TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: (II) is prepared by reacting reducing agent and metal compound and bubbling carbon monoxide and oxidant. The reaction step is carried out at 70-90 degrees C. The method comprises refluxing the reactant using benzoquinone derivative under nitrogen gas metathesis state for 12-18 hours. The step of removing the metal carbonyl in the benzoquinone derivative comprises adding cupric chloride in the benzoquinone derivative and then decomposing and reacting. Preferred Components: The metal compound is magnesium hydroxide, magnesium nitrate, magnesium carbonate, magnesium sulfate, magnesium acetate, ferric nitrate, ferric sulfate, ferric chloride, ferrous nitrate, inorganic iron, ferrous chloride and/or titanium tetrachloride. The reducing agent is present in an amount of 5-10 pts. wt. The carbodiimide base is bis(trimethylsilyl)carbodiimide. A ratio of organic-metal compound and (I) is 1:2. The organic-metal compound is of formula (LiAl(B)2) or (Al(B)2), and has a needle-shaped structure, a length of 2-5 mu m, and a thickness of 1-10 Angstrom .B = (I).    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The solar cell further comprises an organic-metal compound layer formed on an interface between the cathode electrode and the buffer layer. EXAMPLE - Sodium borohydride (1.54 g) was melted in tetrahydrofuran (100 ml) to form a mixture. Ferric chloride (1.26 g) of the anhydrous was added into the tetrahydrofuran (50 ml) and was slowly dropped to the mixture for 1 hour for bubbling. This mixture was stirred for 9 hours. Acetic acid (4 g) was slowly added into the mixture and was stirred for more than 30 minutes. The carbon monoxide bubbling was stopped and inside of the flask was substituted using the nitrogen gas. 1-Octine (0.090 g) was added and refluxed to the temperature of 70 degrees C for 12 hours. The mixture was cooled to the room temperature after adding copper chloride hydrate (6.8 g) and acetone (20 ml) with metal carbonyl. The saturation sodium chloride aqueous solution (40 ml) was poured and then dried after addition of calcium chloride and evaporated to obtain 2,5-hexyl-1,4- benzoquinones. 2,5-Dihexyl-1,4-benzoquinone (0.091 g) was melted in the dichloromethane (20 ml) and cooled at 0-5 degrees C. Titanium chloride (547 mg) was introduced into the mixture and then stirred for 30 minutes and bis(trimethyl silyl)carbodiimides (1068 mg) was added and the precipitate was introduced in dichloromethane. After the reaction was finished, the mixture was washed using water. The organic layer was separated and dried using calcium chloride and column separation was performed using dichloromethane and was dried to obtain dihexyldicyanoquinonediimine.