Perovskite Solar Cell Modeling Using Light- and Voltage-Modulated Techniques
Impacte
Scholar |
Altres documents de l'autoria: Ravishankar, Sandheep; Aranda Alonso, Clara; Sanchez, Sandy; Bisquert, Juan; Saliba, Michael; Garcia-Belmonte, Germà
Metadades
Mostra el registre complet de l'elementcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/160292
comunitat-uji-handle3:10234/160293
comunitat-uji-handle4:
INVESTIGACIONAquest recurs és restringit
https://doi.org/10.1021/acs.jpcc.9b01187 |
Metadades
Títol
Perovskite Solar Cell Modeling Using Light- and Voltage-Modulated TechniquesAutoria
Data de publicació
2019-02-27Editor
American Chemical SocietyCita bibliogràfica
RAVISHANKAR, Sandheep, et al. Perovskite Solar Cell Modeling Using Light-and Voltage-Modulated Techniques. The Journal of Physical Chemistry C, 2019, 123.11: 6444-6449.Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://pubs.acs.org/doi/abs/10.1021/acs.jpcc.9b01187Versió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
The analysis of the impedance spectroscopy (IS) data of perovskite solar cells (PSCs) has been challenging so far, with the low-frequency phenomena in particular yielding ambivalent results and interpretations. We ... [+]
The analysis of the impedance spectroscopy (IS) data of perovskite solar cells (PSCs) has been challenging so far, with the low-frequency phenomena in particular yielding ambivalent results and interpretations. We tackle this problem by carrying out intensity-modulated photocurrent spectroscopy (IMPS) measurements at open-circuit (OC) conditions on CH3NH3PbBr3 cells prepared by the flash infrared annealing method with different electron-selective contacts. We identify the existence of a capacitance of the order 10–4 F·cm–2 that is not discernible from IS measurements, which is attributed to the accumulation of anions at the perovskite/spiro-OMeTAD interface, which also likely includes an electronic component. This interface is a dominant recombination pathway at lower voltages and can account for the large disparity in fill factors observed in PSCs. By developing detailed models for the IMPS response at both OC and short-circuit conditions, we also confirm that the arcs observed in the upper quadrant of the IMPS spectra are not related to transport times, as is commonly interpreted, but time constants results from the combination of the series resistance and capacitors within the circuit. By combining the insights from IMPS and IS measurements, we develop a more complete equivalent circuit for PSCs that can be used as a basis for further research with different perovskite materials and contact layers. [-]
Proyecto de investigación
MINECO of Spain (MAT2016-76892-C3-1-R) ; Universitat Jaume I (UJI-B2017-32).Drets d'accés
Copyright © 2019 American Chemical Society
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/restrictedAccess
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/restrictedAccess
Apareix a les col.leccions
- INAM_Articles [506]