High-performance ternary solar cells by introducing a medium bandgap acceptor with complementary absorption, reducing energy disorder and enhancing glass transition temperature

Abstract

Owing to the relentless march of technology of non-fullerene acceptors (NFAs), ternary organic solar cells (TOSCs) are demonstrating expressive power conversion efficiencies (PCEs). More efficient boosting needs to be achieved...

Structurally Complementary Star‐Shaped Unfused Ring Electron Acceptors with Simultaneously Enhanced Device Parameters for Ternary Organic Solar Cells

“…As shown in Figure S20, Supporting Information, all the blends of Y6: H 1–3 exhibit new endothermic peaks at 291.5, 292.6, and 290.6 °C respectively, which are different from those of separate Y6 and H 1–3, and imply the formation of the alloy‐like phase in the Y6: H s blends. [ 47,48 ] Such an alloy‐like phase formation allows PM6:Y6: H s BHJs to take advantage of the high‐lying LUMO levels of H 1–3, and accounts for the improved V OC of the ternary devices. To further reveal the miscibility between donors and acceptors, the water and glycerol (GL) contact angles (CA) were tested and the results are shown in Figure S21 and Table S4, Supporting Information.…”

An alloy small molecule acceptor for green printing organic solar cells overcoming the scaling lag of efficiency

“…26 In addition to these, a ternary strategy can further improve the glass transition temperature of the BHJ binary system, thus promoting the improvement of its operation stability. 27 These findings show that, notwithstanding the difficulties involved, carefully selecting the guest materials presents a fantastic opportunity to increase the device performance and close the OSC efficiency-stability gap.…”

An over 16% efficiency organic solar cell enabled by a low-cost pyrazine-based polymer donor

“…At room temperature, the hole mobility of PPz-T was 2.11 × 10 −4 cm −2 V −1 S −1 , which was higher than that of PPz (8.10 × 10 −5 cm −2 V −1 S −1 ). Based on the Gaussian disorder model (GDM), 38,39 the electronic states of hole transport were further investigated, where the hole mobilities of both polymer lms presented a downward trend as the temperature decreased, but the rate at which the hole mobility of PPz decreased was evidently larger than that of PPz-T. The energy disorder (s) values were calculated as 78 and 61 meV, respectively, which implied that fewer trap states existed in the PPz-T lm than PPz.…”