Two kinds of silicon PN junction device were made for irradiation by titanium tritide sources of different activities
and the electrical outputs were measured and analyzed. The results showed that the Isc (short circuit current)
Voc (open circuit voltage) and Pmax(maximum power output) increased with the tritium content
but the increases were not proportional to the tritium content. The electrical properties were affected by doping concentration and junction depth of the devices.