Active Research Areas
Memristor Devices with Synaptic Plasticity
Manamel, L. T., Madam, S. C., Sagar, S. & Das, B. C., 2021. Electroforming-free nonvolatile resistive switching of redox-exfoliated MoS2 nanoflakes loaded polystyrene thin film with synaptic functionality. Nanotechnology, 32(35), pp.35LT02.
Memtransistor with Artificial Neural Functionalities
Sagar, S., Mohanan, K. U., Cho, S., Majewski, L. A. & Das, B. C., 2022. Emulation of synaptic functions with low voltage organic memtransistor for hardware oriented neuromorphic computing. Scientific Reports, 12(1), pp.3808.
Mukherjee, A., Sagar, S., Parveen, S. & Das, B. C., 2021. Superionic rubidium silver iodide gated low voltage synaptic transistor. Applied Physics Letters, 119(25), pp.253502.
Sagar, S., Dey, A. & Das, B. C., 2019. Unconventional Redox-Active Gate Dielectrics To Fabricate High Performance Organic Thin-Film Transistors. ACS Applied Electronic Materials, 1(11), pp.2314-2324.
2D Photodetector cum Photoreceptor like Retina
Krishnan, N. K., Sreedharan, A., Sagar, S., Manamel, L. T., Mukherjee, A. & Das, B. C., 2021. Self-Powered broadband photodetection of copper phthalocyanine by enhancing photogating effect with monolayer MoS2 flakes. Applied Surface Science, 568, pp.150818.
2D Layered Materials & Composites
Facile growth of different 2D transition metal dichalcogenides (TMDCs).
Preparation of charge-transfer nanohybrids using 2D Transition Metal Dichalcogenides (TMDCs), QDs, and organic semiconductors.
Purpose is to improve the electronic properties and show their potential device applications with improved performances.
Manamel, L. T., Mukherjee, A. & Das, B. C., 2020. Two-dimensional nanohybrid of MoS2 and Rose Bengal: Facile solution growth and band structure probing. Applied Surface Science, 530, pp.147063.
Ultralow Power Thin Film Transistors
Demonstration of high performance and ultralow voltage operated thin film transistors (TFTs).
Finding of active channel materials with high carrier mobility for the faster-reading response.
Study the operation and carrier dynamics to design transistors with sub-thermionic sub-threshold swing.
Mukherjee, A., Ottapilakkal, V., Sagar, S. & Das, B. C., 2021. Ultralow-Voltage Field-Effect Transistors Using Nanometer-Thick Transparent Amorphous Indium-Gallium-Zinc Oxide Films. ACS Applied Nano Materials, 4(8), pp.8050-8058.
Mohammadian, N., Das, B. C. & Majewski, L. A., 2020. Low-Voltage IGZO TFTs Using Solution-Deposited OTS-Modified Ta2O5 Dielectric. IEEE Transactions on Electron Devices, 67(4), pp.1625-1631.
Sagar, S., Mohammadian, N., Park, S., Majewski, L. A. & Das, B. C., 2020. Ultra-thin anodized aluminium dielectric films: the effect of citric acid concentration and low-voltage electronic applications. Nanotechnology, 31(25), pp.255705.
Cost-effective Photovoltaic Devices
Direct conversion of solar light energy into utilizable electricity using 2-terminal simple devices architecture.
Purpose is to minimise fabrication cost under ambient environment and improve PCE.
Development of simple devices fabrication protocol in ambient.
Anjusree, S., Arya, K. R. & Das, B. C., 2020. Air-processed active-layer of organic solar cells investigated by conducting AFM for precise defect detection. Rsc Advances, 10(42), pp.24882-24892.
Anjusree, S. & Das, B. C., 2022. Effect of semiconducting nature of ZnO interfacial layer on inverted organic solar cell performance. Journal of Physics D-Applied Physics, 55(33), pp.335103.
Nanomaterials and Plasmonics
Synthesis of high quality QDs with diverse functionalities following standard protocols.
Probing their properties by varying size, shape, crystallinity, composition, capping ligands, and so on.
Demonstration of thin film device applications in the field of plasmonics, memristor, transistor, LED, solar cell, and various sensor.
Sandhya, K. M. & Das, B. C., 2020. Plasmonic Hot Carrier Induced Photosensitization of CdSe Quantum Dots: Role of Phonons. Journal of Physical Chemistry C, 124(22), pp.12095-12105.