About Us

Group Leader

Dr. T. Kanagasekaran pursued his Ph.D from Anna university Chennai. One of the first recipients of Dr. Kothari Fellowship, he was then awarded with government of Japan's prestigious fellowship JSPS, followed by a Research Associate position till 2017. Then he joined as an Assistant professor in Tokohu University, Japan and in 2019 he moved to IISER, Tirupati. Expertised in condensed mater physics and electronic devices, currently his research works focused on organic semiconductor devices and clean energy materials. Click here download his complete CV.

Major Activities

Organic materials are long sought research candidates in materials science due to their easy processesability, tailarobility and cost effective nature. But their physical and chemical stability limits their wide usability. Still organic based OLED and AMOLED displays are commercialized and found to be much effective than the inorganic based devices. In this regard, our group working on four major aspects of organoelectronic devices.

Fabrication and characterization of future devices such as OLET based lasers
Identification and improvisation of bio-compatible organic devices
Device material and architecture engineering
Go Green Initiative : Clean energy optoelectronic materials

Organic Lasers: Laser is one of the important discovery in 20th century. They are almost used everywhere from printers to gravitational wave detection instruments. Inorganic semiconductor lasers are most frequently used for commercial purpose and organic lasers are yet to be realised due to the limitations such as low carrier mobility and low electron injection efficiency.

Our group is currntly working on the development of FET based organic semiconductor lasers. We are using a DFB resonator to reduce the threshold current density and when apply a proper current to this device, it is expected to emitts a very narrow spectrum of resolution around 2 nm. Research problems ranging from finding the proper material identification to device fabrication and the proper construction of optical feedback resonator.
Optoelectronic Materials: Endless tailoring possibilities induce endless optimization cycles. But a better material should have certain expected characteristics. Like, active medium should have proper band gap values. The contacts should fall in the work function region. Dielectric medium should contribute to the expected device capacitance value and so on. Proper optimization is necessary for achieve good properties.

The group is working on the development of ambipolar contacts, polymer based dielectric layers and 2D active medium and intent to study their optoelectronic properties.
Biocompatible Organic Devices: As we are inn the era of Use and Throw, average lifespan of electonic devices has been reduced and one of the eco-threats we are facing is arised due to electonic wastes. Addressing this issue, we are currently focusing on bio-degradable organic devices. Current works focusing on alternate bio-sysnthesized "green" polymers instead of commercial polymers such as PVA or PMMA which might induce plastization effect in the environment.

Further in the era of IoT, sensors play an important role and already screen-bound AMOLED finger print scanners are available inn th market. We are put forth certain effort to develop eco-friendly, bio-compatible sensors to monitor externa stimuli such as including chemical, biological, photo, pressure, and temperature.
Clean Energy Materials: Growing environmental concerns and the depletion of natural resources urgae the scientific community to find alternate materilas and devices which should be as good as the conventional devices but shouldn't (or should have only minimal) impact on the environment. This is a great challenge especially from materials scince perspective. A whole new "Green" mateials has to be synthesized, their structure - property relationship has to be established and finally efficient devices has to be fabricated. In this regard, our group is focusing on organic photovoltaic devices. Methods include DFT modelling, materials synthsis and device fabrication.