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通过点样法制备具有高光电流密度的Ag2S/CdS/TiO2纳米管阵列薄膜

Ag2S/CdS/TiO2 Nanotube Array Films with High Photocurrent Density by Spotting Sample Method.

作者信息

Sun Hong, Zhao Peini, Zhang Fanjun, Liu Yuliang, Hao Jingcheng

机构信息

Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education, Jinan, 250100, People's Republic of China.

出版信息

Nanoscale Res Lett. 2015 Dec;10(1):382. doi: 10.1186/s11671-015-1089-7. Epub 2015 Oct 1.

DOI:10.1186/s11671-015-1089-7
PMID:26428017
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4591224/
Abstract

Ag2S/CdS/TiO2 hybrid nanotube array films (Ag2S/CdS/TNTs) were prepared by selectively depositing a narrow-gap semiconductor-Ag2S (0.9 eV) quantum dots (QDs)-in the local domain of the CdS/TiO2 nanotube array films by spotting sample method (SSM). The improvement of sunlight absorption ability and photocurrent density of titanium dioxide (TiO2) nanotube array films (TNTs) which were obtained by anodic oxidation method was realized because of modifying semiconductor QDs. The CdS/TNTs, Ag2S/TNTs, and Ag2S/CdS/TNTs fabricated by uniformly depositing the QDs into the TNTs via the successive ionic layer adsorption and reaction (SILAR) method were synthesized, respectively. The X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectrum (XPS) results demonstrated that the Ag2S/CdS/TNTs prepared by SSM and other films were successfully prepared. In comparison with the four films of TNTs, CdS/TNTs, Ag2S/TNTs, and Ag2S/CdS/TNTs by SILAR, the Ag2S/CdS/TNTs prepared by SSM showed much better absorption capability and the highest photocurrent density in UV-vis range (320~800 nm). The cycles of local deposition have great influence on their photoelectric properties. The photocurrent density of Ag2S/CdS/TNTs by SSM with optimum deposition cycles of 6 was about 37 times that of TNTs without modification, demonstrating their great prospective applications in solar energy utilization fields.

摘要

通过点滴样品法（SSM）在CdS/TiO₂纳米管阵列薄膜的局部区域选择性沉积窄带隙半导体Ag₂S（0.9 eV）量子点（QDs），制备了Ag₂S/CdS/TiO₂混合纳米管阵列薄膜（Ag₂S/CdS/TNTs）。由于修饰了半导体量子点，实现了通过阳极氧化法获得的二氧化钛（TiO₂）纳米管阵列薄膜（TNTs）的太阳光吸收能力和光电流密度的提高。分别合成了通过连续离子层吸附和反应（SILAR）法将量子点均匀沉积到TNTs中制备的CdS/TNTs、Ag₂S/TNTs和Ag₂S/CdS/TNTs。X射线粉末衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和X射线光电子能谱（XPS）结果表明，通过SSM制备的Ag₂S/CdS/TNTs和其他薄膜均成功制备。与通过SILAR法制备的TNTs、CdS/TNTs、Ag₂S/TNTs和Ag₂S/CdS/TNTs这四种薄膜相比，通过SSM制备的Ag₂S/CdS/TNTs在紫外-可见范围（320~800 nm）表现出更好的吸收能力和最高的光电流密度。局部沉积的循环次数对其光电性能有很大影响。最佳沉积循环次数为6的通过SSM制备的Ag₂S/CdS/TNTs的光电流密度约为未修饰的TNTs的37倍，表明它们在太阳能利用领域具有巨大的应用前景。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df34/4591224/07fae1c8c62d/11671_2015_1089_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df34/4591224/78e82eae2a3d/11671_2015_1089_Fig1_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df34/4591224/edf3724e09bf/11671_2015_1089_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df34/4591224/af0a4c217f99/11671_2015_1089_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df34/4591224/6e962bbc7ae1/11671_2015_1089_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df34/4591224/3a91fe16a085/11671_2015_1089_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df34/4591224/07fae1c8c62d/11671_2015_1089_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df34/4591224/78e82eae2a3d/11671_2015_1089_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df34/4591224/5769885790e9/11671_2015_1089_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df34/4591224/2d708f7c0401/11671_2015_1089_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df34/4591224/2eb35389fbf6/11671_2015_1089_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df34/4591224/edf3724e09bf/11671_2015_1089_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df34/4591224/af0a4c217f99/11671_2015_1089_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df34/4591224/6e962bbc7ae1/11671_2015_1089_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df34/4591224/3a91fe16a085/11671_2015_1089_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/df34/4591224/07fae1c8c62d/11671_2015_1089_Fig9_HTML.jpg

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