Please use this identifier to cite or link to this item: http://archive.cmb.ac.lk:8080/xmlui/handle/70130/5759
Title: Enhancement of Solar Cell Performance of Electrodeposited Ti/n-Cu2O/p-Cu2O/Au Homojunction Solar Cells by Interface and Surface Modification
Authors: Jayathilaka, Charith
Kumara, Loku Singgappulige Rosantha
Ohara, Koji
Song, Chulho
Kohara, Shinji
Sakata, Osami
Siripala, Withana
Jayanetti, J. K. D. S.
Keywords: Cuprous oxide
Electrodeposition
Homojunction
HEXRD patterns
Surface treatment
J-V characteristic
Issue Date: 2020
Citation: Jayathilaka, Charith., Kumara, Loku Singgappulige Rosantha., Ohara, Koji., Song, Chulho., Kohara, Shinji., Sakata, Osami., Siripala, Withana. & Jayanetti, Sumedha (2020) Enhancement of Solar Cell Performance of Electrodeposited Ti/n-Cu2O/p-Cu2O/Au Homojunction Solar Cells by Interface and Surface Modification, Crystals, 10, 609. doi:10.3390/cryst10070609
Abstract: Cuprous oxide (Cu2O) homojunction thin films on Ti substrates were fabricated by an electrochemical deposition in which a p-Cu2O layer was deposited on an n-Cu2O layer by carefully controlled bath conditions. It was found that the open-circuit voltage of the homojunction solar cell was significantly influenced by the pH of the lactate bath. The variation of the pH was used to achieve the best possible crystal orientation for homojunctions. The crystallinity and morphology of the products were characterized by X-ray diffraction (XRD), high-energy x-ray diffraction (HEXRD), and scanning electron microscopy (SEM). The current density voltage (J-V) analysis showed that the sulfur treatment and annealing enhanced the photocurrent by ten-fold compared to the untreated and unannealed homojunction solar cell. X-ray photoelectron spectroscopy (XPS) studies confirmed that the sulfur treatment eliminated the surface CuO and formed a thin layer of CuS, which was very useful to make the front Ohmic contact. Transient measurements confirmed that the p-type Cu2O layer, which was subjected to sulfur treatment, significantly reduced the recombination, thus enhancing the efficiency of the solar cell. The best sulfur treated annealed Ti/n-Cu2O/p-Cu2O/Au solar cell produced an energy conversion efficiency of 2.64% with an open-circuit voltage of 490 mV and a short circuit current density of 12.8 mA cm−2 under AM 1.5 illumination.
URI: http://archive.cmb.ac.lk:8080/xmlui/handle/70130/5759
Appears in Collections:Department of Instrumentation & Automation Technology

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