Intensity Modulated Photocurrent Spectroscopy (IMPS) is a small-perturbation optoelectronic technique that measures the quantum efficiency of a photoelectrochemical device as a function of optical excitation frequency. Metal Halide Perovskites (MHPs) are mixed electronic–ionic semiconductors with an extraordinary complex optoelectronic behavior and a record efficiency surpassing 25%. In this paper, we propose a simplified procedure to analyze IMPS data in MHPs based on the analysis of the internal quantum efficiency and the time signals featuring in the frequency spectra. In this procedure, we look at the change of each signal when optical excitation wavelength, photon flux, and temperature are varied for an archetypical methyl ammonium lead iodide solar cell. We use drift-diffusion modeling and comparison with relatively simpler dye-sensitized solar cells (DSC) with viscous and non-viscous electrolytes to help us to understand the origin of the three signals appearing in MHP cells and the measurement of the internal quantum efficiency.
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7 October 2020
Research Article|
October 02 2020
Internal quantum efficiency and time signals from intensity-modulated photocurrent spectra of perovskite solar cells
Special Collection:
Hybrid Organic-Inorganic Halide Perovskites
Antonio Riquelme
;
Antonio Riquelme
1
Área de Química Física, Universidad Pablo de Olavide
, E-41013 Seville, Spain
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Francisco Enrique Gálvez;
Francisco Enrique Gálvez
1
Área de Química Física, Universidad Pablo de Olavide
, E-41013 Seville, Spain
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Lidia Contreras-Bernal
;
Lidia Contreras-Bernal
1
Área de Química Física, Universidad Pablo de Olavide
, E-41013 Seville, Spain
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Hernán Míguez
;
Hernán Míguez
2
Instituto de Ciencia de Materiales de Sevilla (CSIC), Consejo Superior de Investigaciones Científicas (CSIC)-Universidad de Sevilla
, Américo Vespucio 49, E-41092 Seville, Spain
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Juan A. Anta
Juan A. Anta
a)
1
Área de Química Física, Universidad Pablo de Olavide
, E-41013 Seville, Spain
a)Author to whom correspondence should be addressed: anta@upo.es
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a)Author to whom correspondence should be addressed: anta@upo.es
Note: This paper is part of the special collection on Hybrid Organic-Inorganic Halide Perovskites
J. Appl. Phys. 128, 133103 (2020)
Article history
Received:
May 10 2020
Accepted:
September 11 2020
Citation
Antonio Riquelme, Francisco Enrique Gálvez, Lidia Contreras-Bernal, Hernán Míguez, Juan A. Anta; Internal quantum efficiency and time signals from intensity-modulated photocurrent spectra of perovskite solar cells. J. Appl. Phys. 7 October 2020; 128 (13): 133103. https://doi.org/10.1063/5.0013317
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