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Highly efficient and stable Si nanowires array embedded into transparent polymer for visible light photoelectrochemical cell

机译:嵌入透明聚合物中的高效稳定的Si纳米线阵列,用于可见光光电化学电池

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Photoelectrochemical (PEC) cell supports a renewable method for solving current environmental and energy issues by combining solar energy collection and photocatalysis in a single semiconductor photoelectrode. However, it is still challenged by visible light photoelectrodes. The present work reports fabricating highly efficient and stable Si nanowires (SiNWs) array as visible light photoelectrodes. It involves embedding SiNWs arrays into a transparent polymer substrate to build an axial carrier collection geometry. We demonstrated that this strategy could significantly strengthen the chemical stability of SiNWs by largely reducing their surface area. Moreover, this device structure can also enhance visible light absorption efficiency through taking advantage of the highly crystalline structure of vapor–liquid–solid (VLS) grown SiNWs. Thus it can double the photodegradation ability of SiNWs.
机译:光电化学(PEC)电池通过在单个半导体光电极中结合太阳能收集和光催化作用来支持解决当前环境和能源问题的可再生方法。然而,它仍然受到可见光光电电极的挑战。本工作报告制造高效和稳定的Si纳米线(SiNWs)阵列作为可见光光电电极。它涉及将SiNWs阵列嵌入到透明的聚合物衬底中以建立轴向载流子收集几何形状。我们证明了该策略可以通过大大减小SiNW的表面积来显着增强其化学稳定性。此外,这种器件结构还可以利用汽-液-固(VLS)生长的SiNW的高度结晶结构来提高可见光吸收效率。因此,它可以使SiNW的光降解能力提高一倍。

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