A new material supposed to have a mixed structure of polyacenic skeletons has been prepared from phenol-formaldehyde resin through the pyrolytic process. This material is air-stable, showing a wide variation of electrical conductivity with pyrolytic temperature. Moreover, it has been confirmed that the present material can be doped with an electron acceptor (iodine) and an electron donor (sodium) in a successful manner, giving rise to a maximum increase in the conductivity of more than seven and eleven orders of magnitude, respectively. The results of the electron probe X-ray microanalysis (EPMA) with respect to the doped samples have shown a uniform distribution of the dopants inside these materials. © 1984.
Tanaka, K., Ohzeki, K., Yamabe, T., & Yata, S. (1984). A study on the pristine and the doped polyacenic semiconductive materials. Synthetic Metals, 9(1), 41–52. https://doi.org/10.1016/0379-6779(84)90040-7