NOVELTY - Aminoquinoxaline compound (Ia) is new.    USE - For film formation, electrochromic element, semiconductor device, solar cell, organic electroluminescnet element and non-linear organic material (all claimed).    ADVANTAGE - The (poly)aminoquinoxaline compound has outstanding heat resistance and storng fluorescent light emission characteristics, and easily controls electrochemical oxidation-reduction potential.    DETAILED DESCRIPTION - Aminoquinoxaline compound of formula (Ia) is new.    R1,R2=hydrogen, hydroxyl group, 1-10C alkyl or alkoxy group, or group A optionally substituted by group Y;    R3,R4= hydrogen, halogen atom, cyano, amino, nitro, 1-10C alkyl or alkoxy group, or group A optionally substituted by group Y;    X1=-NH-R5-NH2 or -NH-R6 group;    R5=1-10C alkylene group, -C(0)CH2 or -CH2, group B optionally substituted by group Y;    R6=hydrogen, 1-10C alkyl group, acetyl group, group A optionally substituted by group Y;    Y=halogen, cyano, nitro, amino, epoxy, vinyl, 1-10C alkyl, 1-10C haloalkyl, 1-10C alkoxy, 1-10C cyanoalkyl group or group A optionally substituted by group Z;    Z= halogen, cyano group, nitro, amino, epoxy, vinyl, 1-10C alkyl, 1-10C haloalkyl, 1-10C alkoxy, 1-10C cyanoalkyl, phenyl, biphenyl, naphthyl, thienyl, pyrrolyl, furyl or condensed heteroaryl group;    A=phenyl, pyridyl, biphenyl, naphthyl, thienyl, pyrrolyl, furyl or condensed heteroaryl group;    B=bivalent benzene, pyridene, biphenyl, naphthalene, thiophene, pyrrole, furan or fused heterocyclic rings;and    n=more than 1.    INDEPENDENT CLAIMS are included for the following: (i) polyaminoquinoxaline compound of formula (18a); (ii) film formed using polyaminoquinoxaline compound or aminoquinoxaline compound; (iii) electrochromic element formed using polyaminoquinoxaline compound or aminoquinoxaline compound; (iii) semiconductor device formed using polyaminoquinoxaline compound or aminoquinoxaline compound; (iv) p-type semiconductor formed by oxidizing polyaminoquinoxaline compound or aminoquinoxaline compound by an oxidizing agent or electrochemical doping; (v) n-type semiconductor formed by reducing polyaminoquinoxaline compound or aminoquinoxaline compound by a reducing agent or electrochemical doping; (vi) solar cell which comprises above p-type or n-type semiconductor; (vii) organic electroluminescent element formed using polyaminoquinoxaline compound or aminoquinoxaline compound; and (viii) non-linear organic material formed using polyaminoquinoxaline compound or aminoquinoxaline compound.