White multi-layered polymer light emitting diode through matrix assisted pulsed laser evaporation. Issue 32 (1st August 2016)

• Record Type: Journal Article
• Authors: Mariano, F.; Caricato, A. P.; Accorsi, G.; Leo, C.; Cesaria, M.; Carallo, S.; Genco, A.; Simeone, D.; Tunno, T.; Martino, M.; Gigli, G.; Mazzeo, M.
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 32(2016)
• Page Start: 7667
• Page End: 7674
• Publication Date: 2016-08-01
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6tc01826b
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : UV-MAPLE deposition technique can be exploited to deposit a multi-layered polymeric stack and allows for the fabrication of a white organic light-emitting device. Abstract : The development of alternative deposition techniques for conjugated polymeric compounds is an important step towards the fabrication of low cost multi-layered organic light emitting diodes suitable for display or lighting applications. In this work we show a white light-emitting polymeric hetero-structured diode consisting of three stacked blue, red and green light emitting polymers. In order to circumvent the issue of selecting orthogonal solvents in solution-deposition approaches, we combine spin-coating with a matrix-assisted pulsed laser evaporation technique, resulting in the realization of a polymeric multi-layered stack. By controlling the carriers and the energy transfer across the three light emitting layer interfaces, as well as the interplay between the deposition parameters, a pure white colour emission with Commission Internationale de l'Éclairage coordinates of ( X = 0.327, Y = 0.374) and a Color Rendering Index of 70 has been achieved. Our study represents the first proof of a light emitting diode made with multi-layer polymeric thin films emitting white light.