Abstract
The long-term stability of liquid-state dye-sensitized solar cells (liquid-DSSCs) is a primary problem for the upscaling and commercialization of this technology. The solid-state dye-sensitized solar cell (ss-DSSC) has been instigated to overcome the liquid-DSSC’s inherent production and instability issues and advancement has been made to achieve low-cost high-power conversion efficiency. The photovoltaic performance of ruthenium-based complex Z907 dye was studied in ss-DSSCs using a solid-state polymerized conductive polymer as hole-transporting material (HTM). We investigated the long-term stability of both liquid and solid-state DSSCs and the findings revealed an improved photovoltaic performance and long-term stability of ss-DSSC. This mainly depends on the transport phenomena of the HTM throughout the interface. The present results show a pavement for manufacturing highly stable and inexpensive ss-DSSC and the practical use is promising.
Highlights
Due to controllable optical, electrochemical and conductive characteristics, conjugated conducting polymer materials are of considerable importance for different applications such as chemical sensors, organic light-emitting diodes, electrochromic cells, photovoltaic cells, and organic field-effect transistors [1,2,3,4,5,6]
In solid-state dye-sensitized solar cell (ss-DSSC), an increased level of interfacial contact between the hole-transporting material (HTM) layer and the photoactive layer had a crucial effect in increasing the photovoltaic performance
The surface morphology images showed the successful deposition of all layers of ss-DSSC and all the TiO2 nanoparticles were covered by conductive polymer
Summary
Electrochemical and conductive characteristics, conjugated conducting polymer materials are of considerable importance for different applications such as chemical sensors, organic light-emitting diodes, electrochromic cells, photovoltaic cells, and organic field-effect transistors [1,2,3,4,5,6]. Hole-transporting materials (HTMs) based on solid-state polymerized polymers have been applied in solid-state dye-sensitized solar cells (ss-DSSCs), promising to replace the conventional polymerization methods and the SSP method [18,19,20,21]. As monomers can quickly infiltrate into the nanopores of the photoactive layer, they are essential tools to enhance the interfacial contact properties between the photoanode and HTM in ss-DSSCs [18,19]. In SSP, polymerization progresses in crystalline forms and in such a way that the short distances between the monomers are crucial to minimize the activation energy for polymerization
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