TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): Phthalonitrile derivatives of formulae (2,3) are reacted to obtain phthalocyanine derivative (1).X5=X1;X6=X4;andn=same as defined above. Preferred Definitions:    X1=primary substituent group chosen from hydrogen, t-butyl group, OCH3, OC2H5, OC3H7, OC5H11, -OC6H13, OC7H15, OC8H17, OC9H19, OC10H21, N(CH3)2, N(C6H5)2, and t-C4H9-ph-o-;    ph=phenylene;    X2,X3=substituents chosen from electron donor group;and    X4=secondary substituent group chosen from -CH2Y, -CH(CH2Y)Y and -CH(CH2Y)2.    SPECIFIC COMPOUNDS - An example for phthalocyanine derivative of formula (1), such as phthalocyanine derivative of formula (PCH001) is disclosed.    EXAMPLE - Nitro phthalonitrile (in mg) (500), diethyl malonate (462) and potassium carbonate (1.18 g) were dissolved in dimethyl sulfoxide (15 ml), and heated at 80degrees C for 4 hours in nitrogen atmosphere. Dimethyl sulfoxide was distilled under reduced pressure. The reaction product was recrystallized using chloroform/methanol solvent to obtain phthalonitrile derivative (formula (A1)). The obtained derivative (A1) (1 g), cyanide derivative (formula (A2)) (1.484 g) and diazabicyclo undecene (100) were dissolved in pentanol, and heated for 20 hours. Solvent was distilled, and the obtained mixture was separated to obtain phthalocyanine derivative (A3). The obtained phthalocyanine derivative (A3) (100) and zinc acetyl complex (Zn(OAc)2.2H2O) (110) were dissolved in dimethyl formamide (20 ml) to obtain phthalocyanine intermediate (A4). The obtained intermediate (A4) was dissolved in ethanol (25 ml). Sodium (1 g) was added, and reaction was performed at room temperature for 7 days. Solvent was distilled, and the obtained solid substance was dissolved in ethanol, adjusted to pH of 3 using concentrated hydrochloric acid, and precipitated. The obtained precipitate was filter-separated and dried under reduced pressure to obtain target phthalocyanine derivative (PCH001). The obtained phthalocyanine derivative (PCH001) was used for forming photoelectric electrode of dye-sensitized solar cell. The obtained solar cell had high battery performance, and excellent photoelectric conversion efficiency.