NOVELTY - An organic photosensitive optoelectronic device comprises an anode, a cathode, and a donor-acceptor heterojunction between the anode and the cathode. The heterojunction comprises a donor (152)-like material and an acceptor (154)-like material. The donor-like material or the acceptor-like material comprises subphthalocyanine, subporphyrin, and/or subporphyrazine compound. The device optionally comprises a blocking layer or a charge transport layer. The blocking layer and/or the charge transport layer comprises subphthalocyanine, subporphyrin, and/or subporphyrazine compound.    USE - An organic photosensitive optoelectronic device including solar cell, visible spectrum photodetector or photosensor (claimed).    ADVANTAGE - The organic photosensitive optoelectronic device has improved efficiency.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method of preparing a heterojunction including donor-like material and acceptor-like material, comprising:    (A) selecting a donor-like material having a Lowest Unoccupied Molecular Orbital (LUMO) and a highest occupied molecular orbital (HOMO), selecting a subphthalocyanine or a subporphyrin material, substituted with electron withdrawing or electron donating substituent group(s), where the substituent group modulates the subphthalocyanine or subporphyrin material LUMO and HOMO, such that the subphthalocyanine or subporphyrin material is an acceptor-like material for the donor-like material, and forming a heterojunction from the donor-like and acceptor like materials; or    (B) selecting an acceptor-like material, selecting a subphthalocyanine, subporphyrin, or subporphyrazine material, substituted with electron withdrawing or electron donating substituent group(s), where the substituent group modulates the subphthalocyanine, subporphyrin, or subporphyrazine material LUMO and HOMO, such that the subphthalocyanine, subporphyrin, or subporphyrazine material is a donor-like material for the acceptor-like material, and forming a heterojunction from the donor-like and acceptor like materials.    DESCRIPTION OF DRAWING(S) - The drawing is a sectional diagram of a donor-acceptor heterojunction.    Photon (6)    Exciton (8)    Donor (152)    Acceptor (154)