Introduced first here are the simple principles of the organic photoconductive materials, then the functions of the organic photoconductor drum, as a very important part in modern photoelectric imaging facilities, are described; finally some experience about the maintenance of OPC drum is summed up.

In this paper, advances in materials and applications of organic semiconductor solar sensors are reviewed, including modeling organic photoconductors and pr cells, design, synthesis, and purifications of solar grade organic photoconductors, fabrication and testing of pr cells.

Synthesis of hole transport material TTB and its application in OPC;

Thermal stability of organic conductor of N-n-butylisoquinoline 7,7,8,8-tetracyanoquinodimethane charge transfer complex;

In addition,molecular crystals of organic conductors have been intensively studied in recent years in terms of one-dimensional conductors,photoconductors or superconductors.

The content in this paper is to describe about preliminary survey technology of conductor resistance,and the mainly content is to introduction about measure resistance of organic conductor,from the principle,it could be also to use for the resistance survey of common conductor.