Electronic structure of CuCrO2 thin films grown on Al2O3(001) by oxygen plasma assisted molecular beam epitaxy

Abstract

Electronic structure of CuCrO2 thin films grown on Al2O3(001) by oxygen plasma assisted molecular beam epitaxy.

Transparent conductive CuCrO2thin films deposited by pulsed injection metal organic chemical vapor deposition: up-scalable process technology for an improved transparency/conductivity trade-off

“…This absorption is in line with the previously reported studies on the delafossite CuCrO 2 phase. 37,39,72,73 However, another steep increase of the absorption is noticed at 2.5 eV for x Z 0.66. This absorption edge at 2.5 eV is particularly steep for the Cu 2 O reference coating (w = 1).…”

Atomic layer deposition of transparent semiconducting oxide CuCrO2 thin films

“…36 There are many methods available for the preparation of CuCrO2 thin films and coatings, such as reactive sputtering deposition, 37,38 pulsed laser deposition, 39,40,41,42 chemical solution deposition, 43,44,45,46 and molecular beam epitaxy. 47 However, these techniques may not be vital for the depositions where a precise thickness control (of the order of sub-nanometer) over a large-area and/or nanostructured substrate is required. 48,49 Atomic layer deposition (ALD) 50 is an advanced thin-film technique that affords precise film-thickness control owing to its unique deposition mechanism based on sequential and repeated exposure of precursor vapors that undergo self-limiting surface reactions.…”

X-ray spectroscopic studies of the electronic structure of chromium-basedp-type transparent conducting oxides

“…However, particularly in the case of CuCrO 2 , valence band changes have been reported in crystalline thin films due to surface preparation [12]. As our Cu x CrO y thin films on glass are polycrystalline in nature, they will not have a coherent surface termination unlike in situ cleaved single crystals.…”

“…In addition, the polycrystalline nature of thin films of glass will not have a coherent surface termination as in situ cleaved films, leading to the loss of fine structure in our measurements. It has been previously reported that the surface termination can significantly alter the valence-band shape in CuCrO 2 [12].…”

“…The delafossite structure, ABO 2 , has an A cation site linearly coordinated to the oxygen octahedra within which the B site cation resides. In particular, cuprous delafossites exhibit exceptional electrical, magnetic, and optical properties [12].…”