Composition dependence of photoluminescence properties of poly(9,9-di- n -hexylfluorenyl-2,7-diyl) with perovskite-structured SrTiO 3 nanocomposites

On the performance of polymer-inorganic perovskite oxide composite light-emitting diodes: The effect of perovskite SrTiO3 additives

“…The increase in luminance intensity is caused by overlapping of molecular orbitals of PHF and SrTiO 3 , which assist charge carriers to be transferred in the composite devices. The recorded EL intensity was observed to have the same increased pattern of the PL spectra intensity of PHF: SrTiO 3 thin films, 29 which is shown in Figure 4. The PL spectra of the PHF and PHF: SrTiO 3 composite thin films have two distinct peaks at 428 and 447 nm, except PHF:50% SrTiO 3 , which only have one distinct peak at 449 nm.…”

“…Inset is PL spectrum of the SrTiO 3 thin film, reproduced with permission. 29 Copyright 2016, Elsevier.…”

“…The discussion of composite ITO/PHF: SrTiO 3 /Al devices operating mechanism is closely associated with the energy level diagram. By referring the analysis method for obtaining HOMO-LUMO of PHF and SrTiO 3 CB-VB from the previous study, 29 the energy level diagram of PHF and SrTiO 3 thin films is schematically described in Figures S4 and S6 in Supplemental Material, respectively. Since PHF and SrTiO 3 were blended in a layer, there are two possible configurations of the formation of the devices, including ITO/SrTiO 3 /PHF/Al and ITO/PHF/SrTiO 3 /Al.…”

“…Photoluminescence spectra of the PHF and the PHF: SrTiO 3 composite thin films with a variation of the weight ratio of SrTiO 3 content (10-50%) to PHF weight. Inset is PL spectrum of the SrTiO 3 thin film, reproduced with permission 29. Copyright 2016, Elsevier.HOMO-LUMO of PHF and SrTiO 3 CB-VB from the previous study,29 the energy level diagram of PHF and SrTiO 3 thin films is schematically described in FiguresS4 and S6in Supplemental Material, respectively.…”

“…Photoluminescence spectra of the PHF and the PHF: SrTiO 3 composite thin films with a variation of the weight ratio of SrTiO 3 content (10-50%) to PHF weight. Inset is PL spectrum of the SrTiO 3 thin film, reproduced with permission 29. Copyright 2016, Elsevier.…”