| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advances in Emerging Electronic Nanomaterials: Towards Next-Generation Microelectronics
|
| Presentation Title |
Bias Modulated Nano Optical Sensor for Dual Color Detection by MoS2/ZnO Van der Waals Heterostructure |
| Author(s) |
Kishan Lal Kumawat, Pius Augustine, Deependra Kumar Singh, Karuna Kar Nanda, Saluru Baba Krupanidhi |
| On-Site Speaker (Planned) |
Kishan Lal Kumawat |
| Abstract Scope |
Multispectral information acquisition using a single device without the need of optical filters supports miniaturization of optical sensors and enhances the integration capability of imaging technology. So far, it has been achieved using multi absorber layers and epitaxial grown superlattice heterostructures, which results in expensive circuitry. We have fabricated a simple yet effective dual color photodetector that switches the detection from visible to NIR radiation with the applied bias. The device has been fabricated by vertically stacking a few layers of MoS2 (thickness ~6.5 nm) on 30 nm ZnO layer using pulsed laser deposition and sputtering, respectively. The interface barrier between these two layers allows selective charge transport from each layer upon bias modulation and exhibit fine spectral discrimination. The device shows impressive responsivity of 4.56 and 6.04 x 103 AW-1 under the visible and NIR illumination which attests the MoS2/ZnO heterostructure for next-generation cost and device integration effective photodetector.. |