TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The electronic, optical or optoelectronic device is configured: as an organic photovoltaic device comprising an anode, cathode and semiconductor component in between the anode and the cathode; as an organic light emitting diode comprising a substrate, anode, cathode and the semiconductor component in between the anode and the cathode; or as an organic transistor further comprising a third electrode and a dielectric component, where the semiconductor component is in contact with the first and the third electrode, and the dielectric component is in contact with the semiconductor component on one side and the second electrode on an opposite side. The organic transistor is an organic thin film transistor or organic light emitting transistor. The organic photovoltaic device is a bulk heterojunction photovoltaic device. The semiconductor component is photoactive and comprises a blend material comprising (I).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The blend material further comprises a fullerene compound. The fullerene compound is (6,6)-phenyl-61C butyric acid methyl ester.    TECHNOLOGY FOCUS - POLYMERS - Preparation: No preparation method is given. Preferred Components: (I) comprises a second repeat unit comprising: at least one polycyclic aryl(hetero), monocyclic aryl(hetero) (both optionally substituted) or at least one linear conjugated linkers. The second repeat unit is tricyclic compounds of formula (II).X = N or CR3 (preferred);Y1 = N or CR4 (preferred);R3, R4 = H (preferred), -L-R, branched 6-40C alkyl or branched 6-40C alkoxy (both optionally substituted by silyl);R8, R9 = H or -L-R; andn = 10-10000. EXAMPLE - 3,6-Bis-thieno(3,2-b)thiophen-2-yl-2,5-dihydro-pyrrolo(3,4-c)pyrrole-1,4-dione (1.2 g), 5-iodomethyl-undecane (2.59 g), cesium carbonate (3.13 g) were charged into flask (100 ml), and purged with argon for 10 minutes and then dimethylformamide (50 ml) was added. The mixture was heated at 60 degrees C for 36 hours and then cooled. Then chloroform (50 ml) was added. The reaction mixture was worked up to give 2,5-Bis-(2-butyl-octyl)-3,6-bis-thieno(3,2-b)thiophen-2-yl-2,5-dihydropyrrolo(3,4-c)pyrrole-1,4-dione. (VI) (0.7 g) was purged with argon and then chloroform (30 ml) was added. The system was kept in absence of light and then N-bromosuccinimide (0.466 g) was added. The mixture was stirred overnight before quenching with water (50 ml). The reaction mixture was worked up to give 3,6-Bis-(5-bromo-thieno(3,2-b)thiophen-2-yl)-2,5-bis-(2-butyl-octyl)-2,5-dihydro-pyrrolo(3,4-c)pyrrole-1,4-dione (VII). (VII) (50 mg), 4,8-bis-(2-ethyl-hexyl)-2,6-bis-trimethylstannanyl-benzo(1,2-b:4,5-b')dithiophene (40.8 mg), tris(dibenzylideneacetone)dipalladium(0) (2.02 mg) and tri-tert-butylphosphine (2.68 mg) were combined in a flask (50 ml). The system was purged with argon and then anhydrous chlorobenzene (10 ml) was added. The reaction mixture was heated at 130 degrees C for 18 hours and cooled. The polymer was precipitated out from methanol and purified using Soxhlet extraction with methanol, hexane, tetrahydrofuran and toluene. The product was extracted again with a Soxhlet setup with chloroform to give poly(3-(5-(2,8-bis(2-ethylhexyl)-4,10-dithiatricyclo(7.3.0.03,7)dodeca-1,3(7),5,8,11-pentaen-5-yl)thieno(3,2-b)thiophen-2-yl)-2,5-bis(2-butyloctyl)-6-(thieno(3,2-b)thiophen-2-yl)-1H,2H,4H,5H-pyrrolo(3,4-c)pyrrole-1,4-dione).