6533b7d8fe1ef96bd126a390

RESEARCH PRODUCT

External quantum efficiency measurements used to study the stability of differently deposited perovskite solar cells

Anderzon F. Palechor-ocampoJorge CaramJorge CaramJavier Alejandro SchmidtJavier Alejandro SchmidtHenk J. BolinkDaniel Pérez-del-reyFederico VentosinosFederico VentosinosPedro Hierrezuelo-cardet

subject

Materials scienceInfraredGeneral Physics and Astronomy02 engineering and technology01 natural sciencesInstability//purl.org/becyt/ford/1 [https]EQE0103 physical sciencesMaterialsCèl·lules fotoelèctriques010302 applied physicsSpin coatingSTABILITYbusiness.industryPhotovoltaic systemSOLAR CELLS//purl.org/becyt/ford/1.3 [https]021001 nanoscience & nanotechnologyPEROVSKITES//purl.org/becyt/ford/2 [https]OptoelectronicsQuantum efficiencyAbsorbent material0210 nano-technologybusiness//purl.org/becyt/ford/2.5 [https]

description

The instability exhibited by perovskite solar cells when exposed to the environment under illumination is one of the major obstacles for the entry of perovskite technology in the photovoltaic market. In this work, we use the external quantum efficiency (EQE) technique to study the photoinduced degradation of two types of solar cells having CH3NH3PbI3 as an absorber layer: one deposited by spin coating with an n-i-p architecture and the other deposited by evaporation with an inverted p-i-n structure. We also study the effect of different encapsulants to protect the cells against atmospheric agents. We find that EQE provides information regarding the areas of the cell most susceptible to degradation, in addition to providing an estimate of the optical gap and the Urbach energy of the absorbent material. We confirm that the combined action of illumination and the environment markedly accelerate the degradation, which is reflected in the deterioration of all the parameters of the cell. The rear part of the cell is the first region to suffer the light-induced degradation. On the other hand, the cells deposited by evaporation and with a good encapsulation process are highly stable since after 30 h of exposure just a small spectral change is noticed in the red/infrared region of the EQE spectrum. Fil: Hierrezuelo Cardet, Pedro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Física del Litoral. Universidad Nacional del Litoral. Instituto de Física del Litoral; Argentina Fil: Palechor Ocampo, Anderzon Felipe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Física del Litoral. Universidad Nacional del Litoral. Instituto de Física del Litoral; Argentina Fil: Caram, Jorge Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Física del Litoral. Universidad Nacional del Litoral. Instituto de Física del Litoral; Argentina Fil: Ventosinos, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Física del Litoral. Universidad Nacional del Litoral. Instituto de Física del Litoral; Argentina Fil: Pérez Del Rey, Daniel. Universidad de Valencia; España Fil: Bolink, Henk J.. Universidad de Valencia; España Fil: Schmidt, Javier Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Física del Litoral. Universidad Nacional del Litoral. Instituto de Física del Litoral; Argentina

yearjournalcountryeditionlanguage
2020-01-01
10.1063/5.0011503http://aip.scitation.org/doi/10.1063/5.0011503