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Listar por autor "Ullah, Hanif"

Mostrando ítems 1-12 de 12

Comparative study of binary cadmium sulfide (CdS) and tin disulfide (SnS2) thin buffer layers

Ullah, Shafi; Bouich, Amal; Ullah, Hanif; Marí, B.; Mollar García, Miguel Alfonso (Elsevier, 2020-09-15)

[EN] Binary compound tin disulfide (SnS2) and cadmium sulfide (CdS) are the potential candidates used as a buffer layer for copper indium gallium selenide (CIGS) and copper zinc tin sulfide (CZTS) thin-film device. Herein, ...
Enhancement of the conversion efficiency of thin film kesterite solar cell

Khattak, Yousaf Hameed; Baig, Faisal; Ullah, Shafi; Marí, B.; Ullah, Hanif (American Institute of Physics, 2018)

[EN] Cu2ZnSnS4(CZTS) is a non-toxic earth abundant material and a promising quaternary semiconductor compound of groups I - II - IV - VI having a kesterite symmetrical structure. Due to its optimum direct bandgap, it has ...
Influence of Fe Content in Binary SnS2 Synthesis by Hydrothermal Technique for Photovoltaic Application

Ullah, Shafi; Bouich, Amal; Ullah, Hanif; Vega-Fleitas, Erica; Baig, Faisal; Hameed, Yousaf; Mollar García, Miguel Alfonso; Marí, B. (The Electrochemical Society, 2019-06-18)

[EN] Binary thin disulfide (SnS2) and ternary Sn1-x FexS2 (X = Fe (2.5%, 5% and 10%) which has huge potentials in the visible-light rang due to its bandgap 2.2-2.6 eV. Herein, SnS2 and Sn1-x FexS2 powders have been synthesize ...
Influence of Zinc Content in Ternary ZnCdS Films Deposited by Chemical Bath Deposition for Photovoltaic Applications

Ullah, Shafi; Ullah, Hanif; Bouhjar, F.; Mollar García, Miguel Alfonso; Marí, B.; Chahboun, Adil (The Electrochemical Society, 2018-07-03)

[EN] Cadmium Zinc Sulfide thin films with different Zn concentration were synthesized in aqueous solution by chemical bath deposition (CBD) method using CdSO4, ZnSO4, CH4N2S for Cd+2, Zn+2, and S¿2 ions source, respectively. ...
Investigation on the Effect of Gallium on the Efficiency of CIGS Solar Cells through Dedicated Software

Ullah, Hanif; Marí Soucase, Bernabé; Cui, Hai-Ning (Trans Tech Publications, 2014)

[EN] This work reports on the analysis of thin-film copper¿indium¿gallium¿diselenide (CIGS) solar cells by using Solar Cell Capacitance Simulator software (SCAPS). We have modeled a PV device, which consists in a CIGS ...
Novel compositional engineering for ~26% efficient CZTS-perovskite tandem solar cell

Aamir Shafi, Muhammad; Khan, Laiq; Ullah, Shafi; Shafi, Muhammad Yasir; Bouich, Amal; Ullah, Hanif; Marí, B. (Elsevier, 2022-03)

[EN] The production and commercialization of solar cells should meet such social criteria as price affordability, environment friendly, stability, and high efficiency of established materials.Various solar cells have been ...
Numerical analysis a guide to improve the efficiency of experimentally designed solar cell

Baig, Faisal; Khattak, Yousaf Hameed; Ullah, Shafi; Marí, B.; Ullah, Hanif (Springer-Verlag, 2018)

[EN] In this paper a numerical modelling guide is proposed about how to improve the efficiency of experimentally designed solar cells with the aid of numerical analysis. To validate the study presented in this paper, we ...
Numerical Modeling Baseline for high efficiency (Cu2FeSnS4) CFTS based Thin Film Kesterite Solar Cell

Khattak, Yousaf Hameed; Baig, Faisal; Ullah, Shafi; Marí, B.; Ullah, Hanif (Elsevier, 2018-07)

[EN] Cu2FeSnS4 (CFTS) is auspicious nontoxic and earth abundant semiconductor compound having kesterite symmetrical structure. It is an attractive and suitable material for the fabrication of low cost, high efficiency and ...
Optoelectronic characterization of CuInGa(S)2 thin films grown by spray pyrolysis for photovoltaic application

Bouich, Amal; Hartiti, Bouchaib; Ullah, Shafi; Ullah, Hanif; Ebn Touhami, Mohamed; Santos, D. M. F.; Marí, B. (Springer-Verlag, 2019-08-03)

[EN] Copper-indium gallium disulfide (CIGS) is a good absorber for photovoltaic application. Thin films of CIGS were prepared by spray pyrolysis on glass substrates in the ambient atmosphere. The films were characterized ...
Simulation studies of photovoltaic thin film devices

Ullah, Hanif (Universitat Politècnica de València, 2015-04-14)

To cope with energy requirements the utilization of renewable energies, particularly the Sun supplies the biggest and abundant energy source in Earth. Photo-voltaic and solar cell are the well advance and burning technology ...
Synthesis of CZTS kesterite by pH adjustment in order to improve the performance of CZTS thin film for photovoltaic applications

Aamir Shafi, Muhammad; Khan, Laiq; Ullah, Shafi; Bouich, Amal; Ullah, Hanif; Mari, Bernabé (Elsevier, 2022-04)

[EN] Quaternary CZTS (Cu2ZnSnS4) kesterite thin layers were successfully made by electrochemical deposition method. CZTS thin layers were deposited on Indium Tin Oxide (ITO) from an aqueous solution. In this work, the ...
Synthesis of in-gap band CuGaS2:Cr absorbers and numerical assessment of their performance in solar cells

Ullah, Shafi; Ullah, Hanif; Bouhjar, Feriel; Mollar García, Miguel Alfonso; Marí, B. (Elsevier, 2018)

[EN] CuGaS2 thin films were obtained by sulfurization of CuGaSe2. CuGaSe2 thin films were first electrodeposited from aqueous solutions containing CuCl2, GaCl3, and H2SeO3 and subsequently annealed at 400 °C for 10 min in ...