In the presented work, the compatibility of photoelectric readout of the spin state of nitrogen vacancy centers with the recently discovered strong creation yield en- hancement for these centers by sulfur doping of the host material was successfully demonstrated. For this purpose, first a measurement setup was built, where photoelectric detection of magnetic resonance is possible in the continuous wave as well as in the pulsed mode. Using this setup and a diamond sample that was prepared with ion implan- tation, it could be proven by a suitable separation of the measurement spots as well as the selected sequence of implantation and measurement steps that photoelectric spin readout is not only possible despite strong sulfur doping, but in fact also results in a moderate improvement of the signal-to-noise ratio. However, the investigations also reveal the occurrence of an additional photocurrent associated with the sulfur doping, which could be observed delocalized from the implantation site on the entire sample. This additional photocurrent represents a significant interfering signal at least for the continuous wave mode, which is, however, the less relevant operation mode for spin readout. In the last part of this work, efforts have been made to understand the interfering signal and its origin in more detail. Investigations of the electrical conductivity of the sample as a function of the wavelength of the excitation light revealed impor- tant properties that clearly narrow down the field of potential sources, although no definite identification was possible.