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dc.contributor.authorZhang, Hui
dc.contributor.authorKramarenko, Mariia
dc.contributor.authorMartínez-Denegri Sánchez, Guillermo
dc.contributor.authorOsmond, Johann
dc.contributor.authorMartorell Pena, Jordi
dc.contributor.otherUniversitat Politècnica de Catalunya. Doctorat en Fotònica
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física
dc.identifier.citationZhang, H. [et al.]. Formamidinium Incorporation into Compact Lead Iodide for Low Band Gap Perovskite Solar Cells with Open-Circuit Voltage Approaching the Radiative Limit. "ACS Applied materials and interfaces", 6 Març 2019, vol. 11, núm. 9, p. 9083-9092.
dc.description.abstractTo bring hybrid lead halide perovskite solar cells toward the Shockley-Queisser limit requires lowering the band gap while simultaneously increasing the open-circuit voltage. This, to some extent divergent objective, may demand the use of largecations to obtain a perovskite with larger lattice parameter together with a large crystalsize to minimize interface nonradiative recombination. When applying the two-stepmethod for a better crystal control, it is rather challenging to fabricate perovskites withFA+cations, given the small penetration depth of such large ions into a compact PbI2film. In here, to successfully incorporate such large cations, we used a high-concentration solution of the organic precursor containing small Cl-anions achieving,via a solvent annealing-controlled dissolution-recrystallization, larger than 1µmperovskite crystals in a solar cell. This solar cell, with a largely increasedfluorescencequantum yield, exhibited an open-circuit voltage equivalent to 93% of thecorresponding radiative limit one. This, together with the low band gap achieved(1.53 eV), makes the fabricated perovskite cell one of the closest to the Shockley-Queisser optimum.
dc.format.extent10 p.
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshPerovskite solar cells
dc.subject.otherSolar cells
dc.subject.otherOpen-circuit voltage
dc.subject.otherFluorescence quantum yield
dc.subject.otherRadiative limit
dc.titleFormamidinium Incorporation into Compact Lead Iodide for Low Band Gap Perovskite Solar Cells with Open-Circuit Voltage Approaching the Radiative Limit
dc.subject.lemacCèl·lules solars
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
local.citation.authorZhang, H.; Kramarenko, M.; Martínez-Denegri, G.; Osmond, J.; Martorell, J.
local.citation.publicationNameACS Applied materials and interfaces

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