Is ZnO n type or p-type?

Is ZnO n type or p-type?

n-type semiconductor
ZnO is a n-type semiconductor due to Oxygen vacancies, interstitials or antisites of Zn ion.

Why is ZnO P-type?

Dear Devendra, In order to obtain p-type of ZnO it is necessary provide the compensation of native donor defects such as oxygen vacancies and interstitial zinc atoms by doping. Usually the concentration of these defects in ZnO is very large. Thus that demands very high concentration of acceptors.

What are nanoparticles ZnO?

Zinc oxide nanoparticles are nanoparticles of zinc oxide (ZnO) that have diameters less than 100 nanometers. They have a large surface area relative to their size and high catalytic activity. The exact physical and chemical properties of zinc oxide nanoparticles depend on the different ways they are synthesized.

What is n-type and p-type semiconductor?

The majority carriers in a p-type semiconductor are holes. In an n-type semiconductor, pentavalent impurity from the V group is added to the pure semiconductor. Examples of pentavalent impurities are Arsenic, Antimony, Bismuth etc. The pentavalent impurities provide extra electrons and are termed as donor atoms.

Is ZnO direct or indirect band gap?

All ZnO NWs exhibit direct band gap in the W phase and indirect band gap in the H phase.

Why nickel oxide is p-type semiconductor?

Some of the Ni2+ ions have been oxidised to Ni3+ and some Ni2+ ions diffuse out to maintain charge balance leaving cation holes. The reason for the conduction is the ability of electrons to transfer from Ni2+ to Ni3+ ions. This basically allows the Ni3+ ions to move and black NiO is therefore a p-type semiconductor.

Is ZnO a semiconductor?

Zinc oxide (ZnO) is one of the interesting metal-oxide-based semiconductors with relatively biosafe and biocompatible properties which is very suitable for sensor/transducer applications and drug delivery to intracellular environment.

Why are ZnO nanoparticles important?

The ZnO nanoparticles constitute an effective antimicrobial agent against pathogenic microorganisms. Basically the detected active oxygen species generated by these metal oxide particles could be the main mechanism of their antibacterial activity.

How do you make ZnO nanoparticles?

ZnO nanoparticles were prepared by refluxing precursor zinc acetate dihydrate (0.1 M) in diethylene glycol and triethylene glycol at 180 °C and 220 °C respectively. Reaction time varied for 2 and 3 h with and without sodium acetate (0.01 M).

How do you disperse zinc oxide?

Normally, a dispersing agent is added to the zinc oxide suspension to ensure that the zinc oxide remains well distributed in the suspension during coating. A very convenient dispersing agent is an alkali metal silicate such as sodium or potassium silicate.

What is p-type material example?

What is P-type material? Semiconductors like germanium or silicon doped with any of the trivalent atoms like boron, indium or gallium are called p-type semiconductors. The impurity atom is surrounded by four silicon atoms. It provides the atoms to fill only three covalent bonds as it has only three valence electrons.

What is p-type semiconductor?

What is a p-type Semiconductor? A p-type semiconductor is an intrinsic semiconductor doped with boron (B) or indium (In). Silicon of Group IV has four valence electrons and boron of Group III has three valence electrons.

What is band gap of ZnO nanoparticles?

The optical band gap value obtained for ZnO nanoparticle at pH=7.5 is 3.63 eV.

What is P type oxide?

An alternative approach to attain high-performance p-type oxides TFTs is to find an oxide in which the VBM is made of spatially spread s orbitals. Such electronic structures were found in oxides of heavy metal cations, such as PbO, Bi2O3 and SnO.

What is the band gap of ZnO nanoparticles?

The estimated optical band gap of ZnO is found to be 3.63 eV which also clearly indicates the presence of blueshift at a growth temperature of 60 °C.