NOVELTY - A photoelectric conversion element (100) contains at least one pair of electrode (120,160) and active layer (140). The active layer contains fullerene compound substituted by dihydromethano group(s), and organic group(s) of formula (I)-(VII).    USE - Photoelectric conversion element is used for organic solar cell Uses include but are not limited to bonnet of motor vehicle, roof, trunk lid, door, front fender, filler, bumper, light emitting device, roof for reefer-container, battery for motor drive, outer wall of water purification plant, and sound insulation wall of highway.    ADVANTAGE - The photoelectric conversion element has excellent photoelectric conversion efficiency. The organic solar cell using photoelectric conversion element has excellent flexibility, and is lightweight.    DETAILED DESCRIPTION - A photoelectric conversion element contains at least one pair of electrode and active layer. The active layer contains fullerene compound substituted by dihydromethano group(s), and organic group(s) of formula (I)-(VII).    FLN=fullerene, in which C is coupled with organic group located in the same 5 membered ring or 6 membered ring in the fullerene skeleton;    r,s,t,u,v,w,x=0 or more;    r+s+t+u+v+w+x=1-5;    L=1-8;    R1=1-14C alkyl, 1-14C alkoxy or aromatic group (all optionally substituted);    R2-R4=H, optionally substituted aromatic group, 1-14C alkyl or 1-14C fluoroalkyl;    R5-R9=1-14C alkyl, aromatic group (both optionally substituted) or H;    Ar1=optionally substituted 6-20C aryl or 2-20C heteroaryl;    R10-R13=alkyl, amino, alkoxy, alkylthio (all optionally substituted) or H;    R10+R11,R12+R13=ring;    one of R14,R15=H, alkoxycarbonyl, optionally substituted 14C alkyl or optionally substituted aromatic group, and other is alkoxycarbonyl, optionally substituted 1-14C alkyl, or optionally substituted aromatic group;    Ar2-Ar5=2-20C heteroaryl or 6-20C aryl (both optionally substituted);and    R16,R17=aromatic group or 1-14C alkyl (both optionally substituted).    INDEPENDENT CLAIMS are included for the following:    (1) manufacture of fullerene compound of formula (VIII), which involves reacting an oxidizing agent with a fullerene compound of formula (IX);    (2) fullerene compound of formula (XI); and    (3) fullerene compound of formula (XII).    m"',m"=1 or 2;    m'=0 or 1;    R21-R23=1-30C hydrocarbyl, 1-30C alkoxy, 6-30C aryloxy, amino, silyl, alkylthio, arylthio, alkylsulfonyl, arylsulfonyl (all optionally substituted) or H;    u',t'=1-5;    one of R'14,R'15=1-14C alkyl, aromatic group (both optionally substituted), alkoxycarbonyl or H, and other is 1-14C alkyl, aromatic group (both optionally substituted) or alkoxycarbonyl;    Ar'1=3-10C aryl or optionally substituted heteroaryl;and    R'10-R'13=alkoxy, alkyl, amino (all optionally substituted) H, O or S.    H and silylmethyl group are also coupled on the same 5 membered ring or 6 membered ring of fullerene skeleton    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of photoelectric conversion element.    Photoelectric conversion element (100)    Substrate (110)    Electrode (120,160)    Hole taking-out layer (130)    Active layer (140)