ZnO纳米棒/CdS量子点的制备及紫外-可见探测性能研究

胡轶; 胡更新; 张洁静; 桑丹丹; 李易昆; 高世勇

doi:10.3788/CO.20191206.1271

ZnO纳米棒/CdS量子点的制备及紫外-可见探测性能研究

doi: 10.3788/CO.20191206.1271

胡轶^{1, 2,},
胡更新²,
张洁静²,
桑丹丹³,
李易昆²,
高世勇^2, ,

1.
太原学院理化系, 山西太原 030032
2.
哈尔滨工业大学材料科学与工程学院, 黑龙江哈尔滨 150001
3.
聊城大学物理科学与信息工程学院山东省光通信科学与技术重点实验室, 山东聊城 252000

基金项目:

黑龙江省博士后基金资助项目 LBH-Q16104

山东省自然科学基金资助项目 ZR2017QA013

详细信息

作者简介:
胡轶(1982—), 男, 山西太原人, 硕士, 讲师, 2012年于山西大学获得硕士学位, 主要从事低维材料制备与性能方面的研究。E-mail:huyi198281@126.com

高世勇(1980—), 男, 山西大同人, 博士, 硕士生导师, 2010年于吉林大学获得博士学位, 主要从事宽带隙半导体材料与器件方面的研究。E-mail:gaoshiyong@hit.edu.cn

中图分类号: TN36
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出版历程
- 收稿日期: 2019-01-29
- 修回日期: 2019-03-03
- 刊出日期: 2019-12-01

Fabrication of ZnO nanorods/CdS quantum dots and its detection performance in UV-Visible waveband

1.
Department of Physical Chemistry, Taiyuan University, Taiyuan 030032, China
2.
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
3.
School of Physical Science and Information Technology, Shandong Key Laboratory of Optical Communication Science and Technology, Liaocheng University, Liaocheng 252000, China

Funds:

Postdoctoral Science Foundation of Heilongjiang Province LBH-Q16104

Natural Science Foundation of Shandong Province ZR2017QA013

More Information

Corresponding author: GAO Shi-yong, E-mail:gaoshiyong@hit.edu.cn

摘要

摘要: 本文采用水热法在ITO衬底上制备了ZnO纳米棒阵列，然后用化学水浴沉积法在纳米棒上制备CdS量子点。分别利用SEM和XRD对样品形貌和晶体结构进行表征。结果表明，球状的CdS量子点均匀地包覆在ZnO纳米棒表面，且结晶质量较好。基于ZnO纳米棒和ZnO纳米棒/CdS量子点制备的探测器对紫外光都具有很好的响应，然而与ZnO纳米棒探测器相比，ZnO纳米棒/CdS量子点探测器在相同条件下的光电流提高了7倍，为0.52 mA。此外，ZnO纳米棒/CdS量子点探测器对绿光和蓝光也表现出了很好的响应。
- ZnO纳米棒 /
- CdS量子点 /
- 异质结构 /
- 紫外探测 /
- 可见光探测
Abstract: ZnO nanorods were prepared on ITO substrate using the hydrothermal method and then CdS quantum dots were synthesized on the ZnO nanorods with the chemical bath deposition method. The morphologies and crystalline structure of the as-prepared samples were characterized by SEM and XRD, respectively. The results indicated that after the chemical bath deposition, spherical CdS quantum dots were evenly coated on the surface of ZnO nanorods with good crystalline quality. The photodetectors made up of ZnO nanorods and ZnO nanorods/CdS quantum dots showed good response under ultraviolet(UV) irradiation. The photocurrent of ZnO nanorods/CdS quantum dots detector(0.52 mA) was 7 times higher than that of ZnO nanorods. In addition, the photodetector based on ZnO nanorods/CdS quantum dots exhibited good response to green and blue light.
- ZnO nanorods /
- CdS quantum dots /
- heterostructure /
- UV photodetection /
- visible light photodetection

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图 1 ZnO纳米棒(a，b)和ZnO纳米棒/CdS量子点(c，d)的SEM图

Figure 1. SEM images of ZnO nanorods(a, b) and ZnO nanorods/CdS quantum dots(c, d)

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图 2 ZnO纳米棒(a)和ZnO纳米棒/CdS量子点(b)的XRD图谱

Figure 2. XRD patterns of ZnO nanorods(a) and ZnO nanorods/CdS quantum dots(b)

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图 3 ZnO纳米棒探测器和ZnO纳米棒/CdS量子点探测器在紫外光下的Ⅰ-Ⅴ特性曲线

Figure 3. Ⅰ-Ⅴ characteristic curves of ZnO nanorods detector and ZnO nanorods/CdS quantum dots detector under UV illumination

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图 4 ZnO纳米棒探测器和ZnO纳米棒/CdS量子点探测器的光响应图谱

Figure 4. Photoresponse spectra of ZnO nanorods detector and ZnO nanorods/CdS quantum dots detector

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图 5 ZnO纳米棒探测器和ZnO纳米棒/CdS量子点探测器在开/关紫外光下的响应特性曲线

Figure 5. Time dependent current response curves of ZnO nanorods detector and ZnO nanorods/CdS quantum dots detector under on/off UV illumination

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图 6 ZnO纳米棒探测器和ZnO纳米棒/CdS量子点探测器分别在开/关蓝光下的响应特性曲线

Figure 6. Time dependent current response curves of ZnO nanorods detector and ZnO nanorods/CdS quantum dots detector under on/off blue light

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图 7 ZnO纳米棒探测器和ZnO纳米棒/CdS量子点探测器分别在开/关绿光下的响应特性曲线

Figure 7. Time dependent current response curves of ZnO nanorods detector and ZnO nanorods/CdS quantum dots detector under on/off green light

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图 8 ZnO纳米棒和ZnO纳米棒/CdS量子点的PL图谱

Figure 8. PL spectra of ZnO nanorods and ZnO nanorods/CdS quantum dots

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图 9 ZnO纳米棒/CdS量子点在紫外光下(a)和可见光下(b)的探测机理图

Figure 9. Schematic illustration of ZnO nanorods/CdS quantum dots detector under UV(a) and visible light(b)

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