TECHNOLOGY FOCUS - ELECTRONICS - Preferred Component: The dye-sensitized photoelectric conversion device comprises an electrically conductive layer being portion of or forming the working electrode (anode), a photosensitive layer comprising a semi-conductive metal oxide and a chromophoric substance, a charge transfer layer comprising compound (I) or composition, and electrically conductive layer being portion of or forming the counter electrode (cathode). The perovskite-based photoelectric conversion device comprises an electrically conductive layer being portion of or forming the working electrode (anode), a photosensitive layer comprising a perovskite absorber material, a charge transfer layer comprising triangulene oligomer (I) or composition, and electrically conductive layer being portion of or forming the counter electrode (cathode).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): The triangulene oligomer of formula (I) is manufactured by reacting triangulene compound of formula (IV) and triangulene compound of formula (V), in presence of transition metal-containing catalyst.y=0-(n-z);Hal1=cl, Br or I;z=0-(n-y);Ha=Cl, Br or I;andy+z=n.Preferred Composition: The triangulene oligomer is of formula (II) or (III). The transition metal-containing catalyst comprises bis(1,5-cyclooctadiene)nickel. The Perovskite absorber material is chosen from compound of the formula:(RdNH3)PbXa3,m=16-100;X'2, X'4=H, optionally substituted alkyl, alkoxy, alkylthio, (monoalkyl)amino, (dialkyl)amino, cycloalkyl, cycloalkoxy, cycloalkylthio, (monocycloalkyl)amino, (dicycloalkyl)amino, heterocycloalkyl, heterocycloalkoxy, hetero-cycloalkylthio, (monoheterocycloalkyl)amino, (diheterocycloalkyl)amino, aryl, aryloxy, arylthio, (monoaryl)amino, (diaryl)amino, hetaryl, hetaryloxy, hetarylthio, (monohetaryl)amino or (dihetaryl)amino;Rd=1-4C alkyl;andXa=Cl, Br or I. Preferred Definitions:    Ra, Rb=methyl;    R,R2,R3,R4,R5,R6,R13,R14,R15,R16,R7,R8,R9,R10,R11, R12=H;    X3=H;and    X1,X2,X4,X5=H.    EXAMPLE - 2.74 ml N-bromosuccinimide was added to solution of 0.5 g 4,4,8,8,12,12-hexamethyl-8,12-dihydro-4H-benzo(1,9)quinolizino(3,4,5,6,7-defg)acridine in 40 ml chloroform at 0 degrees C for 20 minutes. While warming up to room temperature, the resulting solution was stirred in the absence of light overnight. The reaction was quenched with a saturated aqueous solution of sodium thiosulfate (Na2S203). The resulting mixture was extracted with dichloromethane and the combined organic fractions were dried with magnesium sulfate. After filtration and evaporation of the solvent, the residue was subjected to column chromatography using silica and n-hexane/dichloromethane (4:1). Final recrystallization from ethanol yielded 0.55 g 2,6-Dibromo-4,4,8,8,12,12-hexamethyl-8,12- dihydro-4H-benzo(1,9)quinolizino(3,4,5,6,7-defg)acridine as a white powder.