Research in Advanced Materials
Materials are fundamental to many technological applications such as LEDs, Photovoltaics, Spintronics, Sensors, etc. Progress in today’s world mainly depends on the development of new materials and engineering/tuning their properties for any desired application.
Advanced Materials group in the Department is focussed on the development of new advanced materials through innovative synthesis techniques and extensive studies/characterizations on structural, microstructural, optical, electrical and magnetic properties usingconventional techniques, such as XRD, SEM/TEM, optical, electrical and magnetic measurements. In addition, specialized techniques, such as Neutron Diffraction, Near-Edge X-ray Absorption Fine Structure (NEXAFS) and X-ray Magnetic Circular Dichroism (XMCD), etc. are being used through collaborations with national institutes and institutions abroad.
Ongoing research Activities:
- Solid State Ionics and Radiation Damage studies (RD)
- Physics of inorganic glass, glass-ceramics and nano-composites (RVA and BE)
- Multiferroics and Metal Oxide – Carbon Nanomaterials (BA)
- Nanoferrites (BRS)
Solid State Ionics and Radiation Damage studies
Faculty involved : Prof. Ramakrishna Damle
Research in the area of Solid State Ionics
Solid Polymer Electrolytes (SPEs) are promising candidates for high efficiency electrical storage systems. However, the key issue with SPEs is the low conductivity at ambient temperatures. Ways and means of enhancing ionic conductivity in SPEs for practical applications are being investigated. We have demonstrated that exposing the SPEs to ionizing radiation could increase the conductivity by one to two orders of magnitude. Similarly, addition of inert nano fillers to polymer matrix also leads to significant enhancement in ionic conductivity by altering the segmental motion of the polymer chains. Basic research to understand the mechanism of ionic conduction in SPEs is being carried out from the grants received from DAE-BRNS. A wet lab to synthesize SPEs as well as a versatile measurement unit for ionic conductivity studies have been established in the Department.
Research in the area of radiation damage studies in semiconductors
When semiconductor electronic devices operate in a radiation environment (for eg., in space) they get exposed to variety of radiation. This results in electrical degradation of the devices. Hence it is important to study the response of the devices for radiation and their radiation tolerance before they are used for space applications. The study and analysis of radiation induced effects in devices used for space application is thus very important and is a major component of space research.
A number of semiconductor devices viz., BJTs, power transistors, optocouplers and VLSI devices have been investigated for the radiation response. This work has significant relevance to Indian Space Program. Necessary experimental facilities (viz., Deep Level Transient spectrometer (DLTS) and I-V, C-V measurement system) have been established through the grants received from ISRO-RESPOND research project.