Reduced Energetic Disorders in Dion–Jacobson Perovskites for Efficient and Spectral Stable Blue LEDs
Abstract
Metal halide perovskites have witnessed great success in green, red, and near-infrared light-emitting diodes (LEDs), yet blue LEDs still lag behind. Reducing undesired energetic disorders – broad n-phases and halide segregation – is considered as the most critical strategy to further improve the performances. Here, the study reports a newly designed and synthesized di-ammonium ligand with rigid π-conjugated rings and additional methyl groups to construct Dion–Jacobson (DJ) structure. Augmented coordination from the extra ammonium site and increased effective bulkiness from methyl groups lead to better distribution control over conventional mono-ammonium ligands. This enhances the radiative recombination of blue emissions in the film with homogeneous energy landscape and improved surface morphology, as evidenced by a series of imaging and mapping techniques. As a result, it demonstrates DJ perovskite LEDs (PeLEDs) with peak external quantum efficiencies of ≈4% at 484 nm and ≈11% at 494 nm, which are among the top reported for pure DJ phase-based PeLEDs in the corresponding wavelength regions. The results deepen the understanding of regulating energetic disorders in perovskite materials via molecular engineering.
- Authors:
-
[1];
[1]
- Purdue University, West Lafayette, IN (United States)
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- City University of New York (CUNY), NY (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); National Science Foundation (NSF)
- OSTI Identifier:
- 1995499
- Grant/Contract Number:
- AC02-05CH11231; 2131608-ECCS; 2143568-DMR; DMR-2004683
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Optical Materials
- Additional Journal Information:
- Journal Volume: 11; Journal Issue: 24; Journal ID: ISSN 2195-1071
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Blue LEDs; Dion–jacobson phase; Di-ammonium ligands; Energetic disorders; Molecular engineering
Citation Formats
Seo, Jisung, Wang, Kang, Coffey, Aidan H., He, Guiying, Yang, Hanjun, Lee, Yoon Ho, Ma, Ke, Sun, Jiaonan, Park, Jee Yung, Zhao, Han, Yuan, Chongli, Zhu, Chenhui, Sfeir, Matthew Y., and Dou, Letian. Reduced Energetic Disorders in Dion–Jacobson Perovskites for Efficient and Spectral Stable Blue LEDs. United States: N. p., 2023.
Web. doi:10.1002/adom.202301164.
Seo, Jisung, Wang, Kang, Coffey, Aidan H., He, Guiying, Yang, Hanjun, Lee, Yoon Ho, Ma, Ke, Sun, Jiaonan, Park, Jee Yung, Zhao, Han, Yuan, Chongli, Zhu, Chenhui, Sfeir, Matthew Y., & Dou, Letian. Reduced Energetic Disorders in Dion–Jacobson Perovskites for Efficient and Spectral Stable Blue LEDs. United States. https://doi.org/10.1002/adom.202301164
Seo, Jisung, Wang, Kang, Coffey, Aidan H., He, Guiying, Yang, Hanjun, Lee, Yoon Ho, Ma, Ke, Sun, Jiaonan, Park, Jee Yung, Zhao, Han, Yuan, Chongli, Zhu, Chenhui, Sfeir, Matthew Y., and Dou, Letian. Mon .
"Reduced Energetic Disorders in Dion–Jacobson Perovskites for Efficient and Spectral Stable Blue LEDs". United States. https://doi.org/10.1002/adom.202301164. https://www.osti.gov/servlets/purl/1995499.
@article{osti_1995499,
title = {Reduced Energetic Disorders in Dion–Jacobson Perovskites for Efficient and Spectral Stable Blue LEDs},
author = {Seo, Jisung and Wang, Kang and Coffey, Aidan H. and He, Guiying and Yang, Hanjun and Lee, Yoon Ho and Ma, Ke and Sun, Jiaonan and Park, Jee Yung and Zhao, Han and Yuan, Chongli and Zhu, Chenhui and Sfeir, Matthew Y. and Dou, Letian},
abstractNote = {Metal halide perovskites have witnessed great success in green, red, and near-infrared light-emitting diodes (LEDs), yet blue LEDs still lag behind. Reducing undesired energetic disorders – broad n-phases and halide segregation – is considered as the most critical strategy to further improve the performances. Here, the study reports a newly designed and synthesized di-ammonium ligand with rigid π-conjugated rings and additional methyl groups to construct Dion–Jacobson (DJ) structure. Augmented coordination from the extra ammonium site and increased effective bulkiness from methyl groups lead to better distribution control over conventional mono-ammonium ligands. This enhances the radiative recombination of blue emissions in the film with homogeneous energy landscape and improved surface morphology, as evidenced by a series of imaging and mapping techniques. As a result, it demonstrates DJ perovskite LEDs (PeLEDs) with peak external quantum efficiencies of ≈4% at 484 nm and ≈11% at 494 nm, which are among the top reported for pure DJ phase-based PeLEDs in the corresponding wavelength regions. The results deepen the understanding of regulating energetic disorders in perovskite materials via molecular engineering.},
doi = {10.1002/adom.202301164},
journal = {Advanced Optical Materials},
number = 24,
volume = 11,
place = {United States},
year = {Mon Jul 03 00:00:00 EDT 2023},
month = {Mon Jul 03 00:00:00 EDT 2023}
}
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