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Gallium and indium co‐doped ZnO thin films for white light emitting diodes

2011; Wiley; Volume: 6; Issue: 1 Linguagem: Inglês

10.1002/pssr.201105455

1862-6270

Saraswathi Chirakkara, S. B. Krupanidhi,

Thin-Film Transistor Technologies

Abstract Ga and In co‐doped ZnO (GIZO) thin films together with ZnO, In‐doped ZnO (IZO), Ga‐doped ZnO (GZO), and IZO/GZO multilayer for comparison, were grown on corning glass and boron doped Si substrates by PLD. The photoluminescence spectra of GIZO showed a strong white light emission and the current–voltage characteristics showed relatively lower turn‐on voltage and larger forward current. The CIE coordinates for GIZO were observed to be (0.31, 0.33) with a correlated colour temperature of 6650 K, indicating a cool white light, and establishing a possibility of white light emitting diodes. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)