MoS.sub.2/ZIF-8 derived nitrogen doped carbon (NC)-PEDOT: PSS as optically transparent counter electrode for dye-sensitized solar cells.

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From: Solar Energy(Vol. 218)
Publisher: Elsevier Science Publishers
Document Type: Report
Length: 404 words

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Keywords Transparent counter electrode; Bi-facial DSSCs; ZIF-8; Metal dichalcogenides; And conductive polymers Highlights * MoS.sub.2/NC displays as a core like successfully prepared via solvothermal method. * Blending small portions of MoS.sub.2/NC composite significantly enhancing the catalytic activity of PEDOT: PSS composite CEs toward I.sub.3.sup.-/I.sup.-and [Co (bpy).sub.3].sup.2+/3+ redox mediators due to the synergistic effect. * The MoS.sub.2/NC-PEDOT: PSS composite CEs are transparent in visible range, the power conversion efficiency of the assembled bi-facial DSSCs under the front and the rear irradiation are close to those with Pt CEs. Abstract A few-layered MoS.sub.2 successfully grown on the nitrogen-doped carbon (NC) derived from zeolitic imidazolate framework (ZIF-8) via the hydrothermal method. A small portions of the obtained MoS.sub.2/NC composite blended with Poly (3, 4-ethylenedioxythiophene poly styrene sulfonic acid)PEDOT: PSS(as a conductive binder and utlized as counter electrode (CE) for dye-sensitized solar cells (DSSCs). The spin-coated MoS.sub.2/NC-PEDOT: PSS composite on Fluorine-doped Tin Oxide (FTO) glass not only possesses promissing catalytic ability toward the I.sub.3.sup.-/I.sup.-and [Co(bpy).sub.3].sup.2+/3+ redox mediators but also displayed considerable optical transparency in the visible range thus used to fabricate bi-facial DSSCs. The assembled bi-facial devices with MoS.sub.2/NC-PEDOT: PSS composite CEs showed an excellent power conversion efficiency (PCE) under both the front and the rear irradiations. The PCE of the device with 5% MoS.sub.2/NC-PEDOT: PSS composite CE and I.sub.3.sup.-/I.sup.- redox couple are 7.67 and 4.54%, under the front and rear irradiation respectively. Also, the values of the device with the same composite CE and [Co(bpy).sub.3].sup.2+/3+ redox mediator are 7.87 and 5.34% under the front and rear irradiation, respectively. The optimum performance of the devices with the prepared CEs and both redox systems are comparable with Pt-based devices. Thus, the MoS.sub.2/NC-PEDOT: PSS composite CEs are recommend being a promising Pt-free CEs for DSSCs. Author Affiliation: (a) State Key Laboratory of Silicate Materials for Architecture, Wuhan University of Technology, Luoshi Road, Wuhan 430070, PR China (b) School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road, Wuhan 430070, PR China (c) State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Luoshi Road, Wuhan 430070, PR China (d) Chemistry Department, Faculty of Science, Al-Azhar University, Assiut, 71524, Egypt * Corresponding authors. Article History: Received 20 September 2020; Revised 28 December 2020; Accepted 8 February 2021 Byline: Abdelaal S.A. Ahmed [] (a,d,*), Wanchun Xiang [] (a,*), Fang Shui (a), Bin Li (a), Hassan H.A. Younes (b), Ibrahim S. Amiinu (c), Xiujian Zhao (a)

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Gale Document Number: GALE|A657002939