Organic sensitizers featuring 9H-thieno[2′,3':4,5]thieno[3,2-b]thieno[2′,3':4,5]thieno[2,3-d]pyrrole core for high performance dye-sensitized solar cells

Advanced Acceptor‐Substituted S,N‐Heteropentacenes for Application in Organic Solar Cells

“…Monodisperse co‐oligomeric SN5’ derivatives of the D‐A type were synthesized for application in dye‐sensitized solar cells. The insertion of a SN5’ unit into D‐A systems such as in oligomer C (Figure 3) led to enhanced absorption and hence to higher short‐circuit current density and power conversion efficiency (PCE=9.4 %) in the dye‐sensitized solar cell [24] . SN5’ derivatives of the A‐D‐A type, in which the electron‐rich SN5’ core is end‐capped by electron‐withdrawing units, were successfully implemented into solution‐processed BHJ‐OSCs.…”

“…The insertion of a SN5’ unit into D‐A systems such as in oligomer C (Figure 3 ) led to enhanced absorption and hence to higher short‐circuit current density and power conversion efficiency (PCE=9.4 %) in the dye‐sensitized solar cell. [24] SN5’ derivatives of the A‐D‐A type, in which the electron‐rich SN5’ core is end‐capped by electron‐withdrawing units, were successfully implemented into solution‐processed BHJ‐OSCs. For example in co‐oligomeric donor D , the SN5’ block is connected to diketopyrrolopyrrole acceptor moieties (Figure 3 ) leading to a PCE of 3.8 % in BHJ‐OSCs when blended with fullerene PC 71 BM.…”

Effect of the Spatial Configuration of Donors on the Photovoltaic Performance of Double D−π–A Organic Dyes

“…To date, numerous sensitizers featuring a donor−π spacer–acceptor (D-π–A) skeleton have been explored for DSSCs, showing promising performance. − However, the open-circuit voltage of D−π–A framework sensitizers is affected by the inherent interaction between electrolytes and dyes and still lags behind that of metal complex dyes. , Many efforts have been focused on the modification of the donor units in the dye molecule to break the dilemma. − One strategy is to construct sensitizers with a D–D−π–A framework by incorporating additional donor units. − The triphenylamine unit and its derivatives possess excellent electron-donating ability and nonplanar molecular configuration, which are commonly utilized as the donor unit. − For instance, the cone-shaped dye D7 obtained higher V OC values compared to the congener D−π–A dye D5 (Figure ). The later report revealed that the dye D1 obtained a higher V OC than D7 because of the prolonged conjugation units and twist molecule configuration.…”

Organic double D–π–A sensitizers based on 2,2′-(2,2 diphenylethene-1,1-diyl)dithiophene: π-conjugation fragment effect on the photovoltaic properties

“…Among various dyes, 12,13 metal-free photosensitizers also aroused researchers' great interest due to the flexible molecular design, high molar extinction coefficients, and cost-effectiveness. In addition to the donor-π-acceptor (D-π-A) featured sensitizers, 14 more types of dyes have been developed to seek ideal sensitizers with the characteristic of aggregationresistant and strong absorption. Recently, some studies have found that the di-anchoring dyes 15,16 have a stronger affinity to photoanodes, are more stable than the corresponding mono-anchored dyes, and can provide more electron injection pathways.…”