Is ZnO a semiconductor?
Although it occurs naturally as the mineral zincite, most zinc oxide is produced synthetically. ZnO is a wide-band gap semiconductor of the II-VI semiconductor group. The native doping of the semiconductor due to oxygen vacancies or zinc interstitials is n-type.
Why ZnO is P type semiconductor?
The type of semiconductor depended on the position of Fermi level, if Fermi level near the conductive band that leads to N-type (like ZnO), and inverse, the Fermi level is near a valance band that leads to form P-type (like NiO).
What is ZnO thin film?
ZnO is a well-known suitable candidate for the Transparent Conducting Oxide (TCO) layer of thin film compound solar cells. All the samples are tested for the optical transparency, band gap, and electrical resistivity before and after annealing. Band gap of film is observed to be 3.2 eV.
Is ZnO paramagnetic?
Magnetic measurements showed that all ZnO/CuO composites possessed room-temperature ferromagnetism, while pure ZnO was diamagnetic.
Is ZnO a base?
Pure ZnO is has basic nature (nanopowder). However if dissolved in ethanol the solution is acid. ZnO is amphoteric, so it can have both acidic or basic behaviour, depending on the media it is placed in… ZnO is amphoteric, so it can have both acidic or basic behavior, depending on the conditions.
What is ZnO chemistry?
Zinc oxide (ZnO) is a common inorganic compound with a large number of uses. It is insoluble in water but soluble in dilute acids and bases. Its melting point is extremely high—1975 ºC, where it also decomposes. ZnO exists in two common crystalline forms: wurtzite and zincblende.
Is ZnO polar or nonpolar?
It is known that Zinc oxide has positive charged Zn polar surface, negative charged O polar surface, and 6 non-polar faces.
Which type of conductivity is shown by Nonstoichiometric ZnO?
The diffusion process is found to be predominantly mediated by VO. We further demonstrate that, in contrast to the general belief of their neutral attribute, the oxygen vacancies in ZnO are actually +2 charged and thus responsible for the unintentional n-type conductivity as well as the nonstoichiometry of ZnO.
What are the processes of making ZnO thin film?
ZnO thin film could be prepared by physical or vacuum methods such as radio frequency (RF) magnetron sputtering or direct current (DC) sputtering, pulsed laser deposition (PLD), and e-beam evaporation [12, 13, 14, 15]. However, all of these methods need particular vacuum equipments and investment.
What is ZnO used for?
Zinc oxide is an inorganic compound used in a number of manufacturing processes. It can be found in rubbers, plastics, ceramics, glass, cement, lubricants, paints, ointments, adhesives, sealants, pigments, foods, batteries, ferrites, fire retardants, and first-aid tapes.
Is mno4 diamagnetic or paramagnetic?
Since MnO4− contains Mn(VII) with a d 0 configuration, it is diamagnetic (no unpaired electrons).
Does zinc oxide nanoparticles respond to a magnetic field?
Capping ZnO nanoparticles ( approximately 10 nm size) with different organic molecules produces an alteration of their electronic configuration that depends on the particular molecule, as evidenced by photoluminescence and X-ray absorption spectroscopies and altering their magnetic properties that varies from …