Jamikorn, S.; Arunchaiya, M.; Friedrich, D.; Dittrich, T.: Solar cell based on PEO, inorganic cations and ionic liquids. Nanomaterials and Energy 1 (2012), p. 216-224
10.1680/nme.12.00007
Abstract:
Quasi-solid-state dye-sensitized solar cells (DSSCs) based on polyethylene oxide (PEO), I2 and inorganic iodides (LiI, KI, NaI, NH4I) and/or ionic liquids ([DMIm]I, [EMIm]I, [MPIm]I, [HMIm]I) were prepared and investigated at AM1·5/10 and AM1·5 illumination conditions. Results revealed highest energy-conversion efficiencies for the PEO + I2 + LiI + [EMIm]I (60 wt%) quasi-solid-state electrolyte of 5·9% and 3·6% at AM1·5/10 and AM1·5, respectively. Moreover, it was shown (within fluctuations of the solar cells’ performance) that the short circuit current density (ISC) decreased with increasing open circuit voltage (VOC) for electrolytes with inorganic cations; however, in the case of the solar cells prepared with ionic liquids, the ISC increased with increasing VOC. Limiting factors and reasons for fluctuations in the performance of quasi-solid-state DSSCs are discussed.