Over 17.5% efficiency ternary organic solar cells with enhanced photon utilization via a medium band gap non-fullerene acceptor

Abstract

The light harvesting and photocurrent generation from acceptors largely determine the photovoltaic performance of organic solar cells (OSCs). We have designed and prepared two medium band gap non-fullerene acceptors (NFAs),...

Stable dinitrile end-capped closed-shell non-quinodimethane as a donor, an acceptor and an additive for organic solar cells

“…1e) because of the weaker electron withdrawing ability of the ending group, which leads to an attenuated intramolecular charge transfer interaction. 64 In addition, the absorption of YF-CN exhibits a partial overlap with the absorption of PCE10. Therefore, compared with the absorption position of PCE10:Y6, the introduction of the third component YF-CN partially replacing PCE10 does not change the light absorption obviously in the ternary PCE10:YF-CN:Y6 blend films (Fig.…”

An acceptor with an asymmetric and extended conjugated backbone for high-efficiency organic solar cells with low nonradiative energy loss

“…As one of the most successful acceptors, Y6 has a unique banana-like conguration, which enables it to form an intense threedimensional (3D) framework with efficient charge transport channels and achieves a PCE of around 16% for binary devices with E loss $ 0.55 eV and nonradiative loss $0.22 eV. 6,49 To further improve device efficiencies, many studies have been conducted on the structural modication of Y6 on the side chains, 48,[50][51][52][53] end groups, [54][55][56][57][58] and molecular backbones. [59][60][61][62][63][64] With the structural modications, the molecular absorptions, energy levels and packing modes can be nely tuned, and corresponding devices with improved efficiencies over 19% have been achieved.…”

Improving charge transport and reducing non-radiative energy loss via a nonacyclic carbazole-based third component for over 18% efficiency polymer solar cells

“…Versatile NFAs developed in recent years provide plentiful options for the selection of the third component, and many cases have been reported for achieving significantly enhanced performance compared to the host binary systems. 15–22…”

“…Versatile NFAs developed in recent years provide plentiful options for the selection of the third component, and many cases have been reported for achieving signicantly enhanced performance compared to the host binary systems. [15][16][17][18][19][20][21][22] A NFA named BTP-4F (also known as Y6) and a series of its derivatives have been developed since 2019, continuous breakthroughs in the PCE have been made based on these NFAs. 3,[23][24][25] To realize better device performance, ternary strategies have been adopted in host binary blends with BTPseries NFAs.…”