Gel Permeation Chromatography Purification Process for Highly Efficient Perovskite Nanocrystal Light-Emitting Devices
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- Ebe Hinako
- Graduate School of Organic Materials Science, Yamagata University
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- Chiba Takayuki
- Graduate School of Organic Materials Science, Yamagata University
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- Ohisa Satoru
- Graduate School of Organic Materials Science, Yamagata University
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- Kido Junji
- Graduate School of Organic Materials Science, Yamagata University
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<p>Metal halide perovskite nanocrystals (PeNCs) have ionic crystal structures, and their optical properties are greatly affected by polar solvents owing to the formation of cation- and anion-defects. Herein, we fabricated low driving voltage and high efficiency NC light emitting devices (LEDs) using gel permeation chromatography (GPC) with nonpolar solvents to remove impurities such as excess ligands and reaction solvents. We confirmed that these impurities may be removed completely via the one-cycle GPC purification process in contrast to the conventional reprecipitation purification process having two-cycles. In addition, we demonstrated the effect of interfacial engineering between the hole transport layer and PeNC layer using alkyl ammonium salts containing Br anion, i.e., oleylamine bromide (OAm-Br), to passivate both cation- and anion-defects in PeNCs. The LEDs based on PeNCs with GPC purification achieved the maximum external quantum efficiency of 4.3% with OAm-Br layer.</p>
収録刊行物
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- Journal of Photopolymer Science and Technology
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Journal of Photopolymer Science and Technology 33 (4), 393-397, 2020-07-01
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詳細情報 詳細情報について
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- CRID
- 1390848250124829312
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- NII論文ID
- 130007867649
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- NII書誌ID
- AA11576862
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- ISSN
- 13496336
- 09149244
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- NDL書誌ID
- 030413294
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- KAKEN
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- 使用不可