Within this work, it is studied the photo-thermionic and photocurrent behavior of two kinds of carbon nanotube arrays, grown by chemical vapor deposition. One kind is fabricated by using a co-catalyst bilayer approach and other by a catalyst-free route by using a porous alumina membrane as a template. The carbon nanotubes fabricated by both approaches exhibit low crystallinity. To compute the thermal properties of the nanomaterials, a photothermal experiment was measured at 1064 nm wavelength, and numerical simulations were conducted to analyze the photo-thermionic emission dynamics. The high absorbance of the carbon nanotubes leads to reach temperatures above 1500 K, with time response in the millisecond order and emission currents in the nanoampere range. On the other hand, the photodetector behavior was confirmed by a single pulse experiment that induces fast photocurrent recognition associated to a photodiode. Our results highlighted the coexistence of stable states related to high-power and high-speed electronic conversion energy dependent on the growth mechanism of carbon nanotubes.

在这项工作中，研究了通过化学气相沉积法生长的两种碳纳米管阵列的光热敏和光电流行为。一种是通过使用助催化剂双层方法制造的，另一种是通过使用多孔氧化铝膜作为模板通过无催化剂的途径制造的。通过两种方法制造的碳纳米管均显示出低结晶度。为了计算纳米材料的热性能，在1064 nm波长处进行了光热实验，并进行了数值模拟以分析光热电子发射动力学。碳纳米管的高吸收率导致温度达到1500 K以上，时间响应以毫秒为单位，发射电流在纳安范围内。另一方面，单脉冲实验证实了光电探测器的行为，该实验引发了与光电二极管相关的快速光电流识别。我们的结果强调了依赖于碳纳米管生长机制的与高功率和高速电子转换能量相关的稳定状态的共存。