A 1,8-naphthalimide based small molecular acceptor for polymer solar cells with high open circuit voltage

Abstract

A PCE of 2.01% with a Voc of 1.30 V was obtained from polymer solar cells based on a 1,8-naphthalimide based small molecular acceptor, which was synthesized via direct C–H activation.

Perfluoroalkyl-substituted conjugated polymers as electron acceptors for all-polymer solar cells: the effect of diiodoperfluoroalkane additives

“…There has been increasing interest in non-fullerene conjugated materials to replace fullerene derivatives as electron acceptors in organic solar cells in recent years. [1][2][3] A signicant number of conjugated small molecules [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] and polymers [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] with excellent electron transport properties and aligned energy levels have been designed and synthesized, which are well-suited as electron acceptors in organic photovoltaic devices. Currently, perylenediimide and naphthalenediimide based materials are considered as the most promising non-fullerene acceptors, 36,37 since these materials have shown high electron mobilities of about 1 cm 2 V À1 s À1 (ref.…”

Reducing the Nano-Scale Aggregation of Perylene Diimide Based Acceptor by Conjugating a Bridge with a Large Volume

“…To shed light on the film morphology of PTB7-Th:P-PDI blend films, atomic force microscopy (AFM) was used in the tapping mode. As shown in Figure 4a, the blend film displays a pretty smooth film with a root mean square (RMS) roughness of 1.21 nm, demonstrating that no significant aggregates of P-PDI were formed in the blend films [27]. To further investigate the inside film morphology of the active layer, scanning electron microscope (SEM) and transmission electron microscopy (TEM) were also adopted.…”

Utilizing Benzotriazole and Indacenodithiophene Units to Construct Both Polymeric Donor and Small Molecular Acceptors to Realize Organic Solar Cells With High Open-Circuit Voltages Beyond 1.2 V

“…Recently, by developing novel NFSMAs with high LUMO levels and choosing suitable p-type polymers, the resulted solar cells could realize high V OC values of beyond 1.0 V (Yang et al, 2014 ; Yu et al, 2014 ; Zhang et al, 2015 , 2016 ; Baran et al, 2016 ; Fu et al, 2016 ; Li et al, 2016a ; Liu et al, 2016 ; Ni et al, 2016 ; Chen et al, 2017 ; Ding et al, 2017 ; Xiao B. et al, 2017a ; Zhan et al, 2017 ; Zhang Y. et al, 2017 ). In fact, there is always a problematic trade-off between J SC and V OC .…”