Phase stability and orientation of SrCu2O2 films grown by pulsed laser deposition

Optical and microstructural properties of p-type SrCu2O2: First principles modeling and experimental studies

“…[7], obtaining nearly pure SrCu 2 O 2 phase only at a temperature of 500°C and an oxygen pressure of 10 − 4 Torr. Our results, in agreement with Kudo et al [7], show that is possible to grow SrCu 2 O 2 films with a pure phase at a temperature as low as 300°C and underline the importance of the phase purity of the PLD target (not achieved in the case of the work of Varadarajan et al [9]). …”

“…Kudo et al [7] previously reported the PLD deposition of SrCu 2 O 2 thin films having an SrCu 2 O 2 pure phase at 300°C and an oxygen pressure of 7 × 10 − 4 Torr. Recently Varadarajan et al [9] reported on phase stability of SrCu 2 O 2 films grown by PLD and they were unable to reproduce the results of Ref. [7], obtaining nearly pure SrCu 2 O 2 phase only at a temperature of 500°C and an oxygen pressure of 10 − 4 Torr.…”

“…In the initial work of Kudo et al [7] the lowest temperature required for obtaining single phase undoped SrCu 2 O 2 thin films was 300°C. Recent work from Bobeico et al [8] and Varadarajan et al [9], using e-beam evaporation [8] independently of process parameters while a temperature as high as 500°C was required for PLD to achieve nearly pure SrCu 2 O 2 phase [9]. Despite the promising properties of SrCu 2 O 2 as a p-type TCO prototype no work on its vibrational properties has been reported to date and no attempts have been made to measure the optical band gap of bulk polycrystalline SrCu 2 O 2 .…”

“…Despite the promising properties of SrCu 2 O 2 as a p-type TCO prototype no work on its vibrational properties has been reported to date and no attempts have been made to measure the optical band gap of bulk polycrystalline SrCu 2 O 2 . Moreover, while attempts have been made in recent reports [8,9] to gain a better understanding of the deposition kinetics of SrCu 2 O 2 thin films, the situation remains unclear.…”

Effect of thermal annealing on electrical and optical properties of Ba-doped SrCu2 O2 thin films on glass substrates

“…The phase diagram, based on the work of Suzuki et al [21], shows various Sr-Cu-O phase domains as a function of oxygen partial pressure and temperature for a fixed metal ratio of Cu:Sr ¼ 2:1 as in SrCu 2 O 2 [22]. Though the phase diagram of Sr-Cu-O system was set up from bulk material, Sr-Cu-O thin films undergo the same phase transformations with some deviation [23]. The integration of SCO thin films into functional devices has already been reported: transparent hetero pn-junctions have been fabricated by various researchers using SCO as p-type and ZnO as n-type TCO [16,[24][25][26][27].…”