RT Journal Article
T1 PVP-LiClO4: CdTe quantum dots gel polymer electrolyte as the key element for simplified photosupercapacitor devices
A1 Peinado-Pérez, Juan José
A1 Sánchez-Caballero, Abraham
A1 Martín-Jiménez, Francisco de Paula
A1 Algarra, Manuel
A1 Jiménez-Jiménez, José
A1 López-Escalante, María Cruz
K1 Células solares
K1 Coloides poliméricos
K1 Materiales nanocompuestos
AB Electrolytes in the form of polymer gels are of great interest to industry due to their versatility, which is increased by the incorporation of nanofillers. The doctor blade technique was used to add different amounts of cadmium telluride quantum dots (CdTe QDs) (0 %, 2.0 %, 5.0 %, 7.0 % and 9.0 % by weight) to a polyvinylpyrrolidone (PVP) base containing lithium perchlorate (PVP-LiClO₄). The results show that the presence of quantum dots modifies the surface morphology and causes changes in the vibrational signals, particularly those of the carbonyl group. It also modifies the absorption spectra of the electrolytes, affecting their direct band gap (from 4.92 eV to 4.64 eV) and indirect band gap (from 5.20 eV to 5.12 eV). Impedance spectroscopy analysis (Z' y Z'), performed in the dark, shows that increasing the amount of nanofillers in the electrolyte reduces its overall resistance due to the increase in carrier concentration. However, under illumination, blocking conditions are reached as the generated charge carriers recombine with the polymer vacancies, thereby confining the lithium ions. The flow of photogenerated electrons can be harnessed when the electrolyte is assembled with a bismuth vanadate (BiVO₄) photoanode, thanks to complementary band structures, and a poly(3,4-ethylenedioxythiophene) (PEDOT:PSS) cathode. The result is a device that can be characterized as both a solar cell and a photocapacitor. Overall efficiency improves when the device is characterized with unfilled electrolytes and 9.0 wt% CdTe QDs. The efficiency of the solar cell increases from 0.0075 % to 0.0307 %, and the overall efficiency of the photocapacitor increases from 0.028 % to 0.047 %.
PB Elsevier
YR 2026
FD 2026
LK https://hdl.handle.net/10630/45303
UL https://hdl.handle.net/10630/45303
LA eng
NO Juan José Peinado-Pérez, Abraham Sánchez-Caballero, Francisco Martín, Manuel Algarra, José Jiménez-Jiménez, María Cruz López-Escalante, PVP-LiClO4: CdTe quantum dots gel polymer electrolyte as the key element for simplified photosupercapacitor devices, Journal of Energy Storage, Volume 146, 2026, 120107, ISSN 2352-152X, https://doi.org/10.1016/j.est.2025.120107.
NO Funding for open access charge: Universidad de Málaga / CBUA
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 27 feb 2026