6.16% Efficiency of Solid-State Fiber Dye-Sensitized Solar Cells Based on LiTFSI Electrolytes with Novel TEMPOL Derivatives

Abstract

Dye-sensitized solar cells (DSSCs) have attracted intense scientific interest due to their low cost, environmentally friendly operation, and relatively high efficiency. In particular, solidstate fiber dye-sensitized solar cells (SS-FDSSCs) have attracted significant attention for their potential applications in portable, flexible, and wearable electronics. However, the use of general DSSCs in these applications is limited by their highly leaksusceptible volatile liquid electrolytes. Therefore, the development of a highly efficient and stable solid-state electrolyte in SS-FDSSCs is a research challenge. Hence, the present letter describes the development of a highly conductive and stable structure on a hybrid-based LiTFSI electrolyte with 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPOL) that has high catalytic oxidant characteristics. After device optimization, the power conversion efficiency (PCE) with the TEMPOL p-toluenesulfonate (TpTS)based SS-FDSSCs was 6.16%, which is comparable to that of the reference device (i.e., 4.21%). Moreover, the SS-FDSSCs devices with TpTS retained greater than 92% of their efficiency over 500 bending cycles and 10 washing cycles.

Functional Fiber Materials to Smart Fiber Devices

“…As a result, the fiber DSSC could provide a PCE of 6.16% and survive 500 bending cycles and 10 washing cycles with 92% of the initial PCE. 209 Overall, fiber DSSCs have been developed rapidly during the past decade. The findings of new electrode materials, active materials, and electrolytes have evolved from experimental prototypes toward real platforms to power electronic devices.…”

“…Therefore, quasi-solid-state and solid-state fiber DSSCs were developed with novel gel electrolytes and solid-state electrolytes. ,− For example, a solid-state electrolyte was created using a hybrid of a LiTFSI electrolyte and 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl with high catalytic oxidant characteristics. As a result, the fiber DSSC could provide a PCE of 6.16% and survive 500 bending cycles and 10 washing cycles with 92% of the initial PCE …”

Improved Light Harvesting of Fiber-Shaped Dye-Sensitized Solar Cells by Using a Bacteriophage Doping Method

“…The FDSSCs fabricated here are based on previous experiments [28,29]. A Ti wire was cleaned by deionized water, acetone, and isopropanol alcohol (IPA) sequentially for 10 min under the sonication.…”

Efficient charge transport in a solid electrolyte with percolated Pt for solid-state fiber dye-sensitized solar cells

“…Recently, highly conductive solid state electrolytes were developed based on lithium bis-(trifluoromethane sulfonyl) imide with 4-hydroxy-2,2,6,6-tetra methyl piperidin-1-oxyl derivative. 11 Using such a hybrid electrolyte system, charge transportation and transfer efficiency were enhanced because of increased ion conductivity. Thus, the device showed an increased J SC value and a high efficiency of 6.16%, which is the highest efficiency ever reported in S-FDSSCs.…”