NOVELTY - A fluorene derivative (I) is new.    USE - New fluorene derivative is used for organic electric device e.g. organic electroluminescent device, organic solar cell, organophotoreceptor and organic thin film transistor (all claimed).    ADVANTAGE - The fluorene derivative provides organic electric device having excellent luminous efficiency, low driving voltage, chromic purity, stability and durability.    DETAILED DESCRIPTION - A fluorene derivative of formula (I) is new.    R1,R2=1-50C alkyl (optionally substituted by 1-20C alkyl, 2-20C alkenyl, 1-20C alkoxy, 6-20C aryl, 6-20C aryl (substituted by deuterium), 7-20C arylalkyl, 8-20C aryl alkenyl, 2-20C hetero ring, nitrile or acetylene), 2-20C alkenyl (optionally substituted by H, deuterium, tritium, halo, 1-20C alkyl, 2-20C alkenyl, 1-20C alkoxy, 6-20C aryl amine, 6-60C aryl, 6-20 aryl (substituted by deuterium), 7-20C arylalkyl, 8-20C aryl alkenyl, 2-20C hetero ring, nitrile or acetylene), or 6-60C aryl, 8-20C aryl alkenyl, silane, B, Ge or 2-20C heterocycloalkyl ring;    n=1 or 2;and    L=1-50C alkyl (optionally substituted by H, deuterium, halo, 2-20C alkenyl, 1-20C alkoxy, 6-20C aryl, 6-20C aryl (substituted by deuterium), 7-20C arylalkyl, 8-20C aryl alkenyl, 2-20C hetero ring, nitrile or acetylene), 6-60C aryl (optionally substituted by H, deuterium, halo, 1-20C alkyl, 1-20C alkoxy, 1-20C alkyl amine, 1-20C alkyl thiophene, 6-20C aryl thiophene, 2-20C alkenyl, 2-20C alkynyl, 3-20C heterocycloalkyl, 6-20C aryl, 6-20C aryl (substituted by deuterium), 8-20C aryl alkenyl, silane, B, Ge, 2-20C hetero ring or 6-60C aryl), 2-60C hetero ring, 6-60C aryl amine (optionally substituted by H, deuterium, halo, amino, nitrile, nitro, 1-20C alkyl, 2-20C alkenyl, 1-20C alkoxy, 3-30C heterocycloalkyl or 6-60C aryl), 2-20C alkenyl (optionally substituted by H, deuterium, halo, 1-20C alkyl, 2-20C alkenyl, 1-20C alkoxy, 6-20C aryl amine, 6-60C aryl, 7-20C arylalkyl, 8-20C aryl alkenyl, 2-20C hetero ring, nitrile or acetylene), 1-30C alkoxy (optionally substituted by H, deuterium, halo, 2-20C alkenyl, 1-20C alkoxy, 6-20C aryl, 7-20C arylalkyl, 8-20C aryl alkenyl, 2-20C hetero ring, nitrile or acetylene), 6-30C aryloxy (optionally substituted by single bond, nitro, nitrile, halo, 1-20C alkyl, 1-20C alkoxy, 6-20C aryl, 2-20C hetero ring or 6-60C arylene), 6-20C aryl (optionally substituted by 1-20C alkyl, nitro, nitrile, halo, 1-20C alkyl or 1-20C alkoxy), or 3-60C heteroaryl.    "Full definitions are given in DEFINITIONS - Full Definitions" section. An INDEPENDENT CLAIM is included for organic electric device.