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dc.contributor.authorJaramillo Quintero, Óscar A.
dc.contributor.authorSánchez, Rafael
dc.contributor.authorRincón, M. E.
dc.contributor.authorMora-Sero, Ivan
dc.identifier.citationJARAMILLO-QUINTERO, Oscar A., et al. Bright visible-infrared light emitting diodes based on hybrid halide perovskite with Spiro-OMeTAD as a hole-injecting layer. The journal of physical chemistry letters, 2015, vol. 6, no 10, p. 1883-1890.ca_CA
dc.description.abstractHybrid halide perovskites that are currently intensively studied for photovoltaic applications, also present outstanding properties for light emission. Here, we report on the preparation of bright solid state light emitting diodes (LEDs) based on a solution-processed hybrid lead halide perovskite (Pe). In particular, we have utilized the perovskite generally described with the formula CH3NH3PbI3-xClx and exploited a configuration without electron or hole blocking layer in addition to the injecting layers. Compact TiO2 and Spiro-OMeTAD were used as electron and hole injecting layers, respectively. We have demonstrated a bright combined visible-infrared radiance of 7.1 W·sr–1·m–2 at a current density of 232 mA·cm–2, and a maximum external quantum efficiency (EQE) of 0.48%. The devices prepared surpass the EQE values achieved in previous reports, considering devices with just an injecting layer without any additional blocking layer. Significantly, the maximum EQE value of our devices is obtained at applied voltages as low as 2 V, with a turn-on voltage as low as the Pe band gap (Vturn-on = 1.45 ± 0.06 V). This outstanding performance, despite the simplicity of the approach, highlights the enormous potentiality of Pe-LEDs. In addition, we present a stability study of unsealed Pe-LEDs, which demonstrates a dramatic influence of the measurement atmosphere on the performance of the devices. The decrease of the electroluminescence (EL) under continuous operation can be attributed to an increase of the non-radiative recombination pathways, rather than a degradation of the perovskite material itself.ca_CA
dc.description.sponsorShipThis work was supported by the Universitat Jaume I (project 12I361.01/1), Spanish MINECO (project MAT2013-47192- C3-1-R). Finantial support to projects PAPIIT-UNAM (IN106912), CONACyT-Me xico (153270), and the fellowship given to O.A.J.-Q. by CONACYT-Me xico are also acknowl- edged. Authors acknowledge E. J. Juarez-Perez for the capacitance measurements of fresh and degraded perovskiteca_CA
dc.format.extent7 p.ca_CA
dc.publisherAmerican Chemical Societyca_CA
dc.relation.isPartOfJ. Phys. Chem. Lett., 2015, 6 (10)ca_CA
dc.rightsCopyright © 2015 American Chemical Societyca_CA
dc.subjecthalide perovskitesca_CA
dc.subjectlight-emitting diodesca_CA
dc.subjectexternal quantum efficiencyca_CA
dc.titleBright visible-infrared light emitting diodes based on hybrid halide perovskite with Spiro-OMeTAD as a hole-injecting layerca_CA

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