Active Research Areas

Memristor Devices with Synaptic Plasticity

  1. 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

  1. 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.

  2. 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.

  3. 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

  1. 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.

  1. 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.

  1. 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.

  2. 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.

  3. 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.

  1. 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.

  2. 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.

  1. 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.