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

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

Abdullah Alsulami, Jonathan Griffin, Rania Alqurashi, Hunan Yi, Ahmed Iraqi, David Lidzey, Alastair Buckley

Materials (Basel). 2016 Mar 25;9(4):235.

PMID: 28773356

Abstract:

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP5588841	Vanadium(V) oxytriisopropoxide		5588-84-1	Price

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