1. BULK AND BILAYER INVERTED ORGANIC SOLAR CELLS (OSCs) EXHIBITING D-A AND A-D-A DONORS WITH 2,2’-BI[3,2-b]THIENOTHIOPHENE UNITS AND PC61BM OR C70 ACCEPTORS. Authors: LEVI GABRIAN, GAVRIL-IONEL GIURGI, LORANT SZOLGA, ANDREEA PETRONELA CRIȘAN, ELENA BOGDAN, RAMONA GĂLĂTUŞ, ANAMARIA TEREC, ION GROSU.