Perovskite solar cells (PSCs) based on organic–inorganic lead halide are attracting a great deal of attention as next generation solar cells due to their simple manufacture, large absorption coefficient, long carrier diffusion length, high carrier mobility and high efficiency. Despite these advantages, PSCs are low in stability. Therefore, research efforts are being devoted to solving this problem and commercializing PSCs.
Stability in PSCs is that of perovskite minerals. Ionic liquids are being used to increase the stability and efficiency of perovskite solar cells (PSCs). Ionic liquids not only help to enlarge the grain size of perovskite due to their high thermal stability and low volatility, but also passivate the defects on the perovskite surface, thus increasing the stability and efficiency.
Based on this fact, Ri Chun Il, a researcher at the Faculty of Chemical Engineering, has improved the stability of PSCs by using 1-ethyl-3-methylimidazolium tetracyanoborate (EMIMTCB).
The power conversion efficiency (PCE) of the three-layer-structured PSCs fabricated using this ionic liquid was 13.8% to the maximum.
If further information is needed, please refer to his paper “Improving stability and efficiency of perovskite solar cells by 1-ethyl-3-methyl imidazolium tetracyanoborate ionic liquid” in “Journal of Saudi Chemical Society” (SCI).