Detection of low intensity light down to a few photons requires photodetectors with high gain. A new photodetector is reported based on C₆₀‐sensitized aligned carbon nanotube (CNT) transistors with an extremely high responsivity of 10⁸ A W⁻¹ (gain > 10⁸) in the ultraviolet and visible range, and 720 A W⁻¹ (gain = 940) in the infrared range. In contrast to most sensitized phototransistors that operate on the photogating effect, the new photodetector operates on the modulation of the electrons scattering in the CNTs, leading to negative photoconductivity. Comparison with similar photodetectors using random CNT networks shows the benefit of using aligned CNTs. At room temperature, the aligned CNT photodetectors are demonstrated to detect a few tens of photons per CNT.

中文翻译：

---

使用富勒烯敏化的取向碳纳米管，具有负光敏度为108 AW-1的室温光电晶体管

要检测到几个光子的低强度光，就需要具有高增益的光电检测器。据报道，一种基于C ₆₀敏化的取向碳纳米管（CNT）晶体管的新型光电探测器在紫外和可见光范围内的响应度极高，分别为10 ⁸ AW ^-1（增益> 10 ⁸）和720 AW ^-1（增益= 940）在红外范围内。与大多数通过光电选通效应工作的敏化光电晶体管相反，新型光电探测器通过调制CNT中散射的电子来工作，从而导致负光电导性。与使用随机CNT网络的类似光电探测器的比较显示了使用对齐的CNT的好处。在室温下，已证明对齐的CNT光电探测器可检测每个CNT几十个光子。