Reducing Limitations of Aggregation‐Induced Photocarrier Trapping for Photovoltaic Stability via Tailoring Intermolecular Electron–Phonon Coupling in Highly Efficient Quaternary Polymer Solar Cells (Adv. Energy Mater. 6/2022)

A Facilely Synthesized NiCo2S4 with Two Mutually Reinforcing Active Sites for High-Performance Lithium–Sulfur Batteries

“…The crystal defects in the lamellar structure create additional active sites on the surface of D-NiCo 2 S 4 . These active sites provide more sites for the adsorption and catalysis of polysulfides, allowing for more efficient redox reactions. − The disordered structures are expected to provide trapping sites for charge carriers and interfere with their rapid recombination to reduce the resistance to charge transfer and improve the electron transfer efficiency. This enhanced charge transfer contributes to the improved redox reaction kinetics of polysulfides. − The element mappings (Figure g) suggest that the distributions of Ni, Co, and S are homogeneously dispersed throughout the structures, which demonstrate that the as-prepared D-NiCo 2 S 4 is beneficial to the absorption and uniform distribution of sulfur.…”

Improving the Stability of Organic Solar Cells: From Materials to Devices

“…[ 165 ] Recently, it has been demonstrated that the quaternary strategy can also be applied to improve the stability of Y6‐derivative‐based OSCs. [ 166–168 ]…”

“…As exhibited in Figure , Zhang et al incorporated DRTB‐T‐C4 and IDIC [ 169 ] as guest components in PM6:BTP‐eC9 devices and performed transient absorption spectra (TAS) to study the effect of guest components on the stability of OSCs. [ 166 ] In quaternary devices, the guest components can stabilize the intermolecular electron–phonon coupling by tuning the molecular stacking and suppressing the aggregation of NFAs. This helped inhibit photocarrier trapping by deep‐trap states to result in enhanced device performance and lifetime.…”

“…In addition, amorphous alloys are also promising candidates to replace crystalline metal electrodes for improving the stability of devices. Due to no grain boundaries to act as chemically active sites in the amorphous alloys, [ 166 ] their application as electrodes will improve the device stability. Cho et al fabricated a binary alloy of Al and samarium (Sm), [ 171 ] which showed strong resistance against oxidation to replace the crystalline Al electrode.…”

Organic Photovoltaic Stability: Understanding the Role of Engineering Exciton and Charge Carrier Dynamics from Recent Progress

“…Regarding the kinetic aggregation of NFAs under nonequilibrium conditions, Hao group [ 160 ] proposed a photophysical correlation picture between intermolecular electron–phonon coupling and trapping of electronic excitation in PM6:BTP‐eC9‐based bulk‐heterojunction and layer‐by‐layer processed quaternary OSCs. Herein, temperature‐dependent steady‐state PL bandwidths and time‐resolved terahertz spectroscopy were employed to visualize the evolution of electron‐phonon coupling and polaron dynamics, respectively.…”