Publications by authors named "D P Samajdar"

Article Synopsis
  • The study investigates the properties and passivation of methylammonium lead triiodide (MAPbI) used in perovskite solar cells, finding a tetragonal crystal structure with a slight excess of PbI at grain boundaries.
  • Optical tests show MAPbI has a band gap of 1.53 eV, suggesting its effectiveness as a visible light absorber for solar energy applications.
  • Simulations predict a maximum power conversion efficiency (PCE) of 26.03% for optimized solar cell designs, highlighting the importance of various parameters like resistance and device structure in improving efficiency.
View Article and Find Full Text PDF

In this study, a comparison of the negative capacitance vertical tunnel field-effect transistor (NC-VTFET) and VTFET for biosensing applications was conducted. Dielectrically modulated TFET demonstrates better sensitivity than the traditional metal oxide field effect transistor as a biosensor in label-free biosensing applications. The TFET biosensor, however, has much room for advancement by enhancing its DC characteristics.

View Article and Find Full Text PDF

Perovskite photovoltaics have an immense contribution toward the all-round development of the solar cell. Apart from the flexibility, stability, and high efficiency, more stress has been given to using lead-free as well as eco-friendly, inexpensive materials in the fabrication of PSC devices. The utilization of non-volatile material, such as cesium tin iodide (CsSnI), can be proposed for designing the PSC device, which not only makes it eco-friendly but also offers better optoelectronic characteristics due to its smaller bandgap of 1.

View Article and Find Full Text PDF

Lead toxicity is a barrier to the widespread commercial manufacture of lead halide perovskites and their use in solar photovoltaic (PV) devices. Eco-friendly lead-free perovskite solar cells (PSCs) have been developed using certain unique non- or low-toxic perovskite materials. In this context, Sn-based perovskites have been identified as promising substitutes for Pb-based perovskites due to their similar characteristics.

View Article and Find Full Text PDF

Perovskite solar cells (PSCs) have become a possible alternative to traditional photovoltaic devices for their high performance, low cost, and ease of fabrication. Here in this study, the SCAPS-1D simulator numerically simulates and optimizes CsPbBr-based PSCs under the optimum illumination situation. We explore the impact of different back metal contacts (BMCs), including Cu, Ag, Fe, C, Au, W, Pt, Se, Ni, and Pd combined with the TiO electron transport layer (ETL) and CFTS hole transport layer (HTL), on the performance of the devices.

View Article and Find Full Text PDF