Nature Communications · 2025 · 40 citations · 38 references
EngineeringMaterials EngineeringMaterials ScienceOptoelectronicsSemiconductor DevicesSemiconductor MaterialsNanoelectronicsNanowiresPhotodetectorsPhotoelectrochemical MaterialsPhotoelectrochemistrySemiconductor NanomaterialsAuger RecombinationBuilt-in PotentialExciton StatesExcitonsNanowire PhotodetectorsPhotodetectionPhotoelectrochemical CellsQuantum Efficiency
Abstract The self-powered photoelectrochemical components themselves featured advancements in operating independently without external supply. Ultimately, due to lack of assistance from the external bias, the photoelectrochemical response is commonly restricted by the deficient photo-quantum efficiency for the absence of carrier multiplication. This work demonstrates a self-powered photoelectrochemical photodetector based on CuO x /AlGaN nanowires with staggered band structure and enhanced built-in potential for efficient exciton extraction. The generated multiple excitons within reach-through CuO x layer could be speedily separated before Auger recombination. This yields a 131.5% external quantum efficiency and 270.6 mA W −1 responsivity at 255 nm. The work confirms the role of multiple exciton generation in photoelectrochemical systems, offering a solution on paving path of advance for self-powered optoelectronics and weak-light UV imaging applications.
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Arthur J. Nozik · Physica E Low-dimensional Systems and Nanostructures · 2002 · 2.6K citations
Arthur J. Nozik · Annual Review of Physical Chemistry · 2001 · 768 citations
Bidirectional photocurrent in p–n heterojunction nanowires
Danhao Wang, Xin Liu, Yang Kang et al. · Nature Electronics · 2021 · 320 citations