Thermal management enables stable perovskite nanocrystal light-emitting diodes with novel hole transport material
The severely insufficient operational lifetime of perovskite light-emitting diodes (LEDs) is incompatible with the rapidly increasing external quantum efficiency, even as it approaches the theoretical limit, thereby significantly impeding the commercialization of perovskite LEDs. In addition, Joule...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Wiley
2023
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| _version_ | 1797112140159516672 |
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| author | Shen, X Kwak, SL Jeong, WH Jang, JW Yu, Z Ahn, H Park, HJ Choi, H Park, SH Snaith, HJ Hwang, D-H Lee, BR |
| author_facet | Shen, X Kwak, SL Jeong, WH Jang, JW Yu, Z Ahn, H Park, HJ Choi, H Park, SH Snaith, HJ Hwang, D-H Lee, BR |
| author_sort | Shen, X |
| collection | OXFORD |
| description | The severely insufficient operational lifetime of perovskite light-emitting diodes (LEDs) is incompatible with the rapidly increasing external quantum efficiency, even as it approaches the theoretical limit, thereby significantly impeding the commercialization of perovskite LEDs. In addition, Joule heating induces ion migration and surface defects, degrades the photoluminescence quantum yield and other optoelectronic properties of perovskite films, and induces the crystallization of charge transport layers with low glass transition temperatures, resulting in LED degradation under continuous operation. Here, a novel thermally crosslinked hole transport material, poly(FCA<sub>60</sub> -co-BFCA<sub>20</sub> -co-VFCA<sub>20</sub> ) (poly-FBV), with temperature-dependent hole mobility is designed, which is advantageous for balancing the charge injection of the LEDs and limiting the generation of Joule heating. The optimised CsPbI<sub>3</sub> perovskite nanocrystal LEDs with poly-FBV realise approximately a 2-fold external quantum efficiency increase over the LED with commercial hole transport layer poly(4-butyl-phenyl-diphenyl-amine) (poly-TPD), owing to the balanced carrier injection and suppressed exciton quenching. Moreover, because of the Joule heating control provided by the novel crosslinked hole transport material, the LED utilising crosslinked poly-FBV has a 150-fold longer operating lifetime (490 min) than that utilizing poly-TPD (3.3 min). The study opens a new avenue for the use of PNC LEDs in commercial semiconductor optoelectronic devices. |
| first_indexed | 2024-03-07T08:19:59Z |
| format | Journal article |
| id | oxford-uuid:4e91a6c5-2921-47d5-9a2a-aee36eb11068 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T08:19:59Z |
| publishDate | 2023 |
| publisher | Wiley |
| record_format | dspace |
| spelling | oxford-uuid:4e91a6c5-2921-47d5-9a2a-aee36eb110682024-01-24T09:28:34ZThermal management enables stable perovskite nanocrystal light-emitting diodes with novel hole transport materialJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:4e91a6c5-2921-47d5-9a2a-aee36eb11068EnglishSymplectic ElementsWiley2023Shen, XKwak, SLJeong, WHJang, JWYu, ZAhn, HPark, HJChoi, HPark, SHSnaith, HJHwang, D-HLee, BRThe severely insufficient operational lifetime of perovskite light-emitting diodes (LEDs) is incompatible with the rapidly increasing external quantum efficiency, even as it approaches the theoretical limit, thereby significantly impeding the commercialization of perovskite LEDs. In addition, Joule heating induces ion migration and surface defects, degrades the photoluminescence quantum yield and other optoelectronic properties of perovskite films, and induces the crystallization of charge transport layers with low glass transition temperatures, resulting in LED degradation under continuous operation. Here, a novel thermally crosslinked hole transport material, poly(FCA<sub>60</sub> -co-BFCA<sub>20</sub> -co-VFCA<sub>20</sub> ) (poly-FBV), with temperature-dependent hole mobility is designed, which is advantageous for balancing the charge injection of the LEDs and limiting the generation of Joule heating. The optimised CsPbI<sub>3</sub> perovskite nanocrystal LEDs with poly-FBV realise approximately a 2-fold external quantum efficiency increase over the LED with commercial hole transport layer poly(4-butyl-phenyl-diphenyl-amine) (poly-TPD), owing to the balanced carrier injection and suppressed exciton quenching. Moreover, because of the Joule heating control provided by the novel crosslinked hole transport material, the LED utilising crosslinked poly-FBV has a 150-fold longer operating lifetime (490 min) than that utilizing poly-TPD (3.3 min). The study opens a new avenue for the use of PNC LEDs in commercial semiconductor optoelectronic devices. |
| spellingShingle | Shen, X Kwak, SL Jeong, WH Jang, JW Yu, Z Ahn, H Park, HJ Choi, H Park, SH Snaith, HJ Hwang, D-H Lee, BR Thermal management enables stable perovskite nanocrystal light-emitting diodes with novel hole transport material |
| title | Thermal management enables stable perovskite nanocrystal light-emitting diodes with novel hole transport material |
| title_full | Thermal management enables stable perovskite nanocrystal light-emitting diodes with novel hole transport material |
| title_fullStr | Thermal management enables stable perovskite nanocrystal light-emitting diodes with novel hole transport material |
| title_full_unstemmed | Thermal management enables stable perovskite nanocrystal light-emitting diodes with novel hole transport material |
| title_short | Thermal management enables stable perovskite nanocrystal light-emitting diodes with novel hole transport material |
| title_sort | thermal management enables stable perovskite nanocrystal light emitting diodes with novel hole transport material |
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