Effective small organic molecule as a defect passivator for highly efficient quasi-2D perovskite light-emitting diodes
<p>The use of a small organic molecular passivator is proven to be a successful strategy for producing higher-performing quasi-2D perovskite light-emitting diodes (PeLEDs). The small organic molecule can passivate defects on the grain surround and surface of perovskite crystal structures, prev...
| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Wiley
2024
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| _version_ | 1824458767290335232 |
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| author | Li, Y Li, F Yu, Z Tamilavan, V Oh, C-M Jeong, WH Shen, X Lee, S Du, X Yang, E Ahn, Y Hwang, I-W Lee, BR Park, SH |
| author_facet | Li, Y Li, F Yu, Z Tamilavan, V Oh, C-M Jeong, WH Shen, X Lee, S Du, X Yang, E Ahn, Y Hwang, I-W Lee, BR Park, SH |
| author_sort | Li, Y |
| collection | OXFORD |
| description | <p>The use of a small organic molecular passivator is proven to be a successful strategy for producing higher-performing quasi-2D perovskite light-emitting diodes (PeLEDs). The small organic molecule can passivate defects on the grain surround and surface of perovskite crystal structures, preventing nonradiative recombination and charge trapping. In this study, a new small organic additive called 2, 8-dibromodibenzofuran (diBDF) is reported and examines its effectiveness as a passivating agent in high-performance green quasi-2D PeLEDs. The oxygen atom in diBDF, acting as a Lewis base, forms coordination bonds with uncoordinated Pb<sup>2+</sup>, so enhancing the performance of the device. In addition, the inclusion of diBDF in the quasi-2D perovskite results in a decrease in the abundance of low-n phases, hence facilitating efficient carrier mobility. Consequently, PeLED devices with high efficiency are successfully produced, exhibiting an external quantum efficiency of 19.9% at the emission wavelength of 517 nm and a peak current efficiency of 65.0 cd A-<sup>1</sup>.</p> |
| first_indexed | 2024-09-25T04:29:39Z |
| format | Journal article |
| id | oxford-uuid:1e55cf84-ee65-4d21-910c-a3bc1f5668af |
| institution | University of Oxford |
| language | English |
| last_indexed | 2025-02-19T04:31:07Z |
| publishDate | 2024 |
| publisher | Wiley |
| record_format | dspace |
| spelling | oxford-uuid:1e55cf84-ee65-4d21-910c-a3bc1f5668af2025-01-06T11:24:48ZEffective small organic molecule as a defect passivator for highly efficient quasi-2D perovskite light-emitting diodesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:1e55cf84-ee65-4d21-910c-a3bc1f5668afEnglishSymplectic ElementsWiley2024Li, YLi, FYu, ZTamilavan, VOh, C-MJeong, WHShen, XLee, SDu, XYang, EAhn, YHwang, I-WLee, BRPark, SH<p>The use of a small organic molecular passivator is proven to be a successful strategy for producing higher-performing quasi-2D perovskite light-emitting diodes (PeLEDs). The small organic molecule can passivate defects on the grain surround and surface of perovskite crystal structures, preventing nonradiative recombination and charge trapping. In this study, a new small organic additive called 2, 8-dibromodibenzofuran (diBDF) is reported and examines its effectiveness as a passivating agent in high-performance green quasi-2D PeLEDs. The oxygen atom in diBDF, acting as a Lewis base, forms coordination bonds with uncoordinated Pb<sup>2+</sup>, so enhancing the performance of the device. In addition, the inclusion of diBDF in the quasi-2D perovskite results in a decrease in the abundance of low-n phases, hence facilitating efficient carrier mobility. Consequently, PeLED devices with high efficiency are successfully produced, exhibiting an external quantum efficiency of 19.9% at the emission wavelength of 517 nm and a peak current efficiency of 65.0 cd A-<sup>1</sup>.</p> |
| spellingShingle | Li, Y Li, F Yu, Z Tamilavan, V Oh, C-M Jeong, WH Shen, X Lee, S Du, X Yang, E Ahn, Y Hwang, I-W Lee, BR Park, SH Effective small organic molecule as a defect passivator for highly efficient quasi-2D perovskite light-emitting diodes |
| title | Effective small organic molecule as a defect passivator for highly efficient quasi-2D perovskite light-emitting diodes |
| title_full | Effective small organic molecule as a defect passivator for highly efficient quasi-2D perovskite light-emitting diodes |
| title_fullStr | Effective small organic molecule as a defect passivator for highly efficient quasi-2D perovskite light-emitting diodes |
| title_full_unstemmed | Effective small organic molecule as a defect passivator for highly efficient quasi-2D perovskite light-emitting diodes |
| title_short | Effective small organic molecule as a defect passivator for highly efficient quasi-2D perovskite light-emitting diodes |
| title_sort | effective small organic molecule as a defect passivator for highly efficient quasi 2d perovskite light emitting diodes |
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