NOVELTY - A polycyclic compound (I) is new.    USE - New polycyclic compound is used for organic electric device e.g. organic electroluminescent device, organic solar cell, organophotoreceptor drum and organic thin film transistor (all claimed). Uses include but are not limited to personal digital assistant, electronic dictionary, remote control, navigation, game machine, mobile communications, cellular phone, computers and portable media player.    ADVANTAGE - The organic electric device using the polycyclic compound has excellent durability, stability and thermal resistance, and low driving voltage.    DETAILED DESCRIPTION - A polycyclic compound of formula: A-L-(B')n (I) is new.    A=group of formula (i);    B'=N(-Ar2)(-Ar3)-;    L=nitro, nitrile, halo, 1-20C alkyl, 1-20C alkoxy, amino 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;    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;and    adjacent Ar1-Ar3,R1-R6=optionally substituted saturated or unsaturated rings.    "Full definitions are given in the DEFINITIONS (Full Definitions) field". An INDEPENDENT CLAIM is included for organic electronic device, which has an organic layer containing polycyclic compound (I).    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of organic electroluminescent device. (Drawing includes non-English language text)    Substrate (101)    Positive electrode (102)    Hole-injection layer (103)    Hole-transport layer (104)    Light-emitting layer (105)    Electron-transport layer (106)    Electron-injection layer (107)    Negative electrode (108)