Porous rGO/ZnSe/CoSe₂dispersed in PEDOT:PSS as an efficient counter electrode for dye-sensitized solar cells

Abstract

In this work, we employ simple hydrothermal method to synthesize metal-organic framework (MOF)-derived selenide from reduced graphene oxide (rGO) / structured zeolitic imidazolate framework (ZIF). The resulting MOF-derived selenide ((rGO/ZIF)@Se)...

Enhanced Performance of Carbon–Selenide Composite with La0.9Ce0.1NiO3 Perovskite Oxide for Outstanding Counter Electrodes in Platinum-Free Dye-Sensitized Solar Cells

“…The peaks related to C=C bonds display quite a high intensity, while those corresponding to C=O bonds show low intensity. This reveals the formation of graphitic carbon during the selenization process of F [27].…”

“…For the preparation of f -MWCNT-ZnSe-CoSe 2 , we performed the selenization of f -MWCNT/ZIF-8@ZIF-67 composite based on a previously reported hydrothermal synthesis of CoSe 2 . [27] First, we prepared a selenium (Se) precursor solution by dissolving NaOH (19.2837 g) in 30 mL of deionized (DI) water, then selenium powder Se (1.5427 g) was added and completely dissolved by heating the mixture at 80 • C. Secondly, we dissolved f -MWCNT/ZIF-8@ZIF-67 powder (2.3234 g) in an EDTA-2Na aqueous (aq.) solution (10 mL, 80 mM).…”

“…The corresponding two key parameters, namely the exchange current density (J 0 ) and the limiting diffusion current density (J lim ), are connected to the catalytic ability of each sample and can be obtained, respectively, from the Tafel and diffusion regions. Moreover, J 0 and J lim can also be obtained by calculation using Equations ( 3) and (4) [27].…”

Metal Chalcogenides (MxEy; E = S, Se, and Te) as Counter Electrodes for Dye–Sensitized Solar Cells: An Overview and Guidelines

“…[184][185][186][187][188][189][190][191] However, very few research works report their use as CEs in DSSCs. [192][193][194][195][196][197][198] In these reports, most MOF-based metal chalcogenide CEs were prepared via in situ calcination and selenization. [192,193,196,197] Hsu et al [197] were the first to synthesize an MOF-derived chalcogenide in 2014 for use as a CE for a DSSC.…”

“…Their work inspired our team to also synthesize without calcination a bimetallic MOF-derived selenide (rGO/ZnSe/CoSe 2 ) by hydrothermal selenization of rGO/ZIF-8@ZIF-67. [198] This porous rGO/ZnSe/CoSe 2 composite was combined with polystyrene sulfonate-doped poly (3, 4- As it was demonstrated that the use of nickel metal in MOF-based chalcogenides contributes to highly improve their performance as electrocatalysts and supercapacitors, this potential can also be investigated for CE application in DSSCs. [189,199]…”