**Acknowledgements**

D.K.S. is thankful to Council of Scientific and Industrial Research, Government of India, New Delhi for providing senior research fellowship. S.B.K. acknowledges INSA senior scientist fellowship.

*Practical Applications of Laser Ablation*

Si-based device (**Figure 7**).

**6. Looking into the future**

been summarized below.

**5. Summary**

**Figure 7.**

difference in the work functions of these materials, the band bending of the heterojunction at the interfaces resulted in self-powered behavior. The vertical transport of the PD exhibited an exceptional broadband photoresponse (300–1100 nm) in the self-powered mode. The device shows a responsivity of 9.93 AW−1 under zerobias condition with ultrafast response speeds (response/recovery times - 12.5/14.9 μs). The photoresponse of MoS2/Si has also been given, to show the importance of inserting the AlN layer. The MoS2/Si PD exhibits a responsivity of 1.88 AW−1 (~5 times less) in self-powered mode. The authors have shown that the native oxygen defects are present throughout the AlN layer, and this has been confirmed with the help of X-ray photoelectron spectroscopy and transmission electron microscopy. These oxygen impurities form deep donor states in AlN and modulate the transport of the charge carriers, and this leads to the enhanced performance of the MoS2/AlN/

*(a) Spectral response of the MoS2/AlN/Si-based PD. (b) Schematic of the deep defect states-modulated carrier transport in MoS2/AlN/Si-based device. Figures have been reproduced with permission from Ref. [4].*

The past few years have undoubtedly witnessed tremendous advances in the PLD growth of TMDCs and their applications in the field of photodetection. In this chapter, the basic properties of TMDCs and the common growth techniques employed for their fabrication have been reviewed briefly, followed by a detailed and elaborated discussion about PLD and the important parameters associated with it. Finally, a progressive investigation about the PDs based on TMDCs fabricated through PLD has been discussed. These extensive achievements in the field of photodetection have unquestionably established PLD as one of the most competitive and reliable methods for fabricating industrialscale and high-quality TMDCs. PLD, therefore, certainly has a lot of potential to contribute in the development of the next-generation TMDCs-based PDs in the

Based on the analysis of the previous reports in this area, an outlook regarding the future of PLD-synthesized TMDCs and the related follow-up research work has

**36**

future.

*Practical Applications of Laser Ablation*
