Publication date: 15th December 2025
Recent progress in organic photovoltaic (OPV) technologies has enabled devices to surpass the 20% power conversion efficiency (PCE) mark. However, voltage losses associated with charge-generation across organic donor-acceptor interfaces limit both the achievable PCE of organic solar cells as well as the dark current in organic photodetectors.
Hybrid heterojunctions, where organic semiconductors are combined with inorganic or hybrid semiconductors, have been proposed to mitigate some of the intrinsic limitations of all-organic heterojunctions. Further, they offer the potential to combine the benefits of the two classes of materials, such as the wide optical tunability of organic semiconductors with the high charge-generation yield and good charge transport of inorganic semiconductors. However, photocharge generation across hybrid heterojunctions has previously suffered from poor charge-generation across their interface, limiting their potential.
Here, we investigate photocharge generation and recombination mechanisms across a variety of solution-processed organic/inorganic interfaces, including novel multi-layer architectures that show reduced voltage losses compared to their all-organic heterojunction counterparts. Steady-state photoluminescence (PL), photoluminescence quantum yield (PLQY), and time-resolved photoluminescence (TRPL) measurements are employed to probe energy transfer processes, radiative recombination pathways, and interfacial charge separation.
These results demonstrate that careful engineering of hybrid organic–inorganic architectures can promote more efficient charge separation and reduced radiative losses, highlighting their potential for next-generation OPV devices and photodetectors.
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