Pani Addition to Improve Contact Between CdTe/CdS Semiconductors

Published on May 31, 2021in Materials Research-ibero-american Journal of Materials1.468
· DOI :10.1590/1980-5373-MR-2020-0464
This paper presents the study of the addition of the polyaniline polymer (PANI), at the junction of the cadmium telluride and cadmium sulfide (CdTe/CdS) layers in order to improve the contact between the layers, to decrease the air gap that limit the conversion photovoltaic. The morphology of CdS, CdTe and polyaniline (PANI) were characterized with multiple techniques including scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and optical absorption. The Metrohm Autolab LED Driver Kit system was used for data collection, and it was possible to obtain the current and voltage parameters of the cells. The inclusion of PANI thin film in CdS/CdTe hybrid solar cells increases the energy conversion efficiency from 0.0075% to 0.15%, this gives a 20-fold increase in efficiency.
#1Maziar Marandi (Arak: Arak University)H-Index: 14
#2F.S. Mirahmadi (Arak: Arak University)H-Index: 3
Abstract In this research CdTe nanocrystals (NCs) were synthesized in aqueous solution through a hot-injection chemical precipitation method. Then a shell formation process was carried out to form CdTe-CdS NCs with different shell thickness. Thioacetamide was applied as a thermo-sensitive source of S and the shell making time was altered in the range of 0–120 min. different core-shell CdTe-CdS NCs were utilized for co-sensitization of the photoanode of the quantum dot sensitized solar cells (QDS...
10 CitationsSource
#1Entidhar Alkuam (UALR: University of Arkansas at Little Rock)H-Index: 5
#2Muatez Mohammed (UA: University of Alabama)H-Index: 5
Last. Tar-Pin Chen (UALR: University of Arkansas at Little Rock)H-Index: 3
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Abstract A thin film and core–shell dye-sensitized solar cell containing cadmium sulfide (CdS) are fabricated by using low cost solution processes. CdS nanoparticles (NPs) and nanorods (NRs) are embedded within the dye-sensitized solar cells structures and investigated. The morphology of CdS NPs and CdS NRs were controlled and characterized with multiple techniques including scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Raman scattering, and o...
18 CitationsSource
#1Dang Hai NinhH-Index: 2
#2Tran Thi ThaoH-Index: 6
Last. Nguyen Nang DinhH-Index: 9
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Polyaniline (PANI) onto indium-doped tin-oxide (ITO)-coated glass samples were prepared by electroopolymerization in 0.5 M H2SO4 solution. Structure and morphology characterization of the PANI films demonstrated that the films were grown onto ITO substrates in the form of polycrystalline microbelts separated by micropores. By analysing the UV-Vis absorption spectra of the PANI films, the energy bandgap was found to be approximately 2.75 eV. The PANI/ITO films exhibited a good reversible electroc...
15 CitationsSource
#2Paulo Herbert França Maia Junior (UFC: Federal University of Ceará)H-Index: 2
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A eletrodeposicao tem sido empregada para a obtencao de materiais semicondutores; todavia, ainda nao estao bem esclarecidos os mecanismos envolvidos neste processo. Neste sentido, este trabalho apresenta a investigacao deste processo, evidenciando a caracterizacao do CdTe eletrodepositado sobre substrato platina em solucao acida. A deposicao ocorre a partir de 0,0 V, em relacao ao eletrodo Ag/AgCl,KClsat, com etapas de controle ativado e de difusao. Os filmes finos de CdTe foram eletrodepositado...
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One of the most frequently used methods for characterizing thin films is UV–Vis absorption. The near-edge region can be fitted to a simple expression in which the intercept gives the band-gap and the fitting exponent identifies the electronic transition as direct or indirect (see Tauc et al., Phys. Status Solidi 15, 627 (1966); these are often called “Tauc” plots). While the technique is powerful and simple, the accuracy of the fitted band-gap result is seldom stated or known. We tackle this que...
451 CitationsSource
The equimolar concentration thin films of Cadmium Sulfide (CdxSx) with the complexing agent TEA were deposited on a glass substrate by the SILAR technique. The crystalline nature with face centered cubic crystal system of the CdS films is determined from X-ray diffraction analysis. The broadened diffraction peaks indicated nano sized particles of the film materials. The surface morphology of the films was studied by SEM analysis. The Energy Dispersive Analysis of X-ray (EDAX) plot confirms the e...
15 CitationsSource
#1Fabiana Lisco (Lboro: Loughborough University)H-Index: 8
#2P.M. Kaminski (Lboro: Loughborough University)H-Index: 11
Last. John M. Walls (Lboro: Loughborough University)H-Index: 26
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Abstract Cadmium Sulphide (CdS) is an important n-type semiconductor widely used as a window layer in thin film photovoltaics Copper Indium Selenide, Copper Indium Gallium (di)Selenide, Copper Zinc Tin Sulphide and Cadmium Telluride (CdTe). Cadmium Sulphide has been deposited using a number of techniques but these techniques can be slow (chemical bath deposition and Radio Frequency sputtering) or the uniformity and the control of thickness can be relatively difficult (close space sublimation). I...
30 CitationsSource
#1Zhenxun Ming (Sichuan University)H-Index: 2
#2Chao Ding (Sichuan University)H-Index: 3
Last. Judy Z. Wu (KU: University of Kansas)H-Index: 35
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Cadmium telluride (CdTe) thin films deposited by pulsed laser deposition (PLD) on fluorine–tin–oxide substrates under different pressures of argon (Ar) + oxygen (O2) at high substrate temperature (Ts = 500 °C) was reported in this paper. In our work, the CdTe thin films were prepared successfully at high Ts by inputting Ar + O2. As reported, PLD-CdTe thin films were almost prepared at low substrate temperatures (<300 °C) under vacuum conditions. The deposition of CdTe thin films at high Ts by PL...
7 CitationsSource
#1V. Senthamilselvi (Government College)H-Index: 4
#2K. RavichandranH-Index: 32
Last. K. SaravanakumarH-Index: 13
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Abstract Good stoichiometric CdS films are fabricated using the successive ionic layer adsorption and reaction (SILAR) technique. Several sets of films are prepared by keeping the number of cycles of immersion as 25, 50, 75 and 100 and the effects of number of immersion cycles on the stoichiometry together with their optical and structural properties are studied. The X-ray diffraction studies showed that the films prepared from 100 cycles exhibited good crystallinity. The optical investigations ...
34 CitationsSource
#1Junfeng Han (PKU: Peking University)H-Index: 16
#2Christina Spanheimer (Technische Universität Darmstadt)H-Index: 13
Last. Wolfram Jaegermann (Technische Universität Darmstadt)H-Index: 72
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Abstract CdS layers grown by chemical bath deposition (CBD) are treated in different ways to improve the performance of CdS/CdTe solar cells. It has been found that the open circuit voltage of the CdS/CdTe solar cell increases when the CBD CdS is annealed with CdCl 2 before the deposition of CdTe by close spaced sublimation (CSS). A thin CBD CdS (∼80 nm) with bi-layer structure can significantly improve the short circuit current of the CdS/CdTe solar cells.
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