A minimal benzo[c][1,2,5]thiadiazole-based electron acceptor as a third component material for ternary polymer solar cells with efficiencies exceeding 16.0%

Abstract

A simple small molecule of BTF is used as a third component in the binary blends of J71:ITIC and PM6:Y6 to achieve efficient ternary polymer solar cells with enhanced PCEs of 12.35% and 16.53%, respectively.

Over 15.7% Efficiency of Ternary Organic Solar Cells by Employing Two Compatible Acceptors with Similar LUMO Levels

“…Recently, rapid progress in bulk heterojunction organic solar cells (OSCs) have been achieved due to the advances in new materials and device engineering. [ 1–7 ] It is well known that the sufficient photon harvesting is prerequisite to obtain efficient OSCs. [ 8,9 ] In fact, organic semiconducting materials have a relatively narrow photon harvesting range with full width at half maximum about 100 nm, leading to the limited photon harvesting of active layers containing one donor material and one acceptor material.…”

Secondary Bonds Modifying Conjugate‐Blocked Linkages of Biomass‐Derived Lignin to Form Electron Transfer 3D Networks for Efficiency Exceeding 16% Nonfullerene Organic Solar Cells

“…Nonfullerene acceptors (NFAs) organic solar cells (OSCs) have been attracting extensive investigation in the past few years owing to the advantages of their tunable energy levels, regulated region of absorption, high absorptive coefficient, and adjustably molecular structures. [ 1–6 ] So far, the champion power conversion efficiencies (PCEs) of single‐junction and tandem NFAs‐OSCs approach 17.4% and 17.3% with optimized devices, as well as in‐depth understanding on the interfacial modification. [ 7,8 ] However, the traditional interfacial materials, working effectively for fullerene based OSCs, are ineffective for the NFAs‐OSCs due to the impeded electron transfer in all directions of NFAs' conformational anisotropy.…”

Phthalimide Polymer Donor Guests Enable over 17% Efficient Organic Solar Cells via Parallel‐Like Ternary and Quaternary Strategies

“…The recent great progress made on organic solar cells (OSCs) after using nonfullerene small molecules as electron acceptor materials is painting bright pictures of future orbital (LUMO) levels are higher than the LUMO of hosts or by adding donor guests whose highest occupied molecular orbital (HOMO) levels are lower-lying than the HOMO of hosts, both aiming to increase V oc . [22][23][24] Although increased J sc or V oc can be obtained with the absorption complementary or V oc -increased strategies, success in designing ternary material systems with increased PCEs is however largely dependent on structures of the third components. [25][26][27][28][29] Conjugated small molecules have rigid backbones and have strong ππ-interactions and favorable entropic force to interact and mix with the host polymer or small-molecule donor/acceptors, by which alloy-like phase can be formed between the guest and host components.…”