Colloidal Quantum Dot Light-Emitting Diodes Employing Phosphorescent Small Organic Molecules as Efficient Exciton Harvesters
Nonradiative energy transfer (NRET) is an alternative excitation mechanism in colloidal quantum dot (QD) based electroluminescent devices (QLEDs). Here, we develop hybrid highly spectrally pure QLEDs that facilitate energy transfer pumping via NRET from a phosphorescent small organic molecule-codope...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2016
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| Online Access: | https://hdl.handle.net/10356/81906 http://hdl.handle.net/10220/39744 |
| _version_ | 1826123620552802304 |
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| author | Mutlugun, Evren Guzelturk, Burak Abiyasa, Agus Putu Gao, Yuan Sun, Xiao Wei Demir, Hilmi Volkan |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Mutlugun, Evren Guzelturk, Burak Abiyasa, Agus Putu Gao, Yuan Sun, Xiao Wei Demir, Hilmi Volkan |
| author_sort | Mutlugun, Evren |
| collection | NTU |
| description | Nonradiative energy transfer (NRET) is an alternative excitation mechanism in colloidal quantum dot (QD) based electroluminescent devices (QLEDs). Here, we develop hybrid highly spectrally pure QLEDs that facilitate energy transfer pumping via NRET from a phosphorescent small organic molecule-codoped charge transport layer to the adjacent QDs. A partially codoped exciton funnelling electron transport layer is proposed and optimized for enhanced QLED performance while exhibiting very high color purity of 99%. These energy transfer pumped hybrid QLEDs demonstrate a 6-fold enhancement factor in the external quantum efficiency over the conventional QLED structure, in which energy transfer pumping is intrinsically weak. |
| first_indexed | 2024-10-01T06:07:21Z |
| format | Journal Article |
| id | ntu-10356/81906 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:07:21Z |
| publishDate | 2016 |
| record_format | dspace |
| spelling | ntu-10356/819062023-02-28T19:30:34Z Colloidal Quantum Dot Light-Emitting Diodes Employing Phosphorescent Small Organic Molecules as Efficient Exciton Harvesters Mutlugun, Evren Guzelturk, Burak Abiyasa, Agus Putu Gao, Yuan Sun, Xiao Wei Demir, Hilmi Volkan School of Electrical and Electronic Engineering School of Physical and Mathematical Sciences Hybrid light-emitting diodes Colloidal quantum dots Phosphorescent molecules Nonradiative energy transfer Triplet state harvesting Nonradiative energy transfer (NRET) is an alternative excitation mechanism in colloidal quantum dot (QD) based electroluminescent devices (QLEDs). Here, we develop hybrid highly spectrally pure QLEDs that facilitate energy transfer pumping via NRET from a phosphorescent small organic molecule-codoped charge transport layer to the adjacent QDs. A partially codoped exciton funnelling electron transport layer is proposed and optimized for enhanced QLED performance while exhibiting very high color purity of 99%. These energy transfer pumped hybrid QLEDs demonstrate a 6-fold enhancement factor in the external quantum efficiency over the conventional QLED structure, in which energy transfer pumping is intrinsically weak. NRF (Natl Research Foundation, S’pore) ASTAR (Agency for Sci., Tech. and Research, S’pore) Accepted version 2016-01-21T05:56:23Z 2019-12-06T14:42:47Z 2016-01-21T05:56:23Z 2019-12-06T14:42:47Z 2014 Journal Article Mutlugun, E., Guzelturk, B., Abiyasa, A. P., Gao, Y., Sun, X. W., & Demir, H. V. (2014). Colloidal Quantum Dot Light-Emitting Diodes Employing Phosphorescent Small Organic Molecules as Efficient Exciton Harvesters. The Journal of Physical Chemistry Letters, 5(16), 2802-2807. 1948-7185 https://hdl.handle.net/10356/81906 http://hdl.handle.net/10220/39744 10.1021/jz5012669 en The Journal of Physical Chemistry Letters © 2014 American Chemical Society. This is the author created version of a work that has been peer reviewed and accepted for publication by The Journal of Physical Chemistry Letters, American Chemical Society. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1021/jz5012669]. 20 p. application/pdf |
| spellingShingle | Hybrid light-emitting diodes Colloidal quantum dots Phosphorescent molecules Nonradiative energy transfer Triplet state harvesting Mutlugun, Evren Guzelturk, Burak Abiyasa, Agus Putu Gao, Yuan Sun, Xiao Wei Demir, Hilmi Volkan Colloidal Quantum Dot Light-Emitting Diodes Employing Phosphorescent Small Organic Molecules as Efficient Exciton Harvesters |
| title | Colloidal Quantum Dot Light-Emitting Diodes Employing Phosphorescent Small Organic Molecules as Efficient Exciton Harvesters |
| title_full | Colloidal Quantum Dot Light-Emitting Diodes Employing Phosphorescent Small Organic Molecules as Efficient Exciton Harvesters |
| title_fullStr | Colloidal Quantum Dot Light-Emitting Diodes Employing Phosphorescent Small Organic Molecules as Efficient Exciton Harvesters |
| title_full_unstemmed | Colloidal Quantum Dot Light-Emitting Diodes Employing Phosphorescent Small Organic Molecules as Efficient Exciton Harvesters |
| title_short | Colloidal Quantum Dot Light-Emitting Diodes Employing Phosphorescent Small Organic Molecules as Efficient Exciton Harvesters |
| title_sort | colloidal quantum dot light emitting diodes employing phosphorescent small organic molecules as efficient exciton harvesters |
| topic | Hybrid light-emitting diodes Colloidal quantum dots Phosphorescent molecules Nonradiative energy transfer Triplet state harvesting |
| url | https://hdl.handle.net/10356/81906 http://hdl.handle.net/10220/39744 |
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