by multipodal hydrogen bonding and van der Waals interactions, strengthening the near-surface perovskite lattice and reducing ionic fluctuations which are related to nonradiative recombination. The CMM treatment strengthens the perovskite lattice and suppresses its dynamic disorder, resulting in a near-unity photoluminescence quantum yield of PeNC films and a high external quantum efficiency (26.1%) of PeNC-LED with pure green emission that matches the Rec.2020 color standard for next-generation vivid displays.

AB - Reducing the size of perovskite crystals to confine excitons and passivating surface defects has fueled a significant advance in the luminescence efficiency of perovskite light-emitting diodes (LEDs). However, the persistent gap between the optical limit of electroluminescence efficiency and the photoluminescence efficiency of colloidal perovskite nanocrystals (PeNCs) suggests that defect passivation alone is not sufficient to achieve highly efficient colloidal PeNC-LEDs. Here, we present a materials approach to controlling the dynamic nature of the perovskite surface. Our experimental and theoretical studies reveal that conjugated molecular multipods (CMMs) adsorb onto the perovskite surface by multipodal hydrogen bonding and van der Waals interactions, strengthening the near-surface perovskite lattice and reducing ionic fluctuations which are related to nonradiative recombination. The CMM treatment strengthens the perovskite lattice and suppresses its dynamic disorder, resulting in a near-unity photoluminescence quantum yield of PeNC films and a high external quantum efficiency (26.1%) of PeNC-LED with pure green emission that matches the Rec.2020 color standard for next-generation vivid displays.

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Surface-binding molecular multipods strengthen the halide perovskite lattice and boost luminescence

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