doping (p- and n-type)

https://doi.org/10.1351/goldbook.09476
Process that increases the thermal-equilibrium concentration of free charge carriers in a material to augment its electrical conductivity using chemical agents or additives (i.e. dopants).
Note: Typical dopants to organic polymers (compounds) are:
  1. Oxidants, giving positively charged (p-doped) polymers that act as hole conductors;
  2. Reductants, giving negatively charged (n-doped) polymers that mostly act as electron conductors;
  3. Strong Brønsted acids, which are indispensable dopants to polymers such as polyaniline.
Source:
PAC, 2020, 92, 1861. (Terminology of polymers in advanced lithography (IUPAC Recommendations 2020)) on page 1872 [Terms] [Paper]