Mono-ion transport electrolyte based on ionic liquid polymer for all-solid-state dye-sensitized solar cells |
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| Authors: | Guiqiang Wang Shuping Zhuo Liang Wang Shibi Fang Yuan Lin |
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| Affiliation: | 1. College of Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China;2. Institute of Chemistry, Chinese Academy of Science, Beijing 100080, PR China;1. Institute of Physics, University of Silesia, ul. 75 Pulku Piechoty 1, 41-500, Chorzow, Poland;2. Silesian Center of Education and Interdisciplinary Research, University of Silesia, ul. 75 Pulku Piechoty 1A, 41-500, Chorzow, Poland;3. Institute of Chemistry, University of Silesia, ul. Szkolna 9, 40-007, Katowice, Poland;4. Department of Chemical Organic Technology and Petrochemistry, Silesian University of Technology, ul. Krzywoustego 4, 44-100 Gliwice, Poland;5. Department of Organic Chemistry, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia in Katowice, ul. Jagiellońska 4, 41-200, Sosnowiec, Poland |
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| Abstract: | Ionic liquid polymers, poly(1-alkyl-3-(acryloyloxy)hexylimidazolium iodide), are synthesized and used as mono-ion transport electrolytes for all-solid-state dye-sensitized solar cells. For these ionic liquid polymers, imidazolium cations are tethered on polymer main chain and only iodide species is mobile. Such a mono-ion transport feature is favorable as solid-state electrolyte in dye-sensitized solar cells. High thermal stability up to 200 °C for these ionic liquid polymers is confirmed by thermogravimetric analysis. Among these ionic liquid polymers, poly(1-ethyl-3-(acryloyloxy)hexylimidazolium iodide) (PEI) exhibits the highest ionic conductivity (3.63 × 10?4 S cm?1) at room temperature. The dye-sensitized solar cell based on PEI electrolyte without the addition of iodine exhibits the open-circuit voltage of 838 mV, the short-circuit current density of 9.75 mA cm?2 and the conversion efficiency of 5.29%, measured at AM 1.5 illumination (100 mW cm?2). Incorporating iodine into PEI electrolyte results in the decrease of both the open-circuit voltage and the photocurrent density due to the visible light adsorption by iodine and the enhancement of the recombination between conduction band electrons and the triiodide. |
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