High Performing p-type Transparent Conducting Films via Solution Processing
- Detailed Technology Description
- P-type transparent conducting oxide (TCO) thin films were synthesized of misfit-layered calcium cobalt oxide using a cost-effective, scaleable solution process.
- Others
-
- Patent publication number US20170025196
- M. Aksit, S.K. Kolli, I.M. Slauch, and R.D. Robinson, “Misfit layered Ca3Co4O9 as a high figure of merit p-type transparent conducting oxide film through solution processing,” Applied Physics Letters 104, 16901 (2014)
- *Abstract
-
Sol-gel chemistry, spin coating or spray pyrolysis, and heat treatments are utilized to produce the high-performing films. Process parameters can be varied to produce sheet resistance as low as 5.7 kOhm/sq or with average visible range transparency as high as 67%, and optical transmission as high as 85% in the near infrared region. The top-performing film resulted in a 151 MOhm-1 figure of merit -- higher than other solution-processed, p-type TCO thin films and most others prepared by more expensive vapor deposition methods.
This new method should be applicable to a variety of materials, including atomically layered metal oxides, misfit layered metal oxides, and others. It presents opportunities for new TCO compositions in applications such as liquid crystal displays, solar cells, and touch screens, among others.
Potential Applications
- Efficient charge injection layers for organic light emitting diodes
- Solar cells with better band-matching current collectors
- Invisible circuits
- Near-infrared optoelectronics where n-type TCOs provide poor optical transmission
Advantages
- High performing, uniform p-type conductor
- Cost-effective, scaleable process
- Low-cost materials compared to typical n-type charge carrier (ITO)
- Applicable to a variety of compositions
- *Licensing
- Carolyn A. Theodorecat42@cornell.edu607 254 4514
- Country/Region
- USA
