TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Components: The organic photoelectric conversion layer has a bulk-heterostructure formed in a state of (I) and the fullerene or its derivative being mixed. The organic photoelectric conversion layer is formed by a vacuum vapor deposition method. The transparent electrically conductive thin layer is an electrode layer from above which light is incident into the organic photoelectric conversion layer. The transparent electrically conductive thin layer includes a transparent electrically conductive oxide. The transparent electrically conductive thin layer is formed directly on the organic photoelectric conversion layer. An electric field of 10-4-1x 107 V/cm is applied between electrodes of (A).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: (I) is a cyclic compound of formula (Ia). The fullerene is C60. The ratio of the fullerene or its derivative to (I) is 50 mol.% or more, preferably 300 mol.% or more.Z1 = atomic group necessary for forming a 5- or 6-membered ring, preferably indan-1,3-dione group of formula (a), cyclopenta(b)naphthalene-1,3-dione group of formula (b) or dihydro-pyrimidine-4,6-dione group of formula (c);L1-L3 = optionally substituted methine group;D1 = atomic group, preferably amine groups of formula (d)-(f); eitherR1-R6 = H or substituent; orR1R2, R3R4, R5R6, R2R5, R4R6 = ring; eitherR11-R14, R20-R24, R30-R34 = R1; orR11-R14, R20-R24, R30-R34 may combine together = ring; eitherR91-R98, R1x, R1y = R1, where R97 and R98 are preferably optionally substituted phenyl; orR91R92, R92R1x, R1xR94, R94R97, R93R1y, R1yR95R96, R97R98 = ring; orR1xR1x, R1yR1y = 6-membered rings, when m is 2 or more;m = 0 or more, where the bonding part to L3 or to L1, when n is 0 may be at the position of R91-R93 and when the bonding part to L3 is at the position of R91-R93, the substituent or hydrogen atom corresponding to R91-R93 may be bonded to the site denoted as the bonding part to L3 or to L1 and adjacent R's may combine together to form a ring;R41, R44-R48, R81, R82 = R1, where R81 and R82 is preferably alkyl;R83 = O or S (both preferred) or substituent; andn = 0 or more, preferably 0.