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

Autor: Kim DH; Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea., Woo SJ; Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea., Huelmo CP; Department of Chemistry, University of Pennsylvania, Philadelphia, PA, USA., Park MH; Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea., Schankler AM; Department of Chemistry, University of Pennsylvania, Philadelphia, PA, USA., Dai Z; Department of Chemistry, University of Pennsylvania, Philadelphia, PA, USA., Heo JM; Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea., Kim S; Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea., Reuveni G; Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, Israel., Kang S; School of Chemical and Biological Engineering, Seoul National University, Seoul, Republic of Korea., Kim JS; Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea., Yun HJ; Research Center for Materials Analysis, Korea Basic Science Institute (KBSI), Daejeon, Republic of Korea., Park J; Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea., Park J; School of Chemical and Biological Engineering, Seoul National University, Seoul, Republic of Korea.; Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, Republic of Korea., Yaffe O; Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, Israel., Rappe AM; Department of Chemistry, University of Pennsylvania, Philadelphia, PA, USA. rappe@sas.upenn.edu., Lee TW; Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea. twlees@snu.ac.kr.; Institute of Engineering Research, Research Institute of Advanced Materials, Soft Foundry, Seoul National University, Seoul, Republic of Korea. twlees@snu.ac.kr.; SN Display Co., Ltd., Seoul, Republic of Korea. twlees@snu.ac.kr.; Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, Republic of Korea. twlees@snu.ac.kr.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Jul 24; Vol. 15 (1), pp. 6245. Date of Electronic Publication: 2024 Jul 24.
DOI: 10.1038/s41467-024-49751-7
Abstrakt: 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.
(© 2024. The Author(s).)
Databáze: MEDLINE
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