TECHNOLOGY FOCUS - ELECTRONICS - Preferred Components: The device further comprises a hole blocking layer optionally comprising bathocuproine, lithium fluoride or bathophenanthroline, where the hole blocking layer is arranged between the electron transporting layer and the second electrode; and an electron barrier layer (130) optionally comprising poly(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid), molybdenum trioxide or vanadium pentoxide, where the electron barrier layer is arranged between the first electrode and the first semiconductive layer. The device comprises an anode (120), which is indium tin oxide, fluorine tin oxide, doped zinc oxide, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid), carbon nanotubes or graphene, and a cathode (180), which is aluminum, silver, calcium, magnesium or its alloy. The anode is arranged between the substrate and the first semiconductive layer. The cathode is placed after the electron transporting layer. The photovoltaic device comprises an optically transparent substrate, an indium tin oxide electrode, the first semiconductive layer comprising zinc phthalocyanine, a second semiconductive layer comprising a mixture of indium phthalocyanine chloride and 60C-fullerene, an electron transporting layer comprising 60C-fullerene, a hole barrier layer (170) comprising bathocuproine and an aluminum electrode separated on the hole barrier layer.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The first and second metallophthalocyanine is of formula (I). The first metallophthalocyanine is a divalent metallophthalocyanine, preferably zinc phthalocyanine, and the second metallophthalocyanine is a trivalent metallophthalocyanine, preferably indium phthalocyanine chloride. The weight ratio of second metallophthalocyanine to the electron acceptor in the second semiconductive layer is 1:99-99:1. The electron acceptor is C60-fullerene, (6,6)-phenyl-C61-butyric acid methyl ester, C70-fullerene, (6,6)-phenyl-C71-butyric acid methyl ester or a fullerene derivative.M = a divalent, trivalent or tetravalent metal atom;X = OH or halo;m = 0-2 or 4;m = 0-6;R = alkyl, alkoxy, aryl (all optionally substituted), halo, heteroaryl, phenoxy, phenylthio, CN or NO2; andp = 0 or 1.