Li Tianxiang, Yuan Hao, Cai Wentong, Su Qi, Kong Lingxian, Sun Bo, Shi Tielin
Aviation Key Lab of Science and Technology on High Performance Electromagnetic Windows, Jinan 250023, China.
Innovation Center for Electromagnetic Functional Structure, Jinan 250023, China.
Nanomaterials (Basel). 2025 Apr 18;15(8):622. doi: 10.3390/nano15080622.
Retina-like photoimaging devices with features such as a wide-field-of-view and high spatial resolution have wide application prospects in retinal prosthetics and remote sensing. However, the fabrication of flexible and conformal surfaces is hindered by the incompatible microfabrication processes of traditional rigid, silicon-based substrates. A kirigami strategy for hemispherical surface assembly is proposed to construct a MoS-based retina-like photodetector array. The device is first fabricated on a flat polyimide (PI) substrate and then tailored using a laser. By approximating the spherical surface using planar sectors, the laser-cut PI film can tightly adhere to the PDMS spherical shell without significant wrinkles. The responsivity and specific detectivity of our conformal photodetector can reach as high as 247.9 A/W and 6.16 × 10 Jones, respectively. The array integrates 180 pixels on a spherical crown with a radius of 11 mm, and a hollow letter "T" is successfully recognized. Comprehensive experimental results in this work reveal the utility of our device for photoelectric detection and imaging. We believe that our work provides a new methodology for the exploitation of 2D material-based retinal image sensors.
具有宽视场和高空间分辨率等特性的视网膜样光成像器件在视网膜假体和遥感领域具有广阔的应用前景。然而，传统刚性硅基衬底不相容的微制造工艺阻碍了柔性和保形表面的制造。提出了一种用于半球形表面组装的折纸策略，以构建基于MoS的视网膜样光电探测器阵列。该器件首先在平坦的聚酰亚胺（PI）衬底上制造，然后使用激光进行定制。通过用平面扇形近似球形表面，激光切割的PI膜可以紧密地粘附在PDMS球壳上而不会产生明显的褶皱。我们的保形光电探测器的响应度和比探测率分别可高达247.9 A/W和6.16×10琼斯。该阵列在半径为11 mm的球冠上集成了180个像素，并成功识别出一个空心字母“T”。这项工作中的综合实验结果揭示了我们的器件在光电检测和成像方面的实用性。我们相信我们的工作为开发基于二维材料的视网膜图像传感器提供了一种新方法。
