Detection device
According to an aspect, a detection device includes: a substrate; and a plurality of photodiodes provided in a detection area of the substrate. The photodiodes includes: a plurality of first electrodes provided correspondingly to the photodiodes; a second electrode provided across the photodiodes; and an organic photodiode layer that includes a first carrier transport layer, an active layer, and a second carrier transport layer, and is provided across the photodiodes. In the detection area, the first electrodes, the first carrier transport layer, the active layer, the second carrier transport layer, and the second electrode are stacked in the order as listed. Outside the detection area, a third electrode configured to be supplied with a reference potential is disposed between the second electrode provided so as to cover a side surface of the organic photodiode layer and the first electrodes arranged at an outermost periphery.
1 . A detection device comprising:
a substrate; and
a plurality of photodiodes provided in a detection area of the substrate, wherein
the photodiodes comprise:
a plurality of first electrodes provided correspondingly to the photodiodes;
a second electrode provided across the photodiodes; and
an organic photodiode layer that comprises a first carrier transport layer, an active layer, and a second carrier transport layer, and is provided across the photodiodes, wherein
in the detection area, the first electrodes, the first carrier transport layer, the active layer, the second carrier transport layer, and the second electrode are stacked in the order as listed, and
outside the detection area, a third electrode configured to be supplied with a reference potential is disposed between the second electrode provided so as to cover a side surface of the organic photodiode layer and the first electrodes arranged at an outermost periphery.
2 . The detection device according to claim 1 , wherein the third electrode surrounds an entire outermost periphery of the first electrodes.
3 . The detection device according to claim 2 , wherein the second electrode is electrically coupled to a wiring line routed in a peripheral area outside the third electrode.
4 . The detection device according to claim 1 , wherein the third electrode is disposed on all but one of sides surrounding an outermost periphery of the first electrodes.
5 . The detection device according to claim 4 , wherein
in an area where the third electrode is not disposed, the second electrode is located inside a side surface of the organic photodiode layer.
6 . The detection device according to claim 1 , wherein the third electrode is disposed on only one of sides surrounding an outermost periphery of the first electrodes.
7 . The detection device according to claim 6 , wherein, in an area of a plurality of sides where the third electrode is not disposed among the sides surrounding the outermost periphery of the first electrodes, the second electrode is located inside the side surfaces of the organic photodiode layer.
8 . The detection device according to claim 1 , wherein the second electrode provided so as to cover the side surface of the organic photodiode layer is electrically coupled to the first carrier transport layer, the active layer, and the second carrier transport layer on the side surface of the organic photodiode layer.
9 . The detection device according to claim 1 , further comprising:
a plurality of signal lines; and
a first switching element that is provided for each of the photodiodes and is configured to select the photodiode and output a detection signal to a corresponding signal line of the signal lines, wherein
the reference potential supplied to the third electrode is the same as a reset potential to make a potential of the signal lines constant.
10 . The detection device according to claim 1 , wherein the reference potential supplied to the third electrode is the same as a potential of the second electrode.