An important transition metal oxide target with unique electrical, optical and magnetic properties, widely applied in fields such as electronic devices, energy storage and catalysis.

 

1. Characteristics

1) Electrical Properties

   ・Semiconductor Properties

   NiO is a p-type semiconductor with a bandwidth of approximately 3.6-4.0 eV, making it suitable for electronic devices and   

   sensors.

   ・Resistance adjustable

   Resistivity can be adjusted by adding Li, Cu, etc., and is used in Resistive random access memory (RRAM) and resistance     

   change memory.

2) Optical performance

   ・High Visible Light Absorption Strength

   Strong absorption in the UV-visible region, suitable for photovoltaic devices and solar cells.

   ・Electrochromic effect

   Color can be changed by electric field (transparent ↔ dark color for Smart Window).

3) Chemistry and thermal stability

   ・Corrosion resistance

   Chemically stable at room temperature and resistant to acid-alkali corrosion.

   ・High melting point (~ 1955°C)

   Suitable for high temperature sputtering processes such as magnetron sputtering and PLD.

4) Magnetic properties

   ・Antiferromagnetic (Neel temperature ~ 523 K), which can be used for spintronics.

 

2. Main Applications

1) Electronic and semiconductor devices

   ・Resistive random access memory (RRAM)

   Non-volatile memory is produced by utilizing the resistance change characteristics of NiO.

   ・Transparent conductive thin film (TCO)

   Used for flexible displays and touch screens after addition of NiO.

   ・Gas sensors

   Sensitive to NO tamper, CO, and other gases and used for environmental monitoring.

2) Energy storage and conversion

   ・Lithium ion battery (LIB)

   As anode material or solid electrolyte interface layer.

   ・Supercapacitor

   Suitable for high capacitors and energy storage devices.

   ・Solar cells: used as hole transport layer (HTL) or buffer layer.

3) Intelligent materials

   ・Electrochromic devices (ECD)

   Used in smart windows and anti-glare mirrors to adjust light transmittance.

   ・Thermochromic coatings

   Used to change color in response to temperature and to save energy in architectural glass.

4) Catalyst and environmental protection

   ・Photocatalytic decomposition of pollutants: decomposes organic pollutants (dyes, VOCs, etc.) under ultraviolet light.

   ・Fuel cell electrodes: Improve oxygen reduction reaction (ORR) efficiency.