Effect of Cs+ and K+ incorporation on the charge carrier lifetime, device performance and stability in perovskite solar cells
Por:
Kumar, Y., Regalado-Perez, E., Jeronimo-Rendon, Jose J., Mathew, X.
Publicada:
1 mar 2022
Resumen:
Incorporation of a third monovalent cation has been shown to improve the
perovskite solar cell performance and stability. In this work, an
in-depth study has been carried out to understand the effect of Cs+ and
K+ cations on charge carrier dynamics in methylammonium-Formamidinium
based solar cell. Different spectroscopic techniques together with
electrical studies have been employed to determine the role of these
cations on the charge carrier traps, charge transport, charge carrier
extraction, recombination, etc. Incorporation of Cs+ leads to superior
crystallinity and larger grains resulting in improved passivation,
reduction of non-radiative losses and improved charge transport within
the perovskite layer which resulted in improved cell performance than
that with K+ incorporated device. The PL quenching at short-circuit,
high recombination resistance deduced from the impedance spectra, lowest
Urbach energy, and high electroluminescence of the Cs+ incorporated
perovskite concur with the large and colunmnar grain growth with Cs+
incorporation. With Cs+, the device efficiency reach 19.8% with high
fill factor of 80.28%, whereas K+ incorporated devices demonstrate only
16.16% efficiency with a fill factor of 71.76%. Although K+
substitution leads to better stability, MAFA:Cs+ devices are superior in
terms of cell performance.
Filiaciones:
Kumar, Y.:
Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Temixco, Morelos 62580, Mexico
Univ Nacl Autonoma Mexico, Inst Energias Renovables, Temixco 62580, Morelos, Mexico
Regalado-Perez, E.:
Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Temixco, Morelos 62580, Mexico
Instituto de Física Luis Rivera Terrazas, Benemérita Universidad Autónoma de Puebla, Ecocampus Valsequillo, San Pedro Zacachimalpa, Puebla, 72960, Mexico
Univ Nacl Autonoma Mexico, Inst Energias Renovables, Temixco 62580, Morelos, Mexico
Benemerita Univ Autonoma Puebla, Inst Fis Luis Rivera Terrazas, Ecocampus Valsequillo, Puebla 72960, San Pedro Zacac, Mexico
Jeronimo-Rendon, Jose J.:
Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Temixco, Morelos 62580, Mexico
Univ Nacl Autonoma Mexico, Inst Energias Renovables, Temixco 62580, Morelos, Mexico
Mathew, X.:
Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Temixco, Morelos 62580, Mexico
(Corresponding Author), Univ Nacl Autonoma Mexico, Inst Energias Renovables, Temixco 62580, Morelos, Mexico
Univ Nacl Autonoma Mexico, Inst Energias Renovables, Temixco 62580, Morelos, Mexico
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