Photoelectric conversion element and imaging device
A photoelectric conversion element includes: an electrically conductive thin layer; an organic photoelectric conversion layer containing a compound having a partial structure represented by formula (I) and a fullerene or a fullerene derivative; and a transparent electrically conductive thin layer: X represents O, S or N—R 10 , R 10 represents a hydrogen atom or a substituent, R x and R y represent a hydrogen atom or a substituent, with at least one representing an electron-withdrawing group, R x and R y may combine to form a ring, R represents a bond (—), a hydrogen atom or a substituent, with at least one being the bond, nr represents an integer of 1 to 4, R's may be the same or different when nr is 2 or more, and R's at the 2- and 3-positions or R's at the 5- and 6-positions may combine with each other to form a ring.
1. A photoelectric conversion element comprising:
an electrically conductive thin layer;
an organic photoelectric conversion layer; and
a transparent electrically conductive thin layer,
wherein the organic photoelectric conversion layer contains a compound having a partial structure represented by formula (II) and a fullerene as a mixture:
wherein Ra, Rb and Rc each independently represents a substituent; na, nb and nc each represents an integer of 0 to 5; Ra's, Rb's or Rc's may be the same or different when na, nb and nc each is an integer of 2 or more, and each pair of two Ra's, two Rb's and two Rc's may combine with each other to form a ring, provided that na+nb+nc is not 0.
2. The photoelectric conversion element according to claim 1 , wherein Ra's at the 2-, 3-, 5- and 6-positions are the same; Rb's at the 2′-, 3′-, 5′- and 6′-positions are the same; or Rc's at the 2″-, 3″-, 5″- and 6″-positions are the same.
3. The photoelectric conversion element according to claim 2 , wherein each of the Ra's, Rb's and Rc's is a hydrogen atom.
4. The photoelectric conversion element according to claim 2 , wherein two of Ra at the 4-position, Rb at the 4′-position and Rc at the 4″-position are the same.
5. The photoelectric conversion element according to claim 2 , wherein two of Ra at the 4-position, Rb at the 4′-position and Rc at the 4″-position are a hydrogen atom.
6. The photoelectric conversion element according to claim 1 , wherein the electrically conductive thin layer, the organic photoelectric conversion layer, and the transparent electrically conductive thin layer are stacked in this order.