Active Research Areas

Memristor Devices with Synaptic Plasticity

Sinha, S., Sahad, E. M., Mondal, R., Das, S., Manamel, L. T., Brandao, P., de Bruin, B., Das, B. C. & Paul, N. D., 2022. A Singlet-Diradical Co(III)-Dimer as a Nonvolatile Resistive Switching Device: Synthesis, Redox-Induced Interconversion, and Current-Voltage Characteristics. Journal of the American Chemical Society, 144(44), pp.20442-20451.
Parveen, S., Manamel, L. T., Mukherjee, A., Sagar, S. & Das, B. C., 2022. Analog Memristor of Lead-Free Cs4CuSb2Cl12 Layered Double Perovskite Nanocrystals as Solid-State Electronic Synapse for Neuromorphic Computing. Advanced Materials Interfaces, 9(30), pp.2200562.
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.
Saha, P., Sahad, E. Sandaap Sathyanarayana., 2024. Solution-Processed Robust Multifunctional Memristor of 2D Layered Material Thin Film. ACS Nano, 18, pp. 1137-1148.
Thomas, A., Saha, P., Sahad, E. M., Krishnan, N. K. & Das, B. C., 2024. Versatile Titanium Carbide MXene Thin-Film Memristor with Adaptive Learning Behavior. ACS Applied Materials Interfaces, 16, pp. 20693-20704.
Sarkar, P.; Manamel, L. T.; Saha, P.; Jana, C.; Sarmah, A.; Mohanan, K. U.; Das, B. C.; Mukherjee, C. A triradical-containing trinuclear Pd(ii) complex: spin-polarized electronic transmission, analog resistive switching and neuromorphic advancements. Materials Horizons 2024, 10.1039/D4MH00928B. DOI: 10.1039/D4MH00928B.

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.
Mukherjee, A., Mohanan, K.U., Sagar, S. & Das, B. C., 2024. Superionic Silver Halide Solid Electrolyte: Dielectric Property and Iontronic Memtransistor Application for Bioinspired Computing. Advanced Functional Materials, 34, pp. 2304228.

Perovskite Photodetectors

Sathyanarayana, S.; Krishnan K, N.; Das, B. C. Synergy between asymmetric contact geometry and self-powered operation of an ultrasensitive CsPbBr3 photodetector. Physical Review Applied 2024, 21 (4), 044015.

2D Photodetector cum Photoreceptor like Retina

Krishnan K, N., Sagar, S., Mukherjee, A. & Das, B. C., 2023. Large-Area Growth of Two-Dimensional Rhenium Disulfide Depicting Robust Artificial Photoreceptor-cum-Optic Nerve Synaptic Functionality. ACS Applied Optical Materials, 1(3), pp.759-770.
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.
Krishnan, N. K., Sandaap Sathyanarayana & Das, B. C., 2024 Grain Boundary effect unveiled in monolayer MoS2 for photonic neuromorphic applications. Journal of Material Chemistry C, 12, pp. 13827-13839.

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.
Manamel, L. T., Singh, A., Saha, P., Sandaap Sathyanarayana., Bhattacharya, S. & Das, B. C., 2024. Unveiling Negative Differential Resistance and Superionic Conductivity: Water Anchored on Layered Materials. Journal of Physical Chemistry Letters, 15 (32), pp. 8167-8176.

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.

Sreedharan, A. & Das, B. C., 2023. Efficient carrier-filtering performance probing of oxide buffer-layers in organic solar cell at nanoscale. Organic Electronics, 114, pp.106728.
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.
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.

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.