Zinc Oxide Ink

The ZnO ink from infinityPV is optimized for large-scale fabrication of electron transport layers (ETL).

Zno Ink Form

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Zinc Oxide for Organic Solar Cells

ZnO (zinc oxide) based inks have been developed over a number of years and comprise a refined material that answers the specific needs of the quoted application in terms of both processing method, processing conditions and application.

The inks are reactive but in spite of this they have a long shelf life (several years, see video) provided that the storage conditions and handling methods detailed in the data sheets and the application notes are followed.

All ZnO inks are produced by infinityPV.

Key Features

Electron transport layer (ETL) for
- Organic solar cells (OPV)
- Perovskite solar cells
Doped and undoped ZnO
Low curing temperature (< 140°C)
Fast curing times
Sheet Processing
Roll-to-Roll Processing
Processing methods
- Slot-Die Coating (SD)
- Spin coating (SC)
- Doctor blading (DB), knife coating (KC)
- Gravure printing (GR)
- Rotary screen printing (RSP)
- Spray coating (SC)

Specifications and Cost

	Doped ZnO	Doped ZnO	ZnO (2.8% w/v)	ZnO (5.6% w/v)	ZnO
Solvent	Water	Methanol	Acetone (or IPA)	Acetone (or IPA)	Alcohol
Can be diluted	No	No	Yes	Yes	No
Can be concentrated	No	No	Yes	Yes	No
Solid content (g l-1)	-	-	28	56	-
Viscosity at 20 oC (mPa s)	1.7-1.8	0.45-0.50	< 0.3 (1.9)	< 0.3 (1.9)	27-30b
Dry thickness @ wet thickness (nm @ µm)	100 @ 10	100 @ 10	50 @ 10	100 @ 10	100 @ 10
Recommended wet thickness (µm)	7-12	7-10	7-12	7-12	10-20
Web speed in R2R (m min-1)	1-20	0.2-60	0.2-60	0.2-60	5-60
Drying temperature (oC)	80-140	20	20 (20-70)	20 (20-70)	50-80
Curing temperature (oC)	120-140	120-140	120-140	120-140	120-140
Curing time (min)	5-10	5-10	0-2	0-2	2-4
Application	ETL for ITO (OPV)	ETL for ITO (OPV)	ETL (OPV/Perovskite)	ETL (OPV/Perovskite)	ETL (OPV)
Available in sealed ampoule	No	No	Yes	Yes	No
Sheet-to-sheet (S2S):
Spin coating	+	+	+	+	-
Dr. Blading	+	+	+	+	-
Slot-die	+	+	+	+	-
Spray	+	+	+	+	-
Ink-jet	-	-	+a	+a	-
Roll-to-roll (R2R):
Knife	+	+	-	-	-
Slot-die	+	+	+	+	-
Rotary screen printing	-	-	-	-	+
Gravure	-	-	-	-	+
Ink-jet	-	-	(+)a	(+)a	-

a) depending on system and available in typical ink jet solvent mixtures with viscosities in the 10-30 mPas range
b) other viscosities available on request
IPA = isopropanol
NA = Not available

Build Your Own R2R Lab Coater

With its modular design, the Laboratory Roll-to-Roll Coater empowers you to customize your system with the components you need. Choose between slot-die heads, flexographic printers, slurry coaters, air knives, drying and curing units, knife cutters, laminators, laser systems and more.

Learn More About the Laboratory Roll-to-Roll Coater