A wide-bandgap copolymer donor with a 5-methyl-4H-dithieno[3,2-e:2',3'-g]isoindole-4,6(5H)-dione unit

Wide-bandgap polymer donors for non-fullerene organic solar cells

“…For example, Zhang et al fabricated semitransparent cells based on D18:N3 with a PCE of 12.91% and an Table 1 The optical bandgaps and HOMO/LUMO energy levels of PBDB-T series polymers and the photovoltaic parameters of the corresponding devices Table 2 The optical bandgaps and HOMO/LUMO energy levels of D18 series polymers and the photovoltaic parameters of the corresponding devices decent PCEs of 14.52% and 15.64% for the P1:N3 and P2:Y6 cells, respectively. 34,35 Some D18 derivatives have also been reported by other groups. In 2021, Huang et al synthesized the D-A copolymer JD40, which can be considered as non-uorinated D18.…”

“…, 5-methyl-4 H -dithieno[3,2- e :2′,3′- g ]isoindole-4,6(5 H )-dione (MDTID) and dithieno[3′,2′:3,4;2′′,3′′:5,6]benzo[1,2- c ][1,2,5]oxadiazole (DTBO), to construct efficient polymers P1 and P2 , achieving decent PCEs of 14.52% and 15.64% for the P1 :N3 and P2 :Y6 cells, respectively. 34,35…”

Dithieno[2,3‐e:3′,2′‐g]isoindole‐7,9(8H)‐Dione and Dithieno[3′,2′:5,6;2″,3″:7,8]naphtho[2,3‐d]imidazol‐9(10H)‐One‐Based Wide Bandgap Copolymer for Efficient Polymer Solar Cells

“…In Scheme 1 , the synthesis process to design the copolymers P133 and P135 is shown. The monomers 4,8‐Bis (5‐(2‐ethylhexyl) thiophen‐2‐yl) benzo [1,2‐b:4,5‐b'] thiophene‐2,6 diyl) bis (trilstmethyannane) M1, [ 40 ] 2,5‐dibromo‐8,10‐bis (2‐octyldodecyl) −8 H‐thieno [3′,2′:5.6;2″,3″:7.8] naphtho [2,3‐d] imidazole‐9 (10 H) ‐one M2, [ 41 ] and 2,5‐Dibromo‐8‐(2‐octyldodecyl)−7 H‐dithieno [2,3‐e:3′, 2′‐g] isoindole‐7, 9 (8H)‐dione M3 [ 42 ] were synthesized as reported in the literature. The P133 and P135 were prepared by conventional Stille cross‐coupling polymerization among M1 and M2 , or M3 , respectively, in the presence of a palladium catalyst Pd (Ph 3 P) 4 in boiling toluene for 48 h in a stream of argon.…”

“…[33,34] Taking the advantages of a fused ring acceptor unit, in this work, we have designed two D-A copolymers using DTID and DTNID fused ring acceptor units and same BDTT donor unit denoted as P135 and P133, respectively. The naphtho-imidazole unit in DTNID [40] and is more electron-withdrawing than thiadiazole. The photovoltaic study of designed copolymers was investigated by constructing a device with ITO/PEDOT:PSS/P133 or P135:Y6/PFN/Al structure.…”

Tradeoff between Intermolecular Interaction and Backbone Disorder by High Molecular Dipole Block for Improving Blend Morphology of Polymer Solar Cells

“…The pyrrolo[3,4-f ]benzotriazole-5,7(6H)-dione (TzBI) group has been explored in a few organic photovoltaic materials with success. [36][37][38] It contains two established electron-withdrawing groups, i.e., a pyrrolidine-2,5-dione [39] and a triazole, [40][41][42] fused to a benzene ring. The double-electron-withdrawing structure provides a handy knob for not only tunning the total electron deficiency, but also introducing dipole moment due to the imbalanced electron effect.…”