Imprinting of nanoporosity in lithium-doped nickel oxide through the use of sacrificial zinc oxide nanotemplates

Imprinting of nanoporosity in lithium-doped nickel oxide through the use of sacrificial zinc oxide nanotemplates
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通过使用牺牲氧化锌纳米模板在锂掺杂氧化镍中压印纳米孔隙

DOI:
10.1117/12.2263713
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发表时间:
2017
期刊:
SPIE Proceedings
影响因子:
--
通讯作者:
Razeghi, Manijeh
Razeghi, Manijeh
中科院分区:
--
文献类型:
--
作者:
Teherani, Ferechteh H.;Look, David C.;Rogers, David J.;Sandana, Vinod E.;Rogers, David J.;Teherani, Ferechteh H.;Bove, Philippe;McClintock, Ryan;Razeghi, Manijeh

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研究了同时提高脉冲激光沉积(PLD)法制备的NiO层的电导率和孔隙率的方法,以开发用于p-DSSC应用的改进型光电阴极。通过PLD在c-Al_2 O_3上生长的NiO:Li(20at%)层的电导率随着衬底温度的升高而急剧下降。在室温下生长的层比未掺杂的NiO层的导电性高两个数量级以上,但在扫描电子显微镜(SEM)图像中没有显示出任何孔隙率的证据。提出了一种基于纳米ZnO牺牲模板在NiO中形成纳米孔隙的新方法。SEM图像和EDX光谱表明,一个纳米多孔形态已被印在NiO覆盖层后,优先化学蚀刻掉的纳米结构的ZnO底层。除了p-DSSC应用之外,这种新工艺可能代表了在整个材料范围内压印多孔性的新范例。
Methods for simultaneously increasing the conductivity and the porosity of NiO layers grown by pulsed laser deposition (PLD) were investigated in order to develop improved photocathodes for p-DSSC applications. NiO: Li (20at%) layers grown on c-Al2O3 by PLD showed a sharp drop in conductivity with increasing substrate temperature. Layers grown at room temperature were more than two orders of magnitude more conductive than undoped NiO layers but did not show evidence of any porosity in Scanning Electron Microscope (SEM) images. A new method for imposing a nanoporosity in NiO was developed based on a sacrificial template of nanostructured ZnO. SEM images and EDX spectroscopy showed that a nanoporous morphology had been imprinted in the NiO overlayer after preferential chemical etching away of the nanostructured ZnO underlayer. Beyond p-DSSC applications, this new process could represent a new paradigm for imprinting porosity in a whole range of materials.
使用脉冲激光沉积、金属有机化学气相沉积和物理气相传输生长的 ZnO 纳米结构的比较
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