Can someone recommend me a motorized / electric device that can remove the skin, core out the seeds and slice the cucumber into pieces
You can try and get a super slicer. This will enable you to peel and also slice fruits and vegetable. This device is available in kitchen appliances store at around $13.05. Check out http://www.amazon.com/Super-Slicer-Professional-Mandoline/dp/B001105FFS.