1. Research Scholar, Department of Physics, Baba Saheeb Bhimrao Ambedkar University, Lucknow, U.P.

2. Assistant Professor, Department of Physics, Baba Saheeb Bhimrao Ambedkar University, Lucknow, U.P.

DOI Link (Crossref) Prefix: https://doi.org/10.63431/AIJITR/3.III.2026.19-30

AIJITR, Volume 3, Issue –III, May - June, 2026, PP.19-30

Received on 11th May, 2026 & Accepted on 21st May, 2026,

Published: 17th June, 2026

An ionic liquid (IL) 1-ethyl, 2-methyl imidazolium thiocyanate incorporated biopolymer system is reported in this communication for applications in dual energy devices, i.e., electric double-layer capacitors (EDLCs) and dye-sensitized solar cells (DSSCs). The solution caste method has been used to synthesize ionic-liquid- incorporated biopolymer electrolyte films. The IL mixed biopolymer electrolytes achieve high ionic conductivity up to the order of 10−3 S/cm with good thermal stability above 250 °C. Electrical, structural, and optical studies of these IL-doped biopolymer electrolyte films are presented in detail. The performance of EDLCs was evaluated using low-frequency electrochemical impedance spectroscopy, cyclic voltammetry, and constant current charge–discharge, while that of DSSCs was assessed using J–V characteristics. The EDLC cells exhibited a high specific capacitance of 200 F/gram, while DSSCs delivered 1.53% efficiency under sun conditions.