Highly efficient processable molybdenum trioxide as a hole blocking interlayer for super-yellow organic light emitting diode
Aluminum compounds; Electron affinity; Fluorine compounds; Lithium Fluoride; Luminance; Nanobelts; Organic light emitting diodes (OLED); Sodium hydroxide; Transition metal oxides; Transition metals; Ultraviolet photoelectron spectroscopy; Efficiency enhancement; Energetic barriers; Hole blocking lay...
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2023
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my.uniten.dspace-226622023-05-29T14:11:31Z Highly efficient processable molybdenum trioxide as a hole blocking interlayer for super-yellow organic light emitting diode Talik N.A. Woon K.L. Yap B.K. Wong W.S. Whitcher T.J. Chanlek N. Nakajima H. Saisopa T. Songsiriritthigul P. 55576358000 12041961200 26649255900 57102399300 26641611700 24775167600 36562269300 55931748600 6603434551 Aluminum compounds; Electron affinity; Fluorine compounds; Lithium Fluoride; Luminance; Nanobelts; Organic light emitting diodes (OLED); Sodium hydroxide; Transition metal oxides; Transition metals; Ultraviolet photoelectron spectroscopy; Efficiency enhancement; Energetic barriers; Hole blocking layers; Luminance efficiency; Molybdenum trioxide; Optimal thickness; Poly(p-phenylenevinylene); Solution-processed; Molybdenum oxide By inserting lithium fluoride (LiF) between solution-processed MoO3 with optimal thickness on top of super yellow poly-(p-phenylenevinylene) (SY-PPV), the efficiency of the SY-PPV fluorescent-based devices can be significantly improved by more than two-fold. Despite the increased driving voltage, the device showed a current and a luminance efficiency up to 22.8 cd A-1 and 14.3 lm W-1 respectively, which is a more than a two-fold increase in efficiency compared to the control device using LiF/Al at a brightness of 1000 cdm-2. Ultraviolet photoelectron spectroscopy (UPS) is used to analyze the energy alignment between SY-PPV and the solution processed MoO3 and MoO3/LiF/Al interfaces. We found that the solution processed MoO3 using diluted sodium hydroxide has relatively low ionization energy (IA), electron affinity (EA) and work function decreasing with increasing thickness of MoO3. However, the optical bandgap increases with increasing spin-speed. A large energetic barrier is always present between the SY-PPY and deep lying valence band of MoO3. This is supported by suppression of hole current in hole dominating devices. The ability of thin MoO3 (?2 nm) acting as a hole blocking layer while allowing electrons to be transported across the layer and a large upward vacuum shift appeared to be the origin of efficiency enhancement of SY-PPV light-emitting diode when MoO3/LiF/Al is used. � 2016 IOP Publishing Ltd. Final 2023-05-29T06:11:31Z 2023-05-29T06:11:31Z 2016 Article 10.1088/0022-3727/49/39/395105 2-s2.0-84988916227 https://www.scopus.com/inward/record.uri?eid=2-s2.0-84988916227&doi=10.1088%2f0022-3727%2f49%2f39%2f395105&partnerID=40&md5=377c9a9f6a8e51e9f5932dc9ce0ca5ed https://irepository.uniten.edu.my/handle/123456789/22662 49 39 395105 Institute of Physics Publishing Scopus |
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Aluminum compounds; Electron affinity; Fluorine compounds; Lithium Fluoride; Luminance; Nanobelts; Organic light emitting diodes (OLED); Sodium hydroxide; Transition metal oxides; Transition metals; Ultraviolet photoelectron spectroscopy; Efficiency enhancement; Energetic barriers; Hole blocking layers; Luminance efficiency; Molybdenum trioxide; Optimal thickness; Poly(p-phenylenevinylene); Solution-processed; Molybdenum oxide |
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55576358000 |
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55576358000 Talik N.A. Woon K.L. Yap B.K. Wong W.S. Whitcher T.J. Chanlek N. Nakajima H. Saisopa T. Songsiriritthigul P. |
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Article |
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Talik N.A. Woon K.L. Yap B.K. Wong W.S. Whitcher T.J. Chanlek N. Nakajima H. Saisopa T. Songsiriritthigul P. |
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Talik N.A. Woon K.L. Yap B.K. Wong W.S. Whitcher T.J. Chanlek N. Nakajima H. Saisopa T. Songsiriritthigul P. Highly efficient processable molybdenum trioxide as a hole blocking interlayer for super-yellow organic light emitting diode |
| author_sort |
Talik N.A. |
| title |
Highly efficient processable molybdenum trioxide as a hole blocking interlayer for super-yellow organic light emitting diode |
| title_short |
Highly efficient processable molybdenum trioxide as a hole blocking interlayer for super-yellow organic light emitting diode |
| title_full |
Highly efficient processable molybdenum trioxide as a hole blocking interlayer for super-yellow organic light emitting diode |
| title_fullStr |
Highly efficient processable molybdenum trioxide as a hole blocking interlayer for super-yellow organic light emitting diode |
| title_full_unstemmed |
Highly efficient processable molybdenum trioxide as a hole blocking interlayer for super-yellow organic light emitting diode |
| title_sort |
highly efficient processable molybdenum trioxide as a hole blocking interlayer for super-yellow organic light emitting diode |
| publisher |
Institute of Physics Publishing |
| publishDate |
2023 |
| _version_ |
1806424496172695552 |
| score |
13.214268 |