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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.

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