Nanoelectronics and Semiconductor Devices Group
Memristors and Cross-bar Memories
Dr. Himangshu Jyoti Gogoi
Radharani Yumlebam
Varada Sai Sahith
Objectives:
1. To fabricate memristors using emerging materials suitable for flexible applications.
2. Characterization of memristors to understand their operating principles and ,thereby, optimize their performance.
3. Develop physics-based models for the memristors
4. Integration of memristors in the form of ReRAM crossbar arrays and implementing the relevant read/write circuit for cyber security primitive/neuromorphic applications.
Tandem and Multi-Junction Solar Cells
Atanu Purkayastha
Abdul Basit Andrabi
This research focuses on the optical and electrical stimulation of single-junction and tandem HOIP solar cells. We have developed and compared three approaches to optimize the total carrier generation rate (GT) in tandem solar cells: Fixed Non-Active Layers (FNAL), Non-Active Layers in Pairs (NALP), and Non-Active Layers Separately (NALS). For the CsFAPbX3-FASnI TSC, a broad variety of metal and TCO interlayers were investigated in order to enhance device efficiency at various angles of incidence. ITO interlayer maximizes the performance of this TSC. Titanium is the finest metal interlayer evaluated in this article. In our laboratory, we also fabricate and characterize Pb-free and low-dimensional HOIP solar cells.
Light-Emitting Devices
Abinash Baruah
Objective:
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Fabrication, characterization, and modelling of halide perovskite-based light emitting devices.
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Understanding charge transport, Revealing Charge Carrier Mobility and Defect Densities in these devices via Space-Charge-Limited Current and impedance spectroscopy measurements.
Device Modelling
Abdul Basit Andrabi
Objective:
To understand the underlying physics of the different semiconductor devices which are simulated and fabricated experimentally in our laboratory, and derive analytical and semi-empirical models. For this purpose, we study and use advanced semiconductor characterization systems such as Deep Level Transient Spectroscopy, Impedance Spectroscopy and simulation tools like Santaurus TCAD, Silvaco, Matlab etc.
