Classifying the Role of Surface Ligands on the Passivation and Stability of Cs<sub>2</sub>NaInCl<sub>6</sub> Double Perovskite Quantum Dots
Cs<sub>2</sub>NaInCl<sub>6</sub> double perovskites, which have excellent photoelectric conversion properties and are non-toxic and lead-free, have recently gained significant attention. In particular, double-perovskite quantum dots (QDs) are viewed as a promising material fo...
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MDPI AG
2024-02-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/14/4/376 |
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| author | Keita Tosa Chao Ding Shikai Chen Shuzi Hayase Qing Shen |
| author_facet | Keita Tosa Chao Ding Shikai Chen Shuzi Hayase Qing Shen |
| author_sort | Keita Tosa |
| collection | DOAJ |
| description | Cs<sub>2</sub>NaInCl<sub>6</sub> double perovskites, which have excellent photoelectric conversion properties and are non-toxic and lead-free, have recently gained significant attention. In particular, double-perovskite quantum dots (QDs) are viewed as a promising material for optoelectronic device applications. Ligands such as oleic acid (OA) and oleylamine (OAm) are essential for the synthesis of perovskite QDs, but their specific roles in double-perovskite QDs remain unclear. In this study, we have investigated the binding of OA and OAm to Cs<sub>2</sub>NaInCl<sub>6</sub> QDs through FTIR and NMR and their effects on the surface defect reduction and stability improvement for Cs<sub>2</sub>NaInCl<sub>6</sub> QDs. We found that only OAm was bound to the QD surfaces while OA was not. The OAm has a significant effect on the photoluminescence quantum yield (PLQY) improvement by passivating the QD surface defects. The stability of the QDs was also evaluated, and it was observed that OA played a significant role in the stability of the QDs. Our findings provide valuable insights into the roles of ligands in influencing the photophysical properties and stability of lead-free double-perovskite QDs. |
| first_indexed | 2024-03-07T22:19:02Z |
| format | Article |
| id | doaj.art-2722fb94c7b449d8ab59e7e325b18704 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-07T22:19:02Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-2722fb94c7b449d8ab59e7e325b187042024-02-23T15:29:31ZengMDPI AGNanomaterials2079-49912024-02-0114437610.3390/nano14040376Classifying the Role of Surface Ligands on the Passivation and Stability of Cs<sub>2</sub>NaInCl<sub>6</sub> Double Perovskite Quantum DotsKeita Tosa0Chao Ding1Shikai Chen2Shuzi Hayase3Qing Shen4Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, JapanInstitute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610065, ChinaFaculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, JapanFaculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, JapanFaculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, JapanCs<sub>2</sub>NaInCl<sub>6</sub> double perovskites, which have excellent photoelectric conversion properties and are non-toxic and lead-free, have recently gained significant attention. In particular, double-perovskite quantum dots (QDs) are viewed as a promising material for optoelectronic device applications. Ligands such as oleic acid (OA) and oleylamine (OAm) are essential for the synthesis of perovskite QDs, but their specific roles in double-perovskite QDs remain unclear. In this study, we have investigated the binding of OA and OAm to Cs<sub>2</sub>NaInCl<sub>6</sub> QDs through FTIR and NMR and their effects on the surface defect reduction and stability improvement for Cs<sub>2</sub>NaInCl<sub>6</sub> QDs. We found that only OAm was bound to the QD surfaces while OA was not. The OAm has a significant effect on the photoluminescence quantum yield (PLQY) improvement by passivating the QD surface defects. The stability of the QDs was also evaluated, and it was observed that OA played a significant role in the stability of the QDs. Our findings provide valuable insights into the roles of ligands in influencing the photophysical properties and stability of lead-free double-perovskite QDs.https://www.mdpi.com/2079-4991/14/4/376Cs<sub>2</sub>NaInCl<sub>6</sub>quantum dotsstabilityligandsoleylamineoleic acid |
| spellingShingle | Keita Tosa Chao Ding Shikai Chen Shuzi Hayase Qing Shen Classifying the Role of Surface Ligands on the Passivation and Stability of Cs<sub>2</sub>NaInCl<sub>6</sub> Double Perovskite Quantum Dots Nanomaterials Cs<sub>2</sub>NaInCl<sub>6</sub> quantum dots stability ligands oleylamine oleic acid |
| title | Classifying the Role of Surface Ligands on the Passivation and Stability of Cs<sub>2</sub>NaInCl<sub>6</sub> Double Perovskite Quantum Dots |
| title_full | Classifying the Role of Surface Ligands on the Passivation and Stability of Cs<sub>2</sub>NaInCl<sub>6</sub> Double Perovskite Quantum Dots |
| title_fullStr | Classifying the Role of Surface Ligands on the Passivation and Stability of Cs<sub>2</sub>NaInCl<sub>6</sub> Double Perovskite Quantum Dots |
| title_full_unstemmed | Classifying the Role of Surface Ligands on the Passivation and Stability of Cs<sub>2</sub>NaInCl<sub>6</sub> Double Perovskite Quantum Dots |
| title_short | Classifying the Role of Surface Ligands on the Passivation and Stability of Cs<sub>2</sub>NaInCl<sub>6</sub> Double Perovskite Quantum Dots |
| title_sort | classifying the role of surface ligands on the passivation and stability of cs sub 2 sub naincl sub 6 sub double perovskite quantum dots |
| topic | Cs<sub>2</sub>NaInCl<sub>6</sub> quantum dots stability ligands oleylamine oleic acid |
| url | https://www.mdpi.com/2079-4991/14/4/376 |
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