TECHNOLOGY FOCUS - ELECTRONICS - Preferred Device: The organic electronic device further has a primary electrode and secondary electrode. The organic layer is hole injection layer (103), hole-transport layer (104), light-emitting layer, electron-transport layer (106) or electron injection layer (107).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (disclosed): Bromine-containing compound of formula (a) reacts with nitrogen-containing compound of formula: (HO)2B-L-N(-Ar2)(-Ar3) in presence of tetrahydrofuran/sodium hydroxide and tetrakis (triphenylphosphine)palladium, to obtain polycyclic compound of formula (c) as polycyclic compound (I). Preferred Compound: The polycyclic compound (I) is preferably of formula (II)-(V). Full Definitions:    A=group of formula (i);    B'=N(-Ar2)(-Ar3)-;    L=nitro, nitrile, halo, 1-20C alkyl, 1-20C alkoxy, amino (all optionally substituted by 6-60C aryl, nitro, nitrile, halo, 1-20C alkyl, 1-20C alkoxy, 2-60C optionally substituted heterocyclyl or divalent optionally substituted aliphatic hydrocarbyl) or single bond;    n=1-7;    Ar1-Ar3,R1-R6=H, halo, optionally substituted aliphatic hydrocarbyl, D, 1-60C alkyl, 1-60C alkoxy, 1-60C alkylamino, 1-60C arylamino, 1-60C alkyl thiophene-based group, 6-60C aryl thiophene-based group, 2-60C alkenyl, 2-60C alkynyl, 3-60C cycloalkyl, 6-60C aryl, 6-60C aryl substituted with D, 8-60C arylalkenyl, optionally substituted silane-based group, optionally substituted boron-based group, optionally substituted germanium-based group or optionally substituted 2-60C heterocyclyl (all optionally substituted by H, D, halo, CN, NO2, 1-60C alkyl, 1-60C alkoxy, 1-60C alkylamino, 1-60C arylamino, 1-60C alkyl, 2-60C alkenyl, 2-60C alkynyl, 6-60C aryl, 6-60C aryl substituted by D, 3-60C cycloalkyl, 7-60C alkyl, 8-60C arylalkenyl, optionally substituted 2-60C heterocyclyl, optionally substituted silane-based group, optionally substituted boron-based group, optionally substituted germanium-based group, or 2-60C heteroaryl having O, N, S and P (optionally substituted by 6-60C aromatic ring, 4-60C alicyclic fused ring, arylamino, 6-60C aryl, 6-20 aryl substituted by deuterium, 7-20C alkyl, 8-20C arylalkenyl, 2-20C heterocyclyl or 2-20C alkenyl));    X=NR10, O, S, P, or SiC(R13)(R14)(R11)(R12);    R10-R14=H, halo, optionally substituted 1-20C alkyl, D, 1-60C alkyl, 1-60C alkoxy, 1-60C alkylamino, 1-60C arylamino, 1-60C alkylthiophene-based group, 6-60C aryl thiophene-based group, 2-60C alkenyl, 2-60C alkynyl, 3-60C cycloalkyl, 6-60C aryl, 6-60C aryl substituted by deuterium, 8-60C arylalkenyl, optionally substituted silane-based group, optionally substituted boron-based group, optionally substituted germanium-based group or optionally substituted 2-60C heterocyclyl (optionally substituted by H, D, halo, CN, NO2, 1-60C alkyl, 1-60C alkoxy, 1-60C alkylamino, 1-60C arylamino, 2-60C alkenyl, 2-60C alkynyl, 3-60C cycloalkyl, 6-60C aryl, 6-60C aryl substituted by deuterium, 7-20C alkyl, 8-20C arylalkenyl, optionally substituted 2-60C heterocyclyl, acetylene-based group, optionally substituted silane-based group, optionally substituted boron-based group or optionally substituted heterocyclyl containing O, N, S, Si and P);and    adjacent Ar1-Ar3,R1-R6=optionally substituted saturated or unsaturated rings.    SPECIFIC COMPOUNDS - 189 Polycyclic compounds (I) e.g. N-(9,9-diphenyl-9H-fluoren-2-yl)-4-phenyl-N-(4-phenylphenyl)-4H-thieno(3,2-b)indol-7-amine of formula (IA), diphenyl-(4-(4-phenyl-4H-thieno(3,2-b)indol-7-yl)-naphthalen-1-yl)-amine, diphenyl-(4-(4-phenyl-4H-thieno(3,2-b)indol-7-yl)-naphthalen-1-yl)-amine, diphenyl-(4-(4-phenyl-4H-thieno(3,2-b)indol-7-yl)-naphthalen-1-yl)-amine, and biphenyl-4-yl-naphthalen-2-yl-(4-(4-phenyl-4H-thieno(3,2-b)indol-7-yl)-phenyl)-amine are specifically claimed.    EXAMPLE - (4-((9,9-Diphenyl-9H-fluoren-2-yl)(4-phenylphenyl)amino)phenyl)boranediol, and 7-bromo-4-phenyl-4H-thieno(3,2-b)indole were added to solution containing tetrahydrofuran (500 ml), water (250 ml), and tetrakis(triphenylphosphine)palladium, refluxed for 24 hours, washed and subjected to silica gel column chromatography to obtain N-(9,9-diphenyl-9H-fluoren-2-yl)-4-phenyl-N-(4-phenylphenyl)-4H-thieno(3,2-b)indol-7-amine (IA) having yield of 71%.