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The transfer of charge carriers photogenerated in ZnO nanoparticles into a single ZnO nanowire

机译:在ZnO纳米粒子中光生的电荷载流子转移到一条ZnO纳米线中

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The transfer of charge carriers, photogenerated in nanoparticles (NPs), into a single nanowire (NW) is demonstrated in this study by conducting a careful comparison of the optoelectronic characteristics of a ZnO NW with ZnO NPs attached to its surface, a bare ZnO NW and a film of close-packed ZnO NPs. Under the illumination of an above-gap light, the photocurrent taken from the NW with the NPs is remarkably higher in magnitude than that obtained from the bare NW, although the photocurrent is substantially lower for the close-packed NPs. The presence of the absorption band of the NPs in the photoresponse spectrum taken from the NW with the NPs reveals that the transfer of the charge carriers photogenerated in the NPs into the NW dramatically enhances the magnitude of the photocurrent flowing in this NW. Nevertheless, during the transfer, the charge carriers experience trapping and detrapping at the interfaces of the NPs and the NW.
机译:通过仔细比较ZnO NW和附着在其表面上的ZnO NPs(裸露的ZnO NW)的ZnO NW的光电特性,证明了将在纳米颗粒(NPs)中光生的电荷载流子转移到单个纳米线(NW)中。以及紧密堆积的ZnO NP薄膜。在间隙以上的光的照射下,尽管紧密封装的NPs的光电流明显较低,但是从NP的NW采集的光电流的幅度明显高于裸NW的光电流。从具有Np的NW采集的光响应光谱中NPs的吸收带的存在表明,在NPs中光生化的电荷载流子向NW的转移显着增强了在NW中流动的光电流的大小。但是,在传输过程中,电荷载流子在NP和NW的界面处会发生陷获和解陷。

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