Star-shaped organic semiconductors with planar triazine core and diketopyrrolopyrrole branches for solution-processed small-molecule organic solar cells

Design of Diketopyrrolopyrrole (DPP)‐Based Small Molecules for Organic‐Solar‐Cell Applications

“…The stronger electron‐donating character and more efficient π–π* charge transfer of tert‐butyl‐substituted triphenylamine endowed g8 a red‐shifted absorption band in favor for the photocurrent generation. The material g8 showed higher PCE and J sc than that of g9 with carbazole as end groups …”

An overview on synthetic strategies for the construction of star-shaped molecules

“…Diketopyrrolo[3,4-c]pyrrole linked to triphenylamine, thiophene and/or carbazole. Shiau et al149 reported the synthesis of a series of star-shaped molecules with triazinecore 417, 419 and 421 in 69, 70 and 68% yields, as a donor materials for organic solar cells, through Suzuki coupling reaction of tris(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2yl)phenyl)-1,3,5-triazine 412 with the appropriate bromo derivatives 416, 418 and 420, respectively, in the presence of Pd(PPh 3 ) 4 in reuxing toluene (Schemes 111-113).4.3.4. Miscellaneous heterocyclic-cored SSMs with different arms 4.3.4.1.…”

Synthesis of the diketopyrrolopyrrole/terpyridine substituted carbazole derivative based polythiophenes for photovoltaic cells

“…According to procedures reported in the literature, 4 0 -(4-bromophenyl)-2-2 0 :6 0 ,2 00 -terpyridine (1), 3,6-di(2-bromothien-5-yl)-2,5-di(2-ethylhexyl)pyrrolo [3,4-c]pyrrole-1,4-dione (3), and 2,5-bis(trimethylstannyl)thiophene (4) were synthesized. 18,28,51 The syntheses of 3,6-dibromo-9-(4-[2,6-di(pyrid-2-yl) pyrid-4-yl]phenyl)-9H-carbazole (2) and the PTs PDPP, PDPCz21, and PDPCz11 are presented in Scheme 1.…”