TECHNOLOGY FOCUS - ELECTRONICS - Preferred Components: The organic electronic device is organic thin-film transistor equipped with a gate electrode (12), a gate insulating layer (13), an organic semiconductor layer (16) containing the tetramine derivative, a source electrode (15) and a drain electrode (16) on a substrate (11), or organic electroluminescent element equipped with an anode, a light-emitting layer, a positive hole transport layer and/or an electron carrying layer, and a cathode on the substrate, or organic thin-film solar cell equipped with electrode and photoelectric converting layer containing a hole transport material and an electron transport material on the substrate, or organic thin-film solar cell equipped with an electrode, a positive hole transport layer and/or an electron carrying layer, and a photoelectric converting layer on the substrate, where the positive hole transport layer and/or electron carrying layer are organic layers containing the tetramine derivative.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): Tetramine derivative (I) is prepared by reacting naphthalene or perylene and cyclic urea. Preferred Property: Tetramine derivative is soluble in water or organic solvent. Preferred Definitions:    R1,R2=H.    SPECIFIC COMPOUNDS - 3 Tetramine derivatives i.e. 1,3,6,8-tetramethyl-6,8-dihydropyrimido(4,5,6-gh)perimidine-2,7(1H,3H)-dione of formula (IA), 6,8-dihydropyrimido(4,5,6-gh)perimidine-2,7(1H,3H)-dione and 1,3,6,8-tetrahexyl-6,8-dihydropyrimido(4,5,6-gh)perimidine-2,7(1H,3H)-dione, are disclosed.    EXAMPLE - 0.13 g 5,7-Dimethyl-5,7,12,14-tetraazatetracyclo(6.6.2.04,16.011,15)hexadeca-1,3,8(16),9,11(15)-pentaene-6,13-dione and 8 mL dimethyl sulfoxide were stirred for 10 minutes in 20 mL glass-made container. At room temperature, 3.5 mL Aqueous solution of 0.085 g potassium hydroxide was added and stirred for 15 minutes. Then, 0.28 g iodomethane was dripped, stirred at room temperature for 4 hours, reaction solution was neutralized using hydrochloric acid, extracted with ethyl acetate, dried using sodium sulfate, and purified obtained crude product, to obtain 0.075 g 1,3,6,8-tetramethyl-6,8-dihydropyrimido(4,5,6-gh)perimidine-2,7(1H,3H)-dione.