Organic photovoltaic nanoparticles, with their tunable light absorption and exceptional charge dynamics, have shown promising potential for solar-driven hydrogen evolution. However, the interplay between exciton dissociation and charge transport in these systems remains poorly understood, limiting the efficiency of energy conversion. Here, we reinterpret this challenge using size/composition-tunable PM6:Y6 nanoparticles synthesized via a miniemulsion method. The PM6:Y6 heterojunction, featuring strong visible-light absorption and type-II energy level alignment, effectively facilitates exciton dissociation and charge separation, as evidenced by pronounced photoluminescence quenching and size-dependent transient fluorescence decay. Notably, nanoparticles with an optimized diameter of 63.9 nm exhibited the highest hydrogen evolution rate (110.13 ± 39.25 mmol g−1 h−1) and enhanced photocurrent density, attributed to an optimal balance between donor–acceptor interfacial area and charge transport pathways. Our findings reveal that both nanoparticle size and internal phase distribution critically influence photocatalytic performance, with smaller particles favoring short charge transport distance and larger particles benefiting from phase uniformity. This work establishes a comprehensive structure–property relationship that paves the way for the rational design of organic photovoltaic catalysts for efficient solar-to-hydrogen conversion.
Luobin She,Chuankai Zou,Kaihang Yang,Xiaomin Kang,Lin Chen,Jing Tang,Zhenye Li
All-polymer solar cells (all-PSCs) demonstrate splendid advantages of thermal and mechanical stability. Nevertheless, the rock-ribbed trade-off between the crystallinity and phase separation scale of donor/acceptor (D/A) hinder the power conversion efficiency (PCE) improvement of all-PSCs. Here, a novel two-dimensional transition-metal phosphorus trichalcogenides (TMPTCs) namely Cd 0.85 PS 3 Li 0.3 is intelligently designed and synthesized, and firstly employed as a nanoparticle dopant for PBDB-T:N2200-based all-PSCs. The two-dimensional Cd 0.85 PS 3 Li 0.3 possess enormous surface area that can serve as the nucleation center, inducing the crystallinity of D/A without influencing the original phase separation. Such feature significantly boosted the charge transport, PCE (from 7.18% to 8.79%) and stability of PBDB-T:N2200-based device. Moreover, the Cd 0.85 PS 3 Li 0.3 nanoparticle dopant was proved to be universal in non-fullerene small molecule acceptor (NFSMA)-based organic solar cells (OSCs), for which the PCE was boosted from 15.05% to 17.27% for PM6:L8-BO-based OSCs and from 17.29% to 19.10% for D18:L8-BO-based OSCs. These observations exemplify the significance of two-dimensional TMPTCs nanoparticle dopant as a tool for breaking the rock-ribbed trade-off between the crystallinity and phase separation scale of D/A in OSCs, which may open up a special field for making two-dimensional TMPTCs work in a unprecedented way in OSCs.
危险品化学品经营许可证（带存储）