| 张晓蕾,谢文彬,张洁.大面积多壁碳纳米管薄膜光电响应实验[J].光电子激光,2014,(11):2090~2094 |
| 大面积多壁碳纳米管薄膜光电响应实验 |
| Experimental research for the photoresponse of large area multi-walled carbon n anotube films |
| 投稿时间：2014-05-28 |
| DOI： |
| 中文关键词: 多壁碳纳米管(MWNTs) 光电流 光热电效应 |
| 英文关键词:multi-walled carbon nanotubes (MWNTs) photocurrent photo-thermo-electric ef fect |
| 基金项目:国家自然科学基金(61376121)、重庆市自然科学基金(CSTC 2011BB2076)和中央高校项目(106112013CDJZR,125502,20003,20008)资助项目 (重庆大学 光电工程学院光电技术与系统教育部重点实验室,重庆 400044) |
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| 中文摘要: |
| 为了研究大面积多壁碳纳米管(MWNTs)的光电响应特性,利用剥离技术和旋涂法制备了大 面积MWNTs薄膜器件；采用532nm激光作为激励光源,当激光照射薄 膜器件不同位置时,测试其光电流和光电 压。实验结果表明,激光诱导产生的光电流/电压与光照位置有关,当光照位置在器件两端 时,光电流、光电压 最大,两端的光电流分别为0.04μA、－0.06μA和光电压分别为0.04mV、－0.06mV； 当激光照射在器件几 何中心时,光电流、光电压趋于0。分析表明,光热电效应是光电流、电压产生和变化的主 要原因。 |
| 英文摘要: |
| In order to study the photoresponse of large area multi-walled carbon nanotubes(MWNTs),the large area multi-walled carbon nanotube films are obtained by stripping technique and spi n coating.A laser with wavelength of 532nm is used as irradiating light source.The photocurrent/volt age under the condition of different laser spot locations is observed.The experimental results indicate that the p hotocurrent/voltage is related to the laser illumination location.A maximum photocurrent/voltage occurs when la ser illumination is far away from the geometric center (contact regions of metal electrode and CNT films ),and the photocurrents of the two sides are 0.04μA and －0.06μA,the photovoltages are 0.04m V and －0.06mV,respectively.A value of nearly zero occurs when laser illuminates the geometric center of the films.Theoretical analysis suggests that the photo-thermo-electric effect is the main contributi on to the photocurrent/voltage. |
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