Research Projects

This project aims to leverage molecular electronics (ME) to develop robust, temperature-independent, wavelength selective and ultrasensitive tunnel photodetectors (PDs), addressing the limitations of conventional semiconductor devices in space and defence applications. By utilizing molecular junctions (MJs) with distinct HOMO-LUMO characteristics, the device harnesses quantum tunneling for efficient, temperature independent charge transport. The robust molecular junction-based tunnel photodiode (MJPDs) will be fabricated by designing the bottom electrodes using photolithography, grafting organic molecules through electrochemical methods followed by top electrode deposition. The molecular layers will be characterized by atomic force microscopy (AFM) and in-situ spectroscopy techniques. The MJPDs will be rigorously tested to evaluate its temperature dependence and responsivity. Key performance metrics, such as current density, activation energies, and robustness under varying conditions will be assessed to make it for real world application. The proposed research has the potential to push molecular electronics from lab-scale experiments to practical real-world applications, offering novel solutions for temperature-independent and ultrafast devices. This advancement paves the way for the development of next-generation photodetectors, enhancing reliability and performance, particularly in harsh environments encountered in space and defence technology.