TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The OPV cell is a single layer cell, a multilayer cell, a tandem cell or a dispersed heterojunction cell. The OPV cell further comprises: a substrate; a transparent electrode; a metal electrode; and an exciton blocking layer on and in contact with the organic photoactive layer, where the metal electrode is on and in contact with the exciton blocking layer. The transparent electrode is on and in contact with the substrate, where the organic photoactive layer is on and in contact with the transparent electrode and the metal electrode is on the organic photoactive layer. The thickness of the exciton blocking layer is 7.5-10 nm. The thickness of the organic photoactive layer is 20-120 nm. The organic photoactive layer further comprises an electron acceptor layer. The electron acceptor layer comprises a perylene derivative, 3,4,9,10-perylenetetracarboxylic bis-benzimidazole (PTCBI), a quinoxaline derivative, poly(phenylquinoxaline), carbon-60 or a composite polymer containing carbon-60. The OPV cell comprises (I) as the active layer. The active layer is on and in contact with the transparent electrode. Preferred Method: The method further comprises: forming the transparent electrode on and in contact with the substrate before forming the organic photoactive layer, so that the organic photoactive layer is formed on and in contact with the transparent electrode; and forming a metal electrode on the organic photoactive layer. The organic photoactive layer and the metal electrode are formed sequentially by vacuum deposition without breaking vacuum. The step of forming the organic photoactive layer comprises: refluxing a mixture of potassium tetrachloroplatinate and 8-hydroxyquinoline in glacial acetic acid to give a suspension; washing the suspension with water and acetone; and recrystallizing the suspension in dichloromethane or N,N-dimethylformamide to give (I).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The exciton blocking layer comprises a bathocuproine derivative, a bathophenanthroline derivative, a tris-8-hydroxy-quinolinato aluminum derivative or a 2,9-bis(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline derivative. SPECIFIC COMPOUNDS - The use of bis-(8-quinolinolato-N,O)platinum(II), bis-(2-chloro-8-quinolinolato-N,O)platinum(II), bis-(5,7-dichloro-8-quinolinolato-N,O)platinum(II), bis-(5,7-dibromo-8-quinolinolato-N,O)platinum(II) and bis-(5,7-dimethyl-8-quinolinolato-N,O)platinum(II) are specifically claimed as (I).    EXAMPLE - An organic photoactive layer containing at least one of the bis-(8-quinolinolato-N,0) platinum(II) complex was deposited onto the indium-tin oxide on glass (ITO-glass) substrate by vacuum deposition. An electron donor layer, preferably comprising carbon-60 was deposited onto the (I) or co-deposited with the (I). An exciton blocking layer preferably comprising bathocuproine (BCP) was then deposited onto the organic photoactive layer without breaking the vacuum. The metal electrode, preferably comprising aluminum was placed on top of the exciton blocking layer and organic photoactive layer to form the organic photovoltaic cell.