| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1263895 | Organic Electronics | 2013 | 6 Pages |
We report the effect of yellow Sr2SiO4:Eu2+ and green SrGa2S4:Eu2+ phosphors on the efficiency of organic photovoltaic (OPV) cells. Each phosphor was coated on the back side of indium tin oxide (ITO)/glass substrates by spin coating with poly(methyl methacrylate) (PMMA). The maximum absorption wavelength of the active layer in the OPV cells was ∼512 nm. The emission peaks of Sr2SiO4:Eu2+ and SrGa2S4:Eu2+ were maximized at 552 nm and 534 nm, respectively. The short circuit current density (Jsc) and power conversion efficiency (PCE) of the OPV cells with Sr2SiO4:Eu2+ (8.55 mA/cm2 and 3.25%) and with SrGa2S4:Eu2+ (9.29 mA/cm2 and 3.3%) were higher than those of the control device without phosphor (7.605 mA/cm2 and 3.04%). We concluded that phosphor tuned the wavelength of the incident light to the absorption wavelength of the active layer, thus increasing the Jsc and PCE of the OPV cells.
Graphical abstract.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The Jsc and PCE of the OPV cells with Sr2SiO4:Eu2+ are 8.55 mA/cm2 and 3.25%. ► The Jsc and PCE of the OPV cells with SrGa2S4:Eu2+ are 9.29 mA/cm2 and 3.3%. ► These values are higher than those of the control device without phosphor (7.605 mA/cm2 and 3.04%).
