<br>基于铜酞菁和氧化石墨烯复合膜的光增强高灵敏超快压电传感器,International Journal of Molecular Sciences

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基于铜酞菁和氧化石墨烯复合膜的光增强高灵敏超快压电传感器
International Journal of Molecular Sciences ( IF 4.9 ) Pub Date : 2024-06-18 , DOI: 10.3390/ijms25126713
Jihong Wang _{1,

2} , Zhening Fang ₃ , Wenhao Liu _{1,

2} , Liuyuan Zhu _{1,

2} , Qiubo Pan _{1,

2} , Zhen Gu ₄ , Huifeng Wang ₄ , Yingying Huang _{1,

2} , Haiping Fang _{1,

2}

Affiliation

由于对智能和便携式设备的需求不断增长，基于柔性电子器件的自供电可穿戴压力传感器已成为一种新趋势。压力传感性能的改进，包括输出电压、灵敏度和响应时间，可以大大扩展其相关应用；然而，这仍然具有挑战性。在这里，我们报告了一种基于铜酞菁（CuPC）和氧化石墨烯（GO）（CuPC@GO）复合膜的具有新型光增强压力传感性能的高灵敏度压电传感器。在光照射下，CuPC@GO压电传感器的输出电压（381.17 mV，50 kPa）和灵敏度（116.80 mV/kPa，<5 kPa）显着增加，大约是无光传感器的两倍和三倍照明，分别。此外，光照显着提高了传感器的响应速度，响应时间为 38.04 µs，恢复时间为 58.48 µs，同时即使在 2000 次循环后仍保持出色的机械稳定性。密度泛函理论计算表明，当CuPC处于激发态时，从石墨烯到CuPC的电子转移会增加，这表明光照促进了CuPC的电子激发，从而带来了传感器的高极化。重要的是，这些传感器表现出通用的空间非接触式可调节性，突出了它们在各种环境中的多功能性和适用性。

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Light-Boosting Highly Sensitive and Ultrafast Piezoelectric Sensor Based on Composite Membrane of Copper Phthalocyanine and Graphene Oxide

Self-powered wearable pressure sensors based on flexible electronics have emerged as a new trend due to the increasing demand for intelligent and portable devices. Improvements in pressure-sensing performance, including in the output voltage, sensitivity and response time, can greatly expand their related applications; however, this remains challenging. Here, we report on a highly sensitive piezoelectric sensor with novel light-boosting pressure-sensing performance, based on a composite membrane of copper phthalocyanine (CuPC) and graphene oxide (GO) (CuPC@GO). Under light illumination, the CuPC@GO piezoelectric sensor demonstrates a remarkable increase in output voltage (381.17 mV, 50 kPa) and sensitivity (116.80 mV/kPa, <5 kPa), which are approximately twice and three times of that the sensor without light illumination, respectively. Furthermore, light exposure significantly improves the response speed of the sensor with a response time of 38.04 µs and recovery time of 58.48 µs, while maintaining excellent mechanical stability even after 2000 cycles. Density functional theory calculations reveal that increased electron transfer from graphene to CuPC can occur when the CuPC is in the excited state, which indicates that the light illumination promotes the electron excitation of CuPC, and thus brings about the high polarization of the sensor. Importantly, these sensors exhibit universal spatial non-contact adjustability, highlighting their versatility and applicability in various settings.

更新日期：2024-06-18

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