Improving the charge transport of perovskite nanocrystal light-emitting-diodes through Benzylammonium ligand exchange
Lead halide perovskite nanocrystals (LHP NCs) have emerged as promising materials for next-generation display area due to their exceptional luminescence efficiency, size-dependent band gap, and shape control. Ligands on the NC surfaces can be substituted using ligand exchange, which significantly in...
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Elsevier
2025-03-01
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| Series: | Applied Surface Science Advances |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666523925000078 |
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| author | Minsik Gong Dong Gyu Lee Gwang Yong Shin Yun Seop Shin Donghwan Yun Yunhye Jeong Sang Wook Park Chan Beom Park Yung Jin Yoon Sung Yong Bae Yun-Hi Kim Jin Young Kim Tae Kyung Lee Gi-Hwan Kim |
| author_facet | Minsik Gong Dong Gyu Lee Gwang Yong Shin Yun Seop Shin Donghwan Yun Yunhye Jeong Sang Wook Park Chan Beom Park Yung Jin Yoon Sung Yong Bae Yun-Hi Kim Jin Young Kim Tae Kyung Lee Gi-Hwan Kim |
| author_sort | Minsik Gong |
| collection | DOAJ |
| description | Lead halide perovskite nanocrystals (LHP NCs) have emerged as promising materials for next-generation display area due to their exceptional luminescence efficiency, size-dependent band gap, and shape control. Ligands on the NC surfaces can be substituted using ligand exchange, which significantly influence the properties and performance of LHP light-emitting diodes (LEDs). The alkyl chain in the surface ligands significantly affect external stimuli depending on their length. Additionally, aromatic ring-containing ligands improve conductivity of the film due to their conjugated structure. Herein, we introduced benzalkonium (BA) to synthesize CsPbBr3 NCs with high quality and explored ligand their optical and electrical properties. The result is that ligand exchange significantly impacts the LHP NCs' characteristics due to overlapped orbitals between the NC surface and π-bonds of the aromatic ring, enhancing charge injection and transport while reducing surface defects. We confirmed the successful anion exchange, which is bound to ammonium ion of BA and the stability of the LHP NCs through various analyses. The modified LHP NCs improved photoluminescence quantum yield and narrower full width at half maximum, indicating improved material purity. This study highlights the potential of ligand exchange to customize LHP NCs’ properties, paving the way for the development of high-efficiency blue LHP LEDs, and other advanced optoelectronic devices. As results, the LHP LEDs using these ligand-exchanged LHP NCs, achieving a notable increase maximum current efficiency (CEmax,) to 5.88 %, 19.5 cd A-1 at BA bromide, and 5.50 %, 16.6 cd A-1 at BA chloride, compared to devices using pristine LHP NCs, which achieved external quantum efficiency (EQE) 2.4 %, CEmax 7.8 cd A-1. |
| format | Article |
| id | doaj-art-62c4d16f039a4a10aa428bb95c3b41ef |
| institution | Kabale University |
| issn | 2666-5239 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Applied Surface Science Advances |
| spelling | doaj-art-62c4d16f039a4a10aa428bb95c3b41ef2025-01-27T04:22:18ZengElsevierApplied Surface Science Advances2666-52392025-03-0126100698Improving the charge transport of perovskite nanocrystal light-emitting-diodes through Benzylammonium ligand exchangeMinsik Gong0Dong Gyu Lee1Gwang Yong Shin2Yun Seop Shin3Donghwan Yun4Yunhye Jeong5Sang Wook Park6Chan Beom Park7Yung Jin Yoon8Sung Yong Bae9Yun-Hi Kim10Jin Young Kim11Tae Kyung Lee12Gi-Hwan Kim13Department of Materials Engineering and Convergence Technology, Gyeongsang National University, Jinju 52828, Korea, Republic of KoreaDepartment of Materials Engineering and Convergence Technology, Gyeongsang National University, Jinju 52828, Korea, Republic of KoreaDepartment of Materials Engineering and Convergence Technology, Gyeongsang National University, Jinju 52828, Korea, Republic of KoreaGraduate School of Carbon Neutrality, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, South KoreaDepartment of Materials Engineering and Convergence Technology, Gyeongsang National University, Jinju 52828, Korea, Republic of KoreaDepartment of Materials Engineering and Convergence Technology, Gyeongsang National University, Jinju 52828, Korea, Republic of KoreaDepartment of Materials Engineering and Convergence Technology, Gyeongsang National University, Jinju 52828, Korea, Republic of KoreaGraduate School of Carbon Neutrality, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, South KoreaGraduate School of Carbon Neutrality, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, South KoreaDepartment of Materials Engineering and Convergence Technology, Gyeongsang National University, Jinju 52828, Korea, Republic of KoreaDepartment of Chemistry and RIGET, Gyeongsang National University, Jinju 52828, Korea, Republic of Korea; Corresponding authors.Graduate School of Carbon Neutrality, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, South Korea; Corresponding authors.Department of Materials Engineering and Convergence Technology, Gyeongsang National University, Jinju 52828, Korea, Republic of Korea; Corresponding authors.Department of Materials Engineering and Convergence Technology, Gyeongsang National University, Jinju 52828, Korea, Republic of Korea; Corresponding authors.Lead halide perovskite nanocrystals (LHP NCs) have emerged as promising materials for next-generation display area due to their exceptional luminescence efficiency, size-dependent band gap, and shape control. Ligands on the NC surfaces can be substituted using ligand exchange, which significantly influence the properties and performance of LHP light-emitting diodes (LEDs). The alkyl chain in the surface ligands significantly affect external stimuli depending on their length. Additionally, aromatic ring-containing ligands improve conductivity of the film due to their conjugated structure. Herein, we introduced benzalkonium (BA) to synthesize CsPbBr3 NCs with high quality and explored ligand their optical and electrical properties. The result is that ligand exchange significantly impacts the LHP NCs' characteristics due to overlapped orbitals between the NC surface and π-bonds of the aromatic ring, enhancing charge injection and transport while reducing surface defects. We confirmed the successful anion exchange, which is bound to ammonium ion of BA and the stability of the LHP NCs through various analyses. The modified LHP NCs improved photoluminescence quantum yield and narrower full width at half maximum, indicating improved material purity. This study highlights the potential of ligand exchange to customize LHP NCs’ properties, paving the way for the development of high-efficiency blue LHP LEDs, and other advanced optoelectronic devices. As results, the LHP LEDs using these ligand-exchanged LHP NCs, achieving a notable increase maximum current efficiency (CEmax,) to 5.88 %, 19.5 cd A-1 at BA bromide, and 5.50 %, 16.6 cd A-1 at BA chloride, compared to devices using pristine LHP NCs, which achieved external quantum efficiency (EQE) 2.4 %, CEmax 7.8 cd A-1.http://www.sciencedirect.com/science/article/pii/S2666523925000078LEDsPerovskiteNanocrystalLigandBlueBenzylammonium ligands |
| spellingShingle | Minsik Gong Dong Gyu Lee Gwang Yong Shin Yun Seop Shin Donghwan Yun Yunhye Jeong Sang Wook Park Chan Beom Park Yung Jin Yoon Sung Yong Bae Yun-Hi Kim Jin Young Kim Tae Kyung Lee Gi-Hwan Kim Improving the charge transport of perovskite nanocrystal light-emitting-diodes through Benzylammonium ligand exchange Applied Surface Science Advances LEDs Perovskite Nanocrystal Ligand Blue Benzylammonium ligands |
| title | Improving the charge transport of perovskite nanocrystal light-emitting-diodes through Benzylammonium ligand exchange |
| title_full | Improving the charge transport of perovskite nanocrystal light-emitting-diodes through Benzylammonium ligand exchange |
| title_fullStr | Improving the charge transport of perovskite nanocrystal light-emitting-diodes through Benzylammonium ligand exchange |
| title_full_unstemmed | Improving the charge transport of perovskite nanocrystal light-emitting-diodes through Benzylammonium ligand exchange |
| title_short | Improving the charge transport of perovskite nanocrystal light-emitting-diodes through Benzylammonium ligand exchange |
| title_sort | improving the charge transport of perovskite nanocrystal light emitting diodes through benzylammonium ligand exchange |
| topic | LEDs Perovskite Nanocrystal Ligand Blue Benzylammonium ligands |
| url | http://www.sciencedirect.com/science/article/pii/S2666523925000078 |
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