donor

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Chemical terminology

Donor refers to chemical reaction In the process, it can provide a certain chemical Group Substances.

Chinese name: donor
Foreign name: donor
Meaning: Can provide a certain chemistry Group Substance of

Discipline: Chemistry
See publications: Terminology of Biochemistry and Molecular Biology, Science Press
Time of publication: 2008^[1]

donor

（1） Refers to chemical reaction In the process, it can provide a certain chemical Group Substance of（ chemical compound )。 For example: l-amino acid And α-ketoacid Between Amino transfer reaction , L-amino acid is amino The donor of.

（2） Provide gene DNA fragment 、 organ 、 organization Or others Cells To another individual Of Biology 。

（3） On semiconductor Medium, if impurity or Defect energy level There are Electronics When occupied, impurity atoms or defect It is electrically neutral. Such impurity or defect is called donor, and its energy level is called donor energy level. Donor energy level The electrons on the can enter if a certain amount of energy is obtained conduction band ； This energy is called donor's ionization energy , which is the energy distance of donor energy level below the bottom of conduction band. The donor energy level with small ionization energy is shallow, and the donor energy level with large ionization energy is deep. phosphorus , arsenic antimony yes germanium 、 silicon Shallow level donor impurities in semiconductors. The shallow level donor impurity is called N-type impurity 。 Deep level donor impurity may become hole 's traps or Composite center 。

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