TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Disclosed): Ring-closing reaction of a perylene derivative of formula (A) is carried out in the presence of catalyst e.g. tetrakis(triphenylphosphine)nickel and bis(cyclooctadiene)nickel, a base e.g. potassium carbonate and a cesium carbonate, and phase transfer catalyst e.g. tetrabutyl ammonium hydrogen sulfide and benzyl triethylammonium chloride to obtain indeno perylene derivative (II).X=halo chosen from bromo and chloro.Preferred Compound: The indeno perylene derivative (I) is of formula (I') or (I"). The indeno perylene derivative (II) is of formula (II').R101-R133=H, or 1-40C alkyl, 6-40C aryl, 5-40C heteroaryl, or 1-40C alkoxy (all optionally substituted).Preferred Material: The organic thin-film solar cell which has p layer formed using indeno perylene derivative (I), and n layer formed using fullerene derivative. SPECIFIC COMPOUNDS - 19 Indeno perylene derivatives (I) or (II) are disclosed e.g. N,N,3,10-tetraphenyloctacyclo(13.12.2.116,20.02,11.04,9.012,28.025,29.024,30)triaconta-1(27),2(11),3,5,7,9,12,14,16(30),17,20,22,25,28-tetradecaen-19-amine of formula (Ia), N,N-bis(4-methoxyphenyl)-3,10-diphenyloctacyclo(13.12.2.116,20.02,11.04,9.012,28.025,29.024,30)triaconta-1(27),2(11),3,5,7,9,12,14,16(30),17,20,22,25,28-tetradecaen-19-amine, N-(4-methoxyphenyl)-N-methyl-3,10-diphenyloctacyclo(13.12.2.116,20.02,11.04,9.012,28.025,29.024,30)triaconta-1(27),2(11),3,5,7,9,12,14,16(30),17,20,22,25,28-tetradecaen-19-amine, N,N-diphenylheptacyclo(12.9.2.12,6.011,24.015,20.021,25.010,26)hexacosa-1(23),2(26),3,6,8,11,13,15(20),16,18,21,24-dodecaen-17-amine and N,N,21,28-tetraphenyldecacyclo(17.13.2.22,5.03,15.04,12.06,11.016,33.020,29.022,27.030,34)hexatriaconta-2(36),3,5(35),6(11),7,9,12,14,16(33),17,20(29),21,23,25,27,30(34),31-heptadecaen-8-amine.    EXAMPLE - 19-Bromo-3,10-diphenyloctacyclo(13.12.2.116,20.02,11.04,9.012,28.025,29.024,30)triaconta-1(28),2(11),3,5,7,9,12,15,17,20,22,24(30),25(29),26-tetradecaene (in g) (1.2), diphenylamine (0.4), tris(dibenzylidene acetone)dipalladium (0) (0.03) and sodium t-butoxide (0.3) were suspended in anhydrous toluene (50 ml) under nitrogen atmosphere. Tri-t-butylphosphine/toluene solution was added and refluxed for 7 hours. The reaction mixture was filter-separated through silica gel pad, and washed with toluene (100 ml). The red oily solid obtained by carrying out solvent distillation of filtrate was purified by column-chromatography and N,N,3,10-tetraphenyloctacyclo(13.12.2.116,20.02,11.04,9.012,28.025,29.024,30)triaconta-1(28),2,4(9),5,7,10,12,15,17,20,22,24(30),25(29),26-tetradecaen-19-amine (1.2) was obtained at yield of 86%.