Najeeb-ud-din Hakim

Scopus Publications

Deconvoluting the transport mechanisms using electrical impedance spectroscopy in heterojunction organic solar cells doped with trimetallic nanospheres
Baseerat Khan, Hakim Najeeb-ud-din
Engineering Research Express, 2025
Nano-plasmonic structures have attracted the interest of researchers owing to their advantageous properties in solar cells. Ternary nanospheres lead to better charge conduction pathways, thereby reducing losses and boosting efficiency. The synergistic plasmonic effects of the tri-metallic nanospheres enable broader spectral absorption, making them superior for enhancing solar cell performance. This paper presents the simulation study of transportation mechanism and carrier kinetics in poly(3-hexylthiophene): [6,6]-phenyl-butyric acid methyl ester [P3HT: PCBM]-based organic solar cell doped with ternary nanospheres of silver, gold, and copper, which has not been explored prior. Critical electrical parameters, such as relaxation time, charge carrier mobility, diffusion time, flat-band voltage, and doping density, have been determined through AC analysis of the device. SETFOS, an instrumental one-dimensional tool, is used to determine these parameters using methods like impedance spectroscopy, Mott–Schottky analysis and Capacitance–Voltage modelling. This extensive examination allows for a better understanding of the device’s behaviour in the presence of ternary nanospheres. The tri-metallic nanoparticle-doped organic solar cells provide better performance parameters compared with the performance of an undoped solar cell. Further, circuit modelling of solar cells is done to facilitate the optimisation by allowing the simulation and prediction of performance parameters under various operating conditions.
Modeling and design of non-fullerene organic solar cells using pyramidal lens arrays
Asma Iqbal Wani, Farkhanda Ana, Najeeb-Ud-Din Hakim
Micro and Nanostructures, 2025
Study on structure and thermal stability properties of cellulose fibers derived from Nelumbo nucifera rhizome
Mehvish Shah, Najeeb ud din Hakim
Journal of the Indian Academy of Wood Science, 2025
Advances in nanocellulose proton conductivity and applications in polymer electrolyte membrane fuel cells
Mehvish Shah, Najeeb Ud Din Hakim
Next Materials, 2025
Fuel cells, crucial for the advancement of hydrogen-based energy devices, require novel materials for proton exchange membrane (PEM) that are more cost-effective and sustainable. At the core of such an energy source is the proton exchange membrane, which is made to be a good conductor for protons while isolating electrons to flow from the anode to the cathode, imprinting them with an external circuit and generating electricity in the process. Today, the most advanced fuel cell proton exchange membranes are perfluoro sulfonic acid-based (Nafion) membranes, which were initially developed more than 50 years ago. However, the scientific community has redirected its attention to creating next generation sustainable membranes based on natural materials, including nanocellulose , due to the many disadvantages associated with the use of NAFION membranes including high cost, high temperature degradation and environmental impact. Nanocellulose possesses unique characteristics like high mechanical strength , high tensile strength and more importantly renewability, which can be utilised towards fulfilling sustainability goals. Thus, we are of the opinion that a review of the most recent research on the applications of nanocellulose as a material for proton exchange membrane fuel cell components will be of much use in the advancement of this field. This review outlines the significant scientific advancements towards the applications of nanocellulose in polymer electrolyte membrane fuel cells. This analysis encompasses traditional cellulose, materials and films based on nanocellulose resources, polymer composites and blends and chemically altered nanocellulose. These advancements are thoroughly assessed, and intriguing results in the form of increase in proton conductivity and chemical stability are observed, which will further the research in this field towards commercializing nanocellulose in PEM fuel cells.
Analytical modeling of contact resistance and recombination for silicon heterojunction solar cells using hybrid carrier selective passivating contacts
Bisma Bilal, Hakim Najeeb-ud-Din
Physica Scripta, 2024
Silicon heterojunction solar cells using Carrier Selective Passivating Contacts (CSPC) are the potential contenders for high efficiency next generation photovoltaics. Besides numerical simulations, the mathematical analysis of parameters affecting the performance of these cells is gaining considerable attention. In this work, the factors affecting the selectivity of silicon heterojunction solar cell using Hybrid Carrier Selective Passivating Contacts (H-CSPC) are investigated. This includes the evaluation of contact resistance and recombinations in the device. The contact resistance is analyzed in terms of partial resistances wherein an equivalent resistance model for the cell using H-CSPC is devised and resistances are inspected using quasi fermi level collapse over the contacts. The selectivity of the cell at each contact is examined and the condition for maximum selectivity is derived. Further, the recombinations in different regions of the cell using H-CSPC are analyzed. The recombinations at the TiO2/c-Silicon interface strongly deteriorate the V oc of the cell which is quantified using an analytical model under interface defect constraints and the results obtained are compared with simulations.
Applicability of Channel Doping Gradient in the Design of a Short Channel (0.1 µm) LDMOS Transistor for Integrated Power and RF Applications
Sahar Fayaz, Najeeb-ud-din Hakim, G. M. Rather
Transactions on Electrical and Electronic Materials, 2024
Performance Investigation of Alkali Metal Fluorides as Alternate Electron Selective Contacts for TOPCon Solar Cells
Bisma Bilal, Hakim Najeeb-ud-Din
Springer Proceedings in Physics, 2024
Computational Analysis of Antireflection Coatings for Semiconductor Solar Cells
Bisma Bilal, Hakim Najeeb-ud-Din
Springer Proceedings in Physics, 2024
Multi-analyte hybrid plasmonic dual grating biosensor hetereostructured by convexing slit width geometrical corrugation and its potentiality for noninvasive salivary glucose monitoring
Taban Qayoom, Hakim Najeeb-Ud-Din
Optical and Quantum Electronics, 2024
Analog-to-digital converters: a review of existing architectures and a new proposal for high resolution sensors
Saima Bashir, Najeeb-ud-din Hakim, G.M. Rather
Sensor Review, 2023
Purpose As technology advances the demand for an analog-to digital converter has increased, as every application demands a converter as per its parameters. Currently, work is done on improvement of data converters at three levels of design – architectural, circuit and physical level. This paper aims to review the work done in the field of analog-to-digital converters (ADCs) at architectural and circuit level and discusses the achievements in this field. Furthermore, a new architecture is proposed, which works at higher resolution and provides optimum design parameters at low power consumption. Design/methodology/approach A hybrid architecture combining the features of synthetic approximation register and sigma-delta ADC is presented. The validity of the proposed design at architectural level is verified using MATLAB SIMULINK simulations. Findings The design simulation was tested for a sinusoidal wave of 1 V at the test frequency of 60 Hz. The design consumes least power, and is found to yield an error of the order less than 10–3 V, thus providing highly accurate digital output. Originality/value The design is applicable in many applications including biomedical systems, Internet-of-Things and earthquake engineering. This architecture can be further optimized to obtain better performance parameters.
Effective index approximation based analytical modeling and two dimensional numerical investigation of surface and bulk sensitivity in optimized hybrid nanostructured plasmonic gratings with miniaturized footprints
Taban Qayoom, Hakim Najeeb-ud-din
Optical and Quantum Electronics, 2023
Comprehensive field pattern analysis for tailoring of reflectance in a hybrid subwavelength plasmonic grating refractive index sensor and its potential for noninvasive salivary glucose monitoring
Taban Qayoom, Hakim Najeeb-ud-din
Applied Optics, 2022
PAAD (Partially adaptive and deterministic routing): A deadlock free congestion aware hybrid routing for 2D mesh network-on-chips.
Misbah Manzoor, Roohie Naaz Mir, Najeeb-ud-din Hakim
Microprocessors and Microsystems, 2022
Adaptive hybrid arbiter design for real-time traffic-aware scheduling
Afshan Amin Khan, Roohie Naaz Mir, Najeeb-Ud Din
Circuit World, 2022
Prime turn model and first last turn model: An adaptive deadlock free routing for network-on-chips
Misbah Manzoor, Roohie Naaz Mir, Najeeb-ud-din Hakim
Microprocessors and Microsystems, 2022
Towards low cost, industrially compatible silicon heterojunction solar cells using hybrid carrier selective passivating contacts
Bisma Bilal, Hakim Najeeb-ud-Din
Optical Materials, 2022
A Simulation Study of Hybrid Carrier Selective Passivating Contacts for n-Silicon Solar Cells
Bisma Bilal, Hakim Najeeb-Ud-Din
Proceedings of 2022 IEEE International Conference of Electron Devices Society Kolkata Chapter Edkcon 2022, 2022
Analytical Modeling of the Effect of Silver Nanoparticle Incorporation in Active Layer of an Organic Solar Cell
Sakshi Koul, Najeeb-ud-din Hakim
IEEE Transactions on Electron Devices, 2021
Fundamentals of and Recent Advances in Carrier Selective Passivating Contacts for Silicon Solar Cells
Bisma Bilal, Hakim Najeeb-ud-Din
Journal of Electronic Materials, 2021
A comparative perspective on Differential Modal Gain reduction techniques for optimized few mode EDFA systems
Taban Qayoom, Gausia Qazi, Hakim Najeeb-ud-din
Optik, 2021
Device Performance Optimization of Organic Thin-Film Transistors at Short-Channel Lengths Using Vertical Channel Engineering Techniques
F. Ana, N. Din
Semiconductors, 2021
A REVIEW OF DESIGN APPROACHES FOR ENHANCING THE PERFORMANCE OF NOCS AT COMMUNICATION CENTRIC LEVEL
Misbah Manzoor, Roohie Naaz Mir, Najeeb-ud-Din Hakim
Scalable Computing, 2021
Evolution of amplified spontaneous emission and characterization of an optimized two-mode EDFA system obtained from an extended analytical model
Taban Qayoom, Gausia Qazi, Hakim Najeeb-ud-din
Journal of Computational Electronics, 2020
Design, characterization and performance evaluation of few-mode EDFA system with propagation up to six modes
Taban Qayoom, Gausia Qazi, Hakim Najeeb-ud-din
Optical and Quantum Electronics, 2020
A simple analytical model for the resonant tunneling diode based on the transmission peak and scattering effect
Sneh Lata Yadav, Hakim Najeeb-ud-din
Journal of Computational Electronics, 2020
Investigation of Non-ideality Factors for a P3HT: PCBM Based Bulk Heterojunction Organic Solar Cell in Presence of Silver Nanoparticles
Sakshi Koul, Najeeb-ud-din Hakim
Transactions on Electrical and Electronic Materials, 2020
An analytical model for the effects of the variation of ferroelectric material parameters on the minimum subthreshold swing of NC-FETs
Raheela Rasool, Najeeb-ud-Din, G. M. Rather
Journal of Computational Electronics, 2019
An analytical modeling approach to the electrical behavior of the bottom-contact organic thin-film transistors in presence of the trap states
Farkhanda Ana, Najeeb-ud-Din
Journal of Computational Electronics, 2019
Fault-tolerant buffer aware round robin arbiter design for NoC architectures
Afshan Khan et. al.
International Journal of Computing and Digital Systems, 2019
Investigation of active layer thickness variation on the performance of bulk heterojunction organic solar cells
Sakshi Koul, Najeeb-ud-Din Hakim
Springer Proceedings in Physics, 2019
Investigation on Chirping induced performance degradation in Single Mode Directly modulated 1.55um DFB laser
Abida Yousuf, Hakim Najeeb-ud-din
Journal of Optical Communications, 2019
A novel hardware-efficient spatial orientation tree-based image compression algorithm and its field programmable gate array implementation
Mohd Rafi LONE, Najeeb-ud-Din HAKIM
Turkish Journal of Electrical Engineering and Computer Sciences, 2019
The Effect of Shallow Trench Isolation and Sinker on the Performance of Dual-Gate LDMOS Device
Suman Chahar, G. M. Rather, Najeeb-ud-din Hakim
IEEE Transactions on Electron Devices, 2019
Analytical model for the effects of the variation of ferrolectric material parameters on the minimum subthreshold swing in negative capacitance capacitor
Raheela Rasool, Najeeb-ud-Din, G. M. Rather
Journal of Semiconductors, 2019
Investigation on chirping characteristics of a 1.55-µm directly modulated distributed feedback laser
Abida Yousuf, Hakim Najeeb-ud-din
Journal of Optics India, 2018
Recent Advances in the Determination of Optimal Active Layer Thickness for Bulk Heterojunction Organic Solar Cells
Sakshi Koul, Najeeb-ud-din Hakim
Transactions on Electrical and Electronic Materials, 2018
Design and performance investigation of short channel bottom-contact organic thin-film transistors
Farkhanda Ana, Najeeb-ud Din
Journal of Computational Electronics, 2018
Investigation and performance evaluation of filter aided configurations for erbium doped fiber optical amplification system
Taban Qayoom, Gausia Qazi, Najeeb-ud-din Shah
Optik, 2018
FPGA implementation of a low-power and area-efficient state-table-based compression algorithm for DSLR cameras
Mohd Rafi LONE, Najeeb-ud-Din HAKIM
Turkish Journal of Electrical Engineering and Computer Sciences, 2018
Buffer aware arbiter design to achieve improved QoS for NoC
Afshan Amin Khan, Roohie Naaz Mir, Najeeb-ud-din
IEEE Region 10 Annual International Conference Proceedings TENCON, 2017
Comparison of parallel image scanning methods for achieving better throughput
Mohammad Rafi, Najeeb-ud-Din
2017 4th International Conference on Signal Processing and Integrated Networks Spin 2017, 2017
Effect of chirp characteristics of directly modulated laser on the signal transmission performance
Abida Yousuf, Hakim Najeeb-ud-din, Gausia Qazi
2017 4th International Conference on Signal Processing and Integrated Networks Spin 2017, 2017
Effect of mobility degradation on the device performance of organic thin-film transistor's
Farkhanda Ana, Najeeb-ud-Din
IEEE Region 10 Annual International Conference Proceedings TENCON, 2017
Effect of gain compression above and below threshold on the chirp characteristics of 1.55 µm distributed feedback laser
Abida Yousuf, Hakim Najeeb-ud-din
Optical Review, 2016
A novel arrangement for efficiently handling image border in FPGA filter implementation
Mohammad Rafi, Najeeb-ud-Din
3rd International Conference on Signal Processing and Integrated Networks Spin 2016, 2016
The effect of gain compression on the modulation characteristics of 1.55μm distributed feedback laser
Abida Yousuf, Hakim Najeeb-ud-din, Gausia Qazi
3rd International Conference on Signal Processing and Integrated Networks Spin 2016, 2016
Erratum: Performance investigation on clipping and RIN induced degradation for a single- and two-tone IM-DD SCM optical link (Optics Communications (2014) 319 (178-187))
Gausia Qazi, Ajay K. Sharma, H. Najeeb-ud-din Shah (SMIEEE), Moin Uddin
Optics Communications, 2014
Performance investigation on clipping and RIN induced degradation for a single- and two-tone IM-DD SCM optical link
Gausia Qazi, Ajay K. Sharma, H. Najeeb-ud-din Shah (SMIEEE), Moin Uddin
Optics Communications, 2014
Investigation on inter-modulation products (IMPs) for IM-DD SCM optical links
Gausia Qazi, Ajay K. Sharma, H. Najeeb-ud-din Shah, Moin Uddin
Optik, 2014
Simulation study of the electrical behavior of bottom contact organic thin film transistors
Farkhanda Ana, Najeeb-ud-Din
2014 IEEE 2nd International Conference on Emerging Electronics Materials to Devices Icee 2014 Conference Proceedings, 2014
A 4 GS/s, 1.8 V multiplexer encoder based flash ADC using TIQ technique
Liyaqat Nazir, Roohie Naaz Mir, Najeeb-ud-din Hakim
2014 International Conference on Signal Processing and Integrated Networks Spin 2014, 2014
Performance investigation on harmonic distortion and inter-modulation distortion induced degradation for a single- and two-tone IM-DD SCM optical link
Gausia Qazi, Ajay K. Sharma, H. Najeeb-ud-din Shah, Moin-ud-din
Optik, 2014
Effect of Si-SiO2 interface traps and bulk traps on the flicker noise in PD-SOI MOSFETs
International Journal of Applied Engineering Research, 2012
Comprehensive study of SOI-DTMOS for low voltage and low power RF applications
International Journal of Applied Engineering Research, 2012
Synthesis of carry select adder in 65 nm FPGA
Romana Yousuf, Najeeb-ud-din
IEEE Region 10 Annual International Conference Proceedings TENCON, 2008
Modeling of floating β ratio of inverter in silicon-on-insulator technology
Deeba Yousuf, Hakim Najeeb-ud-din Shah
Proceedings of the 14th International Workshop on the Physics of Semiconductor Devices Iwpsd, 2007
Impact of varying electric field: Tunneling in deep submicron nMOSFET
Aasiya Drabu, Hakim Shah
Icsict 2006 2006 8th International Conference on Solid State and Integrated Circuit Technology Proceedings, 2006
Design of a 0.1 νm single halo (SH) thin film silicon-on-insulator (SOI) MOSFET for analogue applications
Najeeb-ud-din Hakim, V Ramgopal Rao, J Vasi
Semiconductor Science and Technology, 2005
Superior hot carrier reliability of single halo (SH) silicon-on-insulator (SOI) nMOSFET in analog applications
N. Hakim, V.R. Rao, J. Vasi, J.C.S. Woo
IEEE Transactions on Device and Materials Reliability, 2005
Thin film Single Halo (SH) SOI nMOSFETs - Short channel performance in mixed signal applications
Proceedings of the IEEE Indicon 2004 1st India Annual Conference, 2004
Thin film single halo (SH) SOI nMOSFETs - Hot carrier reliability for mixed mode applications
IEEE Region 10 Annual International Conference Proceedings TENCON, 2003
Small signal characteristics of thin film single halo SOI MOSFET for mixed mode applications
N. Hakim, V.R. Rao, J. Vasi
Proceedings of the IEEE International Conference on VLSI Design, 2003
Analysis of floating body effects in thin film conventional and single pocket SOI MOSFETs using the GIDL current technique
Najeev-ud-din, M.V. Dunga, A. Kumar, J. Vasi, V. Ramgopal Rao, Baohong Cheng, J.C.S. Woo
IEEE Electron Device Letters, 2002
Characterization and simulation of lateral asymmetric channel Silicon-on-Insulator MOSFETs
Proceedings of SPIE the International Society for Optical Engineering, 2002
Suppression of parasitic BJT action in single pocket thin film deep sub-micron SOI MOSFETs
Najeeb-ud-Din, Aatish K. Mohan, V. Dunga, V. Ramgopal Rao, J. Vasi
Materials Research Society Symposium Proceedings, 2002
Characterization of lateral asymmetric channel (LAC) thin film SOI MOSFETs
Najeeb-ud-Din, M.V. Dunga, A. Kumar, V. Ramgopal Rao, J. Vasi
2001 6th International Conference on Solid State and Integrated Circuit Technology Icsict 2001 Proceedings, 2001

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Scopus Publications