NOVELTY - An organic electronic device comprises an anode, a cathode, a semiconducting layer between the anode and the cathode and a hole transporting layer between the anode and the semiconducting layer, where the hole-transporting layer comprises a copolymer containing fused (hetero)aryl based amine repeating unit and at least one co-repeat unit.    USE - As organic electronic device i.e. organic light-emitting device (claimed), organic photoresponsive devices (in particular organic photovoltaic devices and organic photosensors), organic transistors and memory array devices.    ADVANTAGE - The organic electronic device exhibits low weight, low power consumption and flexibility.    DETAILED DESCRIPTION - An organic electronic device comprises an anode, a cathode, a semiconducting layer between the anode and the cathode and a hole transporting layer between the anode and the semiconducting layer, where the hole-transporting layer comprises a copolymer containing fused (hetero)aryl based amine repeating unit of formula -(Ar1-N(R)-(Ar2-N(R))m-Ar1)- (I) and at least one co-repeat unit.    Ar1=fused aryl or fused heteroaryl group that may be optionally substituted with at least one substituent;    Ar2=aryl or heteroaryl group that may be optionally substituted with at least one substituent;    R=substituent;    m=1 or 2 (preferably 1).    Each Ar1 is directly bound to an aromatic or heteroaromatic group of a co-repeat unit. INDEPENDENT CLAIMS are included for the following:    (1) forming (M1) an organic electronic device involving forming the hole-transporting layer over the anode; forming the semiconducting layer over the hole-transporting layer; and forming the cathode over the semiconducting layer;    (2) new bis(fluorene) diamine based monomer of formula (VIIm);    (3) new co-polymer (C1) comprising bis(fluorene) diamine based repeating units of formula (VII) and at least one co-repeat unit, and where repeating units (VII) are directly bound through each point of attachment to an aromatic or heteroaromatic group of a co-repeat unit; and    (4) forming the polymer (C1).    R6 and R7=substituent;    x=0-3;    t=at least 1, optionally 1 or 2;    asterisk=point of attachment of the repeating unit (VII) to adjacent repeat units;    LG'=leaving group.