Silver nanoparticle decorated ZnO nanorod arrays on AZO films for light absorption enhancement
Silver nanoparticle decorated ZnO nanorod arrays on AZO films for light absorption enhancement
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DOI：
10.1002/pssa.201127480
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发表时间：
2012-02-01
影响因子：
2
通讯作者：
Yu, Jae Su
中科院分区：
文献类型：
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作者：
Ko, Yeong Hwan;Yu, Jae Su
采用湿法化学合成法在铝掺杂氧化锌(AZO)玻璃衬底上制备了银(Ag)纳米颗粒(NP)修饰的氧化锌(NRAS)纳米棒阵列(NRAS)。研究了不同尺寸的银纳米粒子对氧化锌纳米粒子的光学增强作用，并与玻璃衬底上的银粒子进行了比较。通过改变蒸发时间来控制纳米银颗粒的名义尺寸和含量。随着蒸发时间从200℃增加到1000℃，与玻璃衬底上的银相比，沉积在氧化锌纳米粒子表面的小于或类似于50 nm的银纳米粒子的数量增加，这是由于局域表面等离子体共振增强导致光吸收显著增加。然而，在2000年S的长时间蒸发时，由于沉积的纳米银过度团聚，蒸发的银没有出现LSPR峰。在S蒸发次数为200-1000次时，在463-508 nm处观察到了氧化锌纳米粒子与银纳米粒子的共振峰。在S 1000℃蒸发后，获得了94%的峰值吸收。(C)2011年威利-VCH Verlag有限公司，温海姆KGaA
The silver (Ag) nanoparticle (NP) decorated zinc oxide (ZnO) nanorod arrays (NRAs) on aluminum-doped ZnO (AZO) coated glass substrates were fabricated by the wet chemical synthesis of ZnO and a subsequent thermal evaporation of Ag without thermal annealing. The optical properties of ZnO NRAs with different sized Ag NPs were investigated for light absorption enhancement, in comparison with the Ag on glass substrate. The nominal size and the amount of Ag NPs were controlled by changing the evaporation time. As the evaporation time was increased from 200 to 1000 s, the amount of Ag NPs of less than or similar to 50 nm attached to ZnO NRAs was increased, leading to a significant increase of light absorption due to the enhanced localized surface plasmon resonance (LSPR) compared to the Ag on glass substrate. However, at a long evaporation time of 2000 s, the evaporated Ag did not exhibit the peak of LSPR because the deposited Ag NPs become excessively agglomerated. At evaporation times of 200-1000 s, the resonance peaks of the ZnO NRAs with Ag NPs were observed at lambda similar to 463-508 nm. After evaporating at 1000 s, the peak absorptance of 94% was achieved. (c) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim