A spirobifluorene and diketopyrrolopyrrole moieties based non-fullerene acceptor for efficient and thermally stable polymer solar cells with high open-circuit voltage

Abstract

A PCE of 5.16% with a Voc of 1.14 V is achieved with thermally stable P3HT : SF(DPPB)4 solar cells.

Reducing the efficiency–stability–cost gap of organic photovoltaics with highly efficient and stable small molecule acceptor ternary solar cells

“…11 These results have revived interest in the use of P3HT for high performing devices and non-fullerene acceptors. [12][13][14][15][16][17][18] The combination of stability, cost and performance for P3HT:NFA devices, make them a compelling choice for commercialization of OPV compared to devices using fullerenes, for which the high costs and energy involved are prohibitive for large scale production.…”

“…11 These results have revived interest in the use of P3HT for high performing devices and non-fullerene acceptors. [12][13][14][15][16][17][18] The combination of stability, cost and performance for P3HT:NFA devices, make them a compelling choice for commercialization of OPV compared to devices using fullerenes, for which the high costs and energy involved are prohibitive for large scale production.Recently, multi-component heterojunctions (ternary or more) have emerged as a promising strategy to overcome the power conversion efficiency (PCE) bottleneck associated with binary bulk-heterojunction (BHJ) solar cells. 3,4,[19][20][21][22][23]24 However, simultaneous increase in the Voc, Jsc and FF is a challenge in the ternary approach because of the trade-off between photocurrent and voltage.…”

Electron-Rich 4-Substituted Spirobifluorenes: Toward a New Family of High Triplet Energy Host Materials for High-Efficiency Green and Sky Blue Phosphorescent OLEDs

“…[22][23][24][25][26][27] The very high performances obtained with some SBF based semi-conductors have hence turned spiroconfigured compounds as one of the most important family of compounds for electronics. 2-Substituted SBFs (see carbons labelling in Chart 1) are in this context the most developed class of SBF-based materials, the para linkage between the pendant substituent in position 2 and the constituted phenyl ring of the fluorene ensuring a good delocalization of π-electrons.…”

Asymmetric indenothiophene-based non-fullerene acceptors for efficient polymer solar cells

“…To date, most of the successful NFAs are derived from strong electron deficient units, such as aromatic diimides (perylene diimides, naphthalene diimides, etc.) [9][10][11][12][13][14][15][16][17], dicyanovinyl [18][19][20], diketopyrrolopyrrole [21,22], and benzothiadiazole [23,24]. Among them, rod-like acceptordonor-acceptor (A-D-A) structured molecules in which an electron-rich fused-ring core is used as a central donor and two strong electron-withdrawing groups are used as acceptors, are promising for high performance OSCs because their optical and electronic properties can be easily tuned by varying the fused-ring core or the terminal groups, in comparison with those of fullerene-based electron acceptors or aromatic diimide-based NFAs [25][26][27][28][29][30][31][32][33].…”