Phosphine oxide modulator-ameliorated hole injection for blue perovskite light-emitting diodes
Despite the enormous developments in perovskite light-emitting diodes (PeLEDs) recently, obtaining efficient blue PeLEDs is still considered a critical challenge due to the non-radiative recombination and unbalanced charge injection caused by the unmatched carrier mobility and the deep hole-injectio...
| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Royal Society of Chemistry
2023
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| _version_ | 1826314617521963008 |
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| author | Fan, X Wang, Y Shen, X Yu, Z Jeong, WH Jang, JW Kim, YG Woo, S-J Ahn, H Choi, H Lee, T-W Park, SH Gao, F Lee, BR |
| author_facet | Fan, X Wang, Y Shen, X Yu, Z Jeong, WH Jang, JW Kim, YG Woo, S-J Ahn, H Choi, H Lee, T-W Park, SH Gao, F Lee, BR |
| author_sort | Fan, X |
| collection | OXFORD |
| description | Despite the enormous developments in perovskite light-emitting diodes (PeLEDs) recently, obtaining efficient blue PeLEDs is still considered a critical challenge due to the non-radiative recombination and unbalanced charge injection caused by the unmatched carrier mobility and the deep hole-injection barrier between the hole-transport layer (HTL) and the emissive layer (EML). Herein, we incorporate tris(4-trifluoromethylphenyl)phosphine oxide (TMFPPO), obtained through a facile oxidation synthesis process, into poly(9-vinylcarbazole) (PVK). TMFPPO incorporation modulated the energy level and hole mobility of the binary-blend HTLs to eliminate the hole-injection barrier and balance the charge injection within the EML. Consequently, the blue PeLEDs with blended HTL presented an external quantum efficiency (EQE) of 7.23% centred at 477 nm, which was much higher than the EQE of a PVK device (4.95%). Our results demonstrate that modulating the energy level and charge injection of the HTL in the device is a promising method for obtaining efficient blue PeLEDs. |
| first_indexed | 2024-03-07T08:18:54Z |
| format | Journal article |
| id | oxford-uuid:8f25242a-ec2e-4592-a77f-2f2ff51c8f1e |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-09-25T04:35:15Z |
| publishDate | 2023 |
| publisher | Royal Society of Chemistry |
| record_format | dspace |
| spelling | oxford-uuid:8f25242a-ec2e-4592-a77f-2f2ff51c8f1e2024-09-20T09:57:18ZPhosphine oxide modulator-ameliorated hole injection for blue perovskite light-emitting diodesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:8f25242a-ec2e-4592-a77f-2f2ff51c8f1eEnglishSymplectic ElementsRoyal Society of Chemistry2023Fan, XWang, YShen, XYu, ZJeong, WHJang, JWKim, YGWoo, S-JAhn, HChoi, HLee, T-WPark, SHGao, FLee, BRDespite the enormous developments in perovskite light-emitting diodes (PeLEDs) recently, obtaining efficient blue PeLEDs is still considered a critical challenge due to the non-radiative recombination and unbalanced charge injection caused by the unmatched carrier mobility and the deep hole-injection barrier between the hole-transport layer (HTL) and the emissive layer (EML). Herein, we incorporate tris(4-trifluoromethylphenyl)phosphine oxide (TMFPPO), obtained through a facile oxidation synthesis process, into poly(9-vinylcarbazole) (PVK). TMFPPO incorporation modulated the energy level and hole mobility of the binary-blend HTLs to eliminate the hole-injection barrier and balance the charge injection within the EML. Consequently, the blue PeLEDs with blended HTL presented an external quantum efficiency (EQE) of 7.23% centred at 477 nm, which was much higher than the EQE of a PVK device (4.95%). Our results demonstrate that modulating the energy level and charge injection of the HTL in the device is a promising method for obtaining efficient blue PeLEDs. |
| spellingShingle | Fan, X Wang, Y Shen, X Yu, Z Jeong, WH Jang, JW Kim, YG Woo, S-J Ahn, H Choi, H Lee, T-W Park, SH Gao, F Lee, BR Phosphine oxide modulator-ameliorated hole injection for blue perovskite light-emitting diodes |
| title | Phosphine oxide modulator-ameliorated hole injection for blue perovskite light-emitting diodes |
| title_full | Phosphine oxide modulator-ameliorated hole injection for blue perovskite light-emitting diodes |
| title_fullStr | Phosphine oxide modulator-ameliorated hole injection for blue perovskite light-emitting diodes |
| title_full_unstemmed | Phosphine oxide modulator-ameliorated hole injection for blue perovskite light-emitting diodes |
| title_short | Phosphine oxide modulator-ameliorated hole injection for blue perovskite light-emitting diodes |
| title_sort | phosphine oxide modulator ameliorated hole injection for blue perovskite light emitting diodes |
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