Room-temperature and solution-processed vanadium oxide buffer layer for efficient charge injection in bottom-contact organic field-effect transistors

Jin, Seokgeun; Jung, Bernhard; Song, Chang Geun; Kwak, Jeonghun

doi:10.1016/j.cap.2014.10.019

Cited by 9 publications

(4 citation statements)

References 22 publications

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“…[182] Vanadium oxide-based layers, however, can be deposited in ambient air conditions at low temperatures. [183] For example, vanadium pentoxide (V 2 O 5 ) layers have been reported to result in high-quality thin films without the need for any post-treatment processes.…”

Section: O 5 In Oscsmentioning

confidence: 99%

Robust Inorganic Hole Transport Materials for Organic and Perovskite Solar Cells: Insights into Materials Electronic Properties and Device Performance

et al. 2020

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Figure 11. a) Energy-level diagram of MAPbI 3 PSCs using MoO 3 as a HTL. This leads to the creation of IS due to a chemical reaction between MoO 3 and perovskite. b) Incorporation of a thin organic HTL layer (Spiro-MeOTAD) inhibits such a chemical reaction. For each layer, the Fermi-level position (E F , dotted line), work function (in red), electron affinity, and ionization energy (in black) are indicated in eV. Reproduced with permission. [212]

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Section: O 5 In Oscsmentioning

confidence: 99%

Robust Inorganic Hole Transport Materials for Organic and Perovskite Solar Cells: Insights into Materials Electronic Properties and Device Performance

et al. 2020

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“…The reversible phase transition in vanadium oxide system triggers significant changes in thermo-optical and electrical properties. Since, unlike other vanadium oxide analogues VO 2 has its phase transition temperature much closer to room temperature it has potential applications in the fields of storage devices [6], switching devices [7], smart windows [8], field effect transistors [9] and antireflective smart coatings [10]. Further, it has been reported recently [10][11][12] that VO 2 based thin films could offer a smart, efficient and radiative thermal control characteristic for spacecraft application.…”

Section: Introductionmentioning

confidence: 99%

Reversible, repeatable and low phase transition behaviour of spin coated nanostructured vanadium oxide thin films with superior mechanical properties

Mukherjee

Dey

Akinlabi

et al. 2018

Ceramics International

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Smooth, uniform and crystalline vanadium oxide thin films were deposited on quartz by spin coating technique with four different rpm i.e., 1000, 2000, 3000 and 4000 and subsequently post annealed at 350, 450 and 550°C in vacuum. Transmission electron microscopy (TEM), Field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD) techniques were utilized for microstructural characterizations and phase analysis, respectively, for vanadium oxide powder and deposited film. Nanorods were observed to be grown after vacuum annealing. X-ray photoelectron spectroscopy (XPS) technique was utilized to study the elemental oxidation state of deposited vanadium oxide films. Thermo-optical and electrical properties such as solar transmittance (τ s ), reflectance (ρ s ), absorptance (α s ), infrared (IR) emittance (ε ir ) and sheet resistance (R s ) of different thin films were evaluated. Based on the optical characteristics the optimized condition of the film processing was identified to be spin coated at 3000 rpm. Subsequently, the nanoindentation technique was utilized to measure hardness and Young's modulus of the optimized film. The measured nanomechanical properties were found to be superior to those reported for sputtered vanadium oxide films. Finally, temperature dependent phase transition characteristics of optimized vanadium oxide films were studied by differential scanning calorimetry (DSC) technique. Reversible and repeatable phase transition was found to occur in the range of 44-48°C which was significantly lower than the phase transition temperature (i.e., 68°C) of bulk VO 2 .

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“…Solution-processing of the metal oxide interfacial layers has shown significant promise for reducing the complexity of the deposition of these materials. Previous studies have shown that vanadium oxide can be deposited from solution at low temperature in air without the need for any high temperature post-deposition treatments [ 24 , 25 , 26 , 27 , 28 ]. On the other hand, some optoelectronic devices which are fabricated at high temperatures require developed metal oxides which must be able to keep their properties under high temperature fabrication processes.…”

Section: Introductionmentioning

confidence: 99%

Thermally Stable Solution Processed Vanadium Oxide as a Hole Extraction Layer in Organic Solar Cells

et al. 2016

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Low-temperature solution-processable vanadium oxide (V2Ox) thin films have been employed as hole extraction layers (HELs) in polymer bulk heterojunction solar cells. V2Ox films were fabricated in air by spin-coating vanadium(V) oxytriisopropoxide (s-V2Ox) at room temperature without the need for further thermal annealing. The deposited vanadium(V) oxytriisopropoxide film undergoes hydrolysis in air, converting to V2Ox with optical and electronic properties comparable to vacuum-deposited V2O5. When s-V2Ox thin films were annealed in air at temperatures of 100 °C and 200 °C, OPV devices showed similar results with good thermal stability and better light transparency. Annealing at 300 °C and 400 °C resulted in a power conversion efficiency (PCE) of 5% with a decrement approximately 15% lower than that of unannealed films; this is due to the relative decrease in the shunt resistance (Rsh) and an increase in the series resistance (Rs) related to changes in the oxidation state of vanadium.

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Room-temperature and solution-processed vanadium oxide buffer layer for efficient charge injection in bottom-contact organic field-effect transistors

Cited by 9 publications

References 22 publications

Robust Inorganic Hole Transport Materials for Organic and Perovskite Solar Cells: Insights into Materials Electronic Properties and Device Performance

Robust Inorganic Hole Transport Materials for Organic and Perovskite Solar Cells: Insights into Materials Electronic Properties and Device Performance

Reversible, repeatable and low phase transition behaviour of spin coated nanostructured vanadium oxide thin films with superior mechanical properties

Thermally Stable Solution Processed Vanadium Oxide as a Hole Extraction Layer in Organic Solar Cells

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