Solution-Processed Efficient Blue Phosphorescent Organic Light-Emitting Diodes (PHOLEDs) Enabled by Hole-Transport Material Incorporated Single Emission Layer
Solution-processed blue phosphorescent organic light-emitting diodes (PHOLEDs) based on a single emission layer with small-molecule hole-transport materials (HTMs) are demonstrated. Various HTMs have been readily incorporated by solution-processing to enhance hole-transport properties of the polymer...
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| Format: | Article |
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MDPI AG
2021-01-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/3/554 |
| _version_ | 1797407876630708224 |
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| author | Taeshik Earmme |
| author_facet | Taeshik Earmme |
| author_sort | Taeshik Earmme |
| collection | DOAJ |
| description | Solution-processed blue phosphorescent organic light-emitting diodes (PHOLEDs) based on a single emission layer with small-molecule hole-transport materials (HTMs) are demonstrated. Various HTMs have been readily incorporated by solution-processing to enhance hole-transport properties of the polymer-based emission layer. Poly(<i>N</i>-vinylcarbazole) (PVK)-based blue emission layer with iridium(III) bis(4,6-(di-fluorophenyl)pyridinato-<i>N</i>,C2′)picolinate (FIrpic) triplet emitter blended with solution-processed 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC) gave luminous efficiency of 21.1 cd/A at a brightness of 6220 cd/m<sup>2</sup> with an external quantum efficiency (EQE) of 10.6%. Blue PHOLEDs with solution-incorporated HTMs turned out to be 50% more efficient compared to the reference device without HTMs. The high hole mobility, high triplet energy of HTM, and favorable energy transfer between HTM blended PVK host and FIrpic blue dopant were found to be important factors for achieving high device performance. The results are instructive to design and/or select proper hole-transport materials in solution-processed single emission layer. |
| first_indexed | 2024-03-09T03:49:04Z |
| format | Article |
| id | doaj.art-0483a04c8be141caaf655aaadf636c76 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T03:49:04Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-0483a04c8be141caaf655aaadf636c762023-12-03T14:29:44ZengMDPI AGMaterials1996-19442021-01-0114355410.3390/ma14030554Solution-Processed Efficient Blue Phosphorescent Organic Light-Emitting Diodes (PHOLEDs) Enabled by Hole-Transport Material Incorporated Single Emission LayerTaeshik Earmme0Department of Chemical Engineering, Hongik University, 94 Wausan-ro, Mapo-gu, Seoul 04066, KoreaSolution-processed blue phosphorescent organic light-emitting diodes (PHOLEDs) based on a single emission layer with small-molecule hole-transport materials (HTMs) are demonstrated. Various HTMs have been readily incorporated by solution-processing to enhance hole-transport properties of the polymer-based emission layer. Poly(<i>N</i>-vinylcarbazole) (PVK)-based blue emission layer with iridium(III) bis(4,6-(di-fluorophenyl)pyridinato-<i>N</i>,C2′)picolinate (FIrpic) triplet emitter blended with solution-processed 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC) gave luminous efficiency of 21.1 cd/A at a brightness of 6220 cd/m<sup>2</sup> with an external quantum efficiency (EQE) of 10.6%. Blue PHOLEDs with solution-incorporated HTMs turned out to be 50% more efficient compared to the reference device without HTMs. The high hole mobility, high triplet energy of HTM, and favorable energy transfer between HTM blended PVK host and FIrpic blue dopant were found to be important factors for achieving high device performance. The results are instructive to design and/or select proper hole-transport materials in solution-processed single emission layer.https://www.mdpi.com/1996-1944/14/3/554organic light-emitting diodes (OLEDs)solution-processinghole-transport materialsfluorescence resonance energy transfer (FRET) |
| spellingShingle | Taeshik Earmme Solution-Processed Efficient Blue Phosphorescent Organic Light-Emitting Diodes (PHOLEDs) Enabled by Hole-Transport Material Incorporated Single Emission Layer Materials organic light-emitting diodes (OLEDs) solution-processing hole-transport materials fluorescence resonance energy transfer (FRET) |
| title | Solution-Processed Efficient Blue Phosphorescent Organic Light-Emitting Diodes (PHOLEDs) Enabled by Hole-Transport Material Incorporated Single Emission Layer |
| title_full | Solution-Processed Efficient Blue Phosphorescent Organic Light-Emitting Diodes (PHOLEDs) Enabled by Hole-Transport Material Incorporated Single Emission Layer |
| title_fullStr | Solution-Processed Efficient Blue Phosphorescent Organic Light-Emitting Diodes (PHOLEDs) Enabled by Hole-Transport Material Incorporated Single Emission Layer |
| title_full_unstemmed | Solution-Processed Efficient Blue Phosphorescent Organic Light-Emitting Diodes (PHOLEDs) Enabled by Hole-Transport Material Incorporated Single Emission Layer |
| title_short | Solution-Processed Efficient Blue Phosphorescent Organic Light-Emitting Diodes (PHOLEDs) Enabled by Hole-Transport Material Incorporated Single Emission Layer |
| title_sort | solution processed efficient blue phosphorescent organic light emitting diodes pholeds enabled by hole transport material incorporated single emission layer |
| topic | organic light-emitting diodes (OLEDs) solution-processing hole-transport materials fluorescence resonance energy transfer (FRET) |
| url | https://www.mdpi.com/1996-1944/14/3/554 |
| work_keys_str_mv | AT taeshikearmme solutionprocessedefficientbluephosphorescentorganiclightemittingdiodespholedsenabledbyholetransportmaterialincorporatedsingleemissionlayer |