We report the use of electrochemical capacitance-voltage profiling of n-type ZnSe layers by the use of NaOH electrolyte. Samples with both uniform and staircase doping profiles have been measured with concentrations ranging over 1016–1019 cm−3. The profiling technique has revealed in some samples regions of lower carrier concentration at the surface and at the ZnSe/GaAs interface. Our results demonstrate that this powerful technique can now be used for assessing the growth parameters of wideband gap II-VI materials in the same way that is widely accepted for III-V semiconductors.

We report the use 01 an electrochemical iodine cell to dope epitaxial ZnSe grown by molecular beam epitaxy over a range of carrier concentrations from 10" to 1O"cm -3. The doping levels throughout the layers have been measured by electrochemical CY profiling and staircase doping structures have been used to calibrate the doping level in terms of the cell flux. Photoluminescence and Hall data confirm t h e growth of well-behaved n-type ZnSe.

In support of investigating the effects of systematic archiving of authors' final peer‐reviewed, accepted manuscripts (green open access), PEER has developed a robust observatory infrastructure which has already successfully processed over 44,000 manuscripts. Technical challenges successfully overcome by the project include non‐uniformity of manuscript files and metadata formats, embargo management, and author authentication for repository deposit. Three areas of research investigating (i) author and reader attitudes and behaviours, (ii) article‐level usage at repositories and publisher platforms, and (iii) the economics of large‐scale archiving have been commissioned and are producing results. The baseline behavioural survey identified an increasing general awareness of open access, but a lower awareness of institutional and subject repositories. Perceptions were also found to vary depending on whether individuals were responding from an author or reader perspective. PEER itself has seen low uptake from authors when invited to self‐deposit into the project. Further results from all three research areas are due before the project ends in May 2012.