TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The anode comprises indium tin oxide. The cathode comprises aluminum.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The hole injection layer comprises poly(3,4-ethylenedioxythiophene) (PEDOT):poly(styrenesulfonate)(PSS). The active layer comprises (6,6)-phenyl C61 butyric acid methyl ester (PCBM). The active layer comprises a weight ratio of polymer to PCBM of 1:1-1:6. The active layer has a thickness of 60-100 nm. The BODIPY-based backbone polymer comprises substituted dipyrrolo(1,2-c:1',2'-f)(1,3,2)diazaborinine polymers of formula (I) or substituted 3,7-distyryl-dipyrrolo(1,2-c:1',2'-f)(1,3,2)diazaborinine polymers of formula (II), substituted 3,7-bis((E)-2-(thiophen-3-yl)vinyl)-dipyrrolo(1,2-c:1',2'-f)(1,3,2)diazaborinine polymers of formula (III), or substituted bis(4-((E)-2-(7-styryl-5,7-dihydrodipyrrolo(1,2-c:1',2'-f)(1,3,2)diazaborinin-3-yl)vinyl)phenyl) polymers of formula (IV), preferably diethyl 4,4'-(4-(8-ethynyl-5,5-difluoro-1,3,7,9-tetramethyl-dipyrrolo(1,2-c:1',2'-f)(1,3,2)diazaborinin-10-yl)-1,2-phenylene)bis(oxy)dibutanoate polymers of formula (V), or diethyl 4,4'-(4-(8-((4-decyl-5-ethynylthiophen-2-yl)ethynyl)-5,5-difluoro-1,3,7,9-tetramethyl-dipyrrolo(1,2-c:1',2'-f)(1,3,2)diazaborinin-10-yl)-1,2-phenylene)bis(oxy)dibutanoate polymers of formula (VI).A = -AR-, -CH=CH-AR-CH=CH-, -CC-AR-CC- or -CC-CC-AR-CC-CC-;AR = (hetero)arylene (preferably substituted 1,4-phenylene moiety of formula (a1), substituted pentacyclic moiety of formula (a2), substituted biaryl moiety of formula (a3), substituted triaryl moiety of formula (a4), (hetero)phenanthrene moiety of formula (a5), substituted (hetero)pentalene moiety of formula (a6), (ethene-1,2-diyl)bis(4,1-phenylene), substituted metalloporphyrin moiety of formula (a7), substituted porphyrin moiety of formula (a8), substituted indeno(1,2-b)fluorene-2,8-diyl moiety of formula (a9), substituted (2,2')bipyridinyl-metal complex moiety of formula (a10), substituted (1E,1'E)-2,2'-(1,4-phenylene)bis(ethene-2,1-diyl)bis(4,1-phenylene) moiety of formula (a11), substituted (ethyne-1,2-diyl)bis(4,1-phenylene) moiety of formula (a12), substituted (1Z,1'Z)-2,2'-(1,4-phenylene)bis(2-cyanoethene-2,1-diyl)bis((hetero)cyclopenta-1,3-diene-4,1-diyl) moiety of formula (a13), (1,3,4-oxadiazole-2,5-diyl)bis(4,1-phenylene), substituted (1E,1'E)-2,2'-(4-(dicyanomethylene)-4H-pyran-2,6-diyl)bis(ethene-2,1-diyl)bis(3,1-phenylene) moiety of formula (a14), substituted (1Z,1'Z)-2,2'-(9H-fluorene-2,7-diyl)bis(1-cyanoethene-2,1-diyl)bis(4,1-phenylene) moiety of formula (a15), substituted heterocyclic moiety of formula (a16), substituted bicyclic moiety of formula (a17), substituted borondipyrromethene moiety of formula (a18), substituted 9H-fluorene-2,7-diyl moiety of formula (a19), benzo(c)(1,2,5)thiadiazole-4,7-diyl, benzo(c)(1,2,5)selenadiazole-4,7-diyl, 6,7-dimethyl-(1,2,5)thiadiazolo(3,4-g)quinoxaline-4,9-diyl, or substituted heterocyclic moiety of formula (a20) or (a21)); eitherR1a-R1d = R, OR, H, (hetero)alkyl, OH, amino, thiol, carboxylic acid, nitrile, azide or halo; orR1a+R1b, R1c+R1d = aromatic ring; orR1a+R1b+R1c+R1d = aromatic ring; eitherR1e-R1g = R, OR, H, (hetero)alkyl, (hetero)aryl, OH, amino, thiol, carboxylic acid, nitrile, azide or halo; orR1e+R1f = form a ring;R1h-R1o = R, OR, H, (hetero)alkyl, OH, amino, thiol, carboxylic acid, nitrile, azide or halo; orR1i+R1j, R1m+R1n = form a ring; orR1p, R1q = H; orR1p+R1q = form an aromatic ring;R1s = H or OR;X = C or heteroatom;q = 1-3;M = Zn, Cu, Fe or Pt;M2 = Ru or Ir;bpy = (2,2')bipyridinyl;R3 = R, alkyl or (hetero)aryl, preferably substituted thiophen-3-yl moiety of formula (b1), substituted phenyl moiety of formula (b2), substituted fluoren-3-yl moiety of formula (b3) or substituted (2,2')bithiophenyl-5-yl moiety of formula (b4);R2f = R, OR, H, (hetero)alkyl, (hetero)aryl, OH, amino, thiol, carboxylic acid, nitrile, azide or halo;R2, R4, R6 = alkyl or H;R1, R5 = H, alkyl (preferably -CH3 or -CH2CH3) or -CH=CH-AR;R0 = F, -OR, R, (hetero)aryl, -CC-R, -CC-aryl, or -CC-heteroaryl, preferably substituted phenylethynyl moiety of formula (c1), substituted thiophen-3-ylethynyl moiety of formula (c2), or substituted 9H-fluoren-2-ylethynyl moiety of formula (c3);R = H, -(CH2)mR10, -(CH2)mCOO(CH2)pCH3, -(CH2)mSO3Na, -(CH2)mN(CH3)3+Br-, -(CH2)mCOH(CH2)pCH3, -(CH2)mOR10, -(CH2)mOR8, -CH2CH2(OCH2CH2)mOR10, -CH2CH2(OCH2CH2)mOR8, CH2CH2(OCH2CH2)mSR8 or -CH(CH2O(CH2CH2O)3-CH3)2;R8 = carbohydrate residue;R10 = H, (hetero)alkyl, OH, amino, ammonic acid, thiol, carboxylic acid, nitrile, azide, ethynylene, halo or tosylate;m = 0-100;n = 2-300; andp = 0-20.