NOVELTY - Polymers (A) containing at least 1mole% specific dihydrophenanthrene units (I) are new.    USE - (A) are used in organic electronic devices and electroluminescent materials, specifically in light-emitting diodes; integrated circuits; FET; thin-film transistors; solar cells; photoreceptors and laser diodes.    ADVANTAGE - Compared with known polymers, (A) provide greater luminescent efficiency, especially for blue emission; have longer working life and improved solubility in a wide range of solvents.    DETAILED DESCRIPTION - Polymers (A) containing at least 1mole% specific dihydrophenanthrene units of formula (I) are new, except for poly(arylenevinylene) compounds in which the arylene component is 9,10-dialkyl-9,10-dihydrophenanthrene.    each X = CR3R4 or NR3;    each Z = CR5 or N;    R1-R4 = hydrogen, fluoro, chloro, bromo, iodo, cyano, N(R6)2, Si(R6)3 or B(R6)2, 1-22C linear, branched or cyclic alkyl or alkoxy (in which one or more non-adjacent C may be replaced by NR6, O, S, OCOO, CONR6 or Si(R6)2, and one or more H can be replaced by F), 5-40C (hetero)aryl or aryloxy (in which one or more C can be replaced by O, S or N , also optionally substituted by one or more non-aromatic R1), and two or more R1-R4 may together form a ring system, provided that two substituents on a single C are not alkoxy or aryloxy and not all R1-R4 are simultaneously all H or all Me;    each R5 = H, F, cyano, N(R6)2 or B(R6)2, 1-22C alkyl or alkoxy (as above) or 5-40C (hetero)aryl or aryloxy (as above, optionally substituted by one or more non-aromatic R5), or several R5, or R5 with R1-R4, may together form another ring;    each R6 = H, 1-22 C alkyl (as above) or 5-40C aryl (as above, optionally substituted by one or more non-aromatic R6);    each A = 0 or 1; and    each b = 0-2.    INDEPENDENT CLAIMS are also included for the following:    (1) blends (A1) that contain one or more (A);    (2) solutions, containing one or more (A) or (A1) in one or more solvents;    (3) new bifunctional monomers (CVII);    (4) two methods for preparing (CVII); and    (5) organic electronic devices comprising one or more layers, at least one containing (A).    each AA = functional group; and    not all R1-R4 are simultaneously F or Cl.