p‐type transparent conducting oxides

Abstract

The recent advance of p‐type transparent conductive oxide thin films is reviewed. The focus is on p‐type transparent oxide semiconductors CuAlO2, CuGaO2, CuInO2, SrCu2O2, and LaCuOCh (Ch = chalcogen). These materials and related device applications are then shown as examples. Room temperature operation of current injection emission from ultraviolet light‐emitting diodes based on p‐SCO/n‐ZnO p–n junctions has been demonstrated. This changed with the discovery of p‐type transparent conducting oxides, thereby opening up the possibility for all‐oxide transparent electronics. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Multiferroic CuCrO2 under high pressure: In situ X-ray diffraction and Raman spectroscopic studies

“…However, transparent conducting oxides (TCO) [1][2][3][4][5] are good electrical conductors and simultaneously transparent to optical photons. Depending upon the donor or acceptor level in the band gap of such a material these are classified as either p-type or n-type TCO.…”

Transparent Conductive Oxide (TCO) Films for Organic Light Emissive Devices (OLEDs)

“…For the synthesis of CuAlO 2 thin films, the groups of Hosono, Gong, and Chattopadhyay used pulsed laser deposition, plasma-enhanced metalorganic chemical vapor deposition(PE-MOCVD), and dc sputtering, respectively. (Sheng et al, 2006) The electronic structures of CuAlO 2 were experimentally probed by normal/inverse photoemission spectroscopy(PES/IPES). The Fermi energy determined experimentally was set to zero in the energy scale in the three spectra, as shown in Fig.…”

“…The conductivity at room temperature was about 5.6×10 −3 S·cm -1 . (Sheng et al, 2006) The electrical conductivity, carrier (positive hole) density, and Hall mobility of epitaxial CuGaO 2 films at room temperature were respectively 6.3 × 10 −2 S·cm -1 , 1.7 × 10 18 cm 3 , and 0.23 cm 2 ·V -1 ·s -1 , which were prepared on a-Al 2 O 3 (001) singlecrystal substrates by PLD without post-annealing treatment and it were superior to those of the polycrystalline thin films of CuGaO 2 . The films were grown epitaxially on the substrates in an as-deposited state.…”

Mechanism forp-type conduction in polycrystalline indium oxide films

“…6 Since then several p-type TCO, including technologically important ZnO, have been obtained. 7,8 As other transparent conducting oxides, IO shows many interesting physical attributes, and though it has been extensively studied, some of its fundamental properties are only just emerging. A recent impressive improvement in material quality has enabled researchers to establish the nature of the IO band gap.…”