Photocatalysts formed from a single organic semiconductor typically suffer from inefficient intrinsic charge generation, which leads to low photocatalytic activities. We demonstrate that incorporating a heterojunction between a donor polymer (PTB7-Th) and non-fullerene acceptor (EH-IDTBR) in organic nanoparticles (NPs) can result in hydrogen evolution photocatalysts with greatly enhanced photocatalytic activity. Control of the nanomorphology of these NPs was achieved by varying the stabilizing surfactant employed during NP fabrication, converting it from a core–shell structure to an intermixed donor/acceptor blend and increasing H₂ evolution by an order of magnitude. The resulting photocatalysts display an unprecedentedly high H₂ evolution rate of over 60,000 µmol h⁻¹ g⁻¹ under 350 to 800 nm illumination, and external quantum efficiencies over 6% in the region of maximum solar photon flux.

由单一有机半导体形成的光催化剂通常会产生低效的本征电荷，从而导致光催化活性低。我们证明，在有机纳米颗粒（NP）中加入供体聚合物（PTB7-Th）和非富勒烯受体（EH-IDTBR）之间的异质结可以产生析氢光催化剂，其光催化活性大大增强。这些纳米颗粒的纳米形态控制是通过改变纳米颗粒制造过程中使用的稳定表面活性剂、将其从核壳结构转变为混合的供体/受体混合物并将H ₂释放增加一个数量级来实现的。所得光催化剂在350至800 nm照明下表现出前所未有的高H ₂演化速率，超过60,000 µmol h ^-1  g ^-1，并且在最大太阳光子通量区域内外量子效率超过6%。