The present invention is directed to organic photosensitive optoelectronic devices and methods of use for determining the position of a
light source. Provided is an organic position sensitive
detector (OPSD) comprising: a first
electrode, which is resistive and may be either an
anode or a
cathode; a first contact in electrical contact with the first
electrode; a second contact in electrical contact with the first
electrode; a second electrode disposed near the first electrode; a donor semiconductive
organic layer disposed between the first electrode and the second electrode; and an
acceptor semiconductive
organic layer disposed between the first electrode and the second electrode and adjacent to the donor semiconductive
organic layer. A hetero-junction is located between the donor layer and the
acceptor layer, and at least one of the donor layer and the
acceptor layer is light absorbing. The OPSD has an
optical beam spatial resolution of 20 μm and measurements are insensitive to fluctuations in incident
light beam intensity and background illumination. The response of the OPSD shows high
linearity, low positional error,
high spatial resolution, and good
beam tracking velocity. The OPSDs exhibited linearities and positional uncertainties of <1%.