Use of lithium iodide and tetrapropylammonium iodide in gel electrolytes for improved performance of quasi-solid-state dye-sensitized solar cells: Recording an efficiency of 6.40%

Enhancing Performance of SnO2-Based Dye-Sensitized Solar Cells Using ZnO Passivation Layer

“…The presence of the Li + ions increases the amorphous nature of the gel electrolyte due to the formation of cross-linking sites with polymer backbone, thus enhancing the diffusivity of the triiodide ions (for Li + ion based electrolyte, 1.7 × 10 −7 cm 2 s −1 , and for Pr 4 N + ion based electrolyte, 9.90 × 10 −8 cm 2 s −1 ). Li + ions can be adsorbed onto the semiconductor surface, thus lowering the conduction band level of the semiconductor [22]. This effect will increase the SC while lowering OC .…”

“…The conductivities of the gel polymer based electrolytes mainly depended on the oligomer size or molecular weight and salts used in the gel polymer electrolyte. LiI salt and PAN-based gel polymer [21] electrolytes are most frequently used in fabrication of DSCs in addition to mixed salts based gel electrolytes [22]. Therefore, this study is focused on developing the proper gel polymer electrolytes based on PAN and salts such as LiI and Pr 4 N + I − in addition to improving the performance of semiconductor material.…”

High Efficient Dye-Sensitized Solar Cells Based on Synthesized SnO2 Nanoparticles

“…Another possibility for the higher SC value of the device fabricated with the electrolyte is the formation of a more amorphous polymer network which helps transport triiodide ions. Coordination interaction in between CN groups of PAN and Li + ions will help formation of cross-linking site thus increasing amorphousness of gel polymer electrolyte [6].…”

“…The use of gel electrolytes instead of liquid electrolytes would help to circumvent the above-mentioned drawbacks to a certain extent as gel electrolytes have promising properties, such as thermal stability, nonflammability, and nonvolatility. In this study the quasi-solid-state dye-sensitized solar cells (QSDSCs) were fabricated using as-prepared SnO 2 /CaCO 3 composite working electrode and the gel electrolyte consists of propylene carbonate and ethylene carbonate as plasticizers, polyacrylonitrile as a polymer, acetonitrile as the solvent, 4tertiary butylpyridine as an electrolyte additive, and lithium iodide and tetrapropylammonium iodide as salts [6]. Additionally, this study was carried out with a metal-free organic dye, namely, indoline D358 dye, which has a high chelating ability ( = 13000).…”

Electrocatalytic and structural properties and computational calculation of PAN-EC-PC-TPAI-I2gel polymer electrolytes for dye sensitized solar cell application

“…78 The limiting current, exchange current and charge transfer resistance are also vital parameters for the DSSCs optimization. 79 According to the very recent review article published in 2020 by Teo et al 80 on polyacrylonitrile polymer host based GPEs for DSSCs application, PAN-EC-PC-TPAI-I 2 gel polymer electrolytes were reported to be promising for DSSC 74,[81][82][83][84][85][86][87][88] In this context, PAN-EC-PC-TPAI-I 2 gel polymer electrolytes were investigated in the present work, which included various characterizations, such as electrocatalytic performance, detailed vibrational study and XRD analysis. Also, we are reporting the computational calculation (frontier orbitals, HOMO-LUMO energy states, etc.)…”