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- W3123973103 abstract "Abstract Capacitive charge transfer at the electrode/electrolyte interface is a biocompatible mechanism for the stimulation of neurons. Although quantum dots showed their potential for photostimulation device architectures, dominant photoelectrochemical charge transfer combined with heavy-metal content in such architectures hinders their safe use. In this study, we demonstrate heavy-metal-free quantum dot-based nano-heterojunction devices that generate capacitive photoresponse. For that, we formed a novel form of nano-heterojunctions using type-II InP/ZnO/ZnS core/shell/shell quantum dot as the donor and a fullerene derivative of PCBM as the electron acceptor. The reduced electron–hole wavefunction overlap of 0.52 due to type-II band alignment of the quantum dot and the passivation of the trap states indicated by the high photoluminescence quantum yield of 70% led to the domination of photoinduced capacitive charge transfer at an optimum donor–acceptor ratio. This study paves the way toward safe and efficient nanoengineered quantum dot-based next-generation photostimulation devices." @default.
- W3123973103 created "2021-02-01" @default.
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- W3123973103 date "2021-01-28" @default.
- W3123973103 modified "2023-10-17" @default.
- W3123973103 title "Quantum dot and electron acceptor nano-heterojunction for photo-induced capacitive charge-transfer" @default.
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- W3123973103 doi "https://doi.org/10.1038/s41598-021-82081-y" @default.
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