Raj Kumar Koninti

JSPS Postdoctoral Research Fellow
Google Scholar : Raj Kumar Koninti


・B.Sc. – City College, Osmania University, Hyderabad (2006-08)
・M.Sc. – Indian Institute of Technology (IIT), Madras (2009-11)
・Ph.D. – Indian Institute of Science Education and Research (IISER), Pune. (2012-18), Prof. Partha Hazra’s group
・Postdoc – Department of Chemistry, Pusan National University, Prof. Manho Lim’s group (2018-19)
・JSPS postdoc – Department of Chemistry, Kyushu University, Prof. Ken Onda’s group (2019-present)


Zaheerabad, Telangana, India


Cricket, Badminton, Watching Movies

Research:Exploring the Photophysics of the Thermally Activated Delay Fluorescence Process

The thermally activated delay fluorescence (TADF) process has attracted enormous attention in organic light emission (OLED) applications because it effectively harvests both singlet and triplet excitons through reverse intersystem crossing (rISC) mechanisms, improves the IQE compared to the conventional fluorescent materials. Intra-molecular structural changes in the excited states have significant impacts on TADF activity. Still, direct mechanistic details of structural dynamics of TADF molecules remain elusive. Therefore, it is vital to understand and control the effect of structural restriction on photophysical properties. We focused on understanding the modulation of photophysical behaviors of TADF molecules and TADF building block chromophores under structural restriction conditions by the host-guest complexations. Our efforts are focused on a host-matrix induced TADF activity from the very simple organic chromophores without any chemical modifications.

Figure 1. Host matrix-induced TADF activity in Benzophenone.

Major Achievements

Acdemic Awards

6. Selected for Gold medal award in Chemistry in B.Sc. (2009)

5. Attained a junior research fellowship (CSIR-NET-2011) from the Govt. of India to pursue a Ph.D.

4. International travel support scheme award from Science and Engineering Research Board under Department of Science and Technology (DST-SERB), Govt. of India.

3. Infosys scholars award for attending an international conference (2017)

2. Best poster award in 5th Inter-IISER Chemistry Meet (iChem-2015) held at Indian Institute of Science Education and Research (IISER), Thiruvananthapuram.

1. Best poster award in an international workshop on Radiation and Photochemistry (PUWORP-2016) held at Savitribai Phule Pune University, Pune, India.

Conference presentations, etc.

3. Oral presentation in the 6th Inter-IISER Chemistry Meet-2017 (IICM-2017) held at IISER-Bhopal, Bhopal, India.

2. Raj Kumar Koninti and Partha Hazra, Ultrafast Fluorescence Dynamics of Highly Stable Copper Nanoclusters Synthesized inside the Nanopool of Reverse Micelles, Applied Nanotechnology and Nanoscience International Conference (ANNIC 2017), held in Rome, Italy.

1. Oral presentation in the mini-symposium on advanced chemistry-2016 held at IISER-Pune, Pune, India.

7. Raj Kumar Koninti, Kiyoshi Miyata, Masaki Saige, Ken Onda*,
“Ultrafast Fluorescence Dynamics of Highly Stable Copper Nanoclusters Synthesized inside the Nanopool of Reverse Micelles.”,
J. Phys. Chem. C., submitted..

6. Raj Kumar Koninti, Tetsu Tamura, Kiyoshi Miyata, Youichi Tsuchiya, Chihaya Adachi, Ken Onda*,
“Mechanistic Details of Thermally Activated Delayed Fluorescence Activity Triggered by a Host Matrix via Adjusting Excited State Energy Levels.”,
Manuscript under preparation.

5. Raj Kumar Koninti, Sagar Satpathi and Partha Hazra*,
“Selective Reduction Mechanism of Graphene Oxide Driven by the Photon Mode versus the Thermal Mode”,
J. Phys. Chem. C, 122, 5742-5752 (2018).

4. Raj Kumar Koninti, S. Palvai, Sagar Satpathi, S. Basu, Partha Hazra*,
“Loading of an Anti-cancer Drug into Mesoporous Silica Nano-channels and its Subsequent Release to DNA”,
Nanoscale, 8, 18436-18445 (2016).

3. Raj Kumar Koninti, S. Sappati, Sagar Satpathi, Krishna Gavvala, Partha Hazra,
“Spectroscopy and Dynamics of Cryptolepine in the Nanocavity of Cucurbit [7] uril and DNA”,
ChemPhysChem, 17, 506-515 (2016).

2. Raj Kumar Koninti, Krishna Gavvala, A. Sengupta, Partha Hazra,
“Excited State Proton Transfer Dynamics of Topotecan inside Bio-mimicking Nano-cavity”,
J. Phys. Chem. B, 119, 2363-2371 (2015).

1. Raj Kumar Koninti, A. Sengupta, Krishna Gavvala, Nirmalya Ballav, Patha Hazra,
“Loading of an Anti-cancer Drug onto Graphene Oxide and Subsequent Release to DNA/RNA: A Direct Optical Detection”,
Nanoscale, 6, 2937-2944 (2014).

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