Open a link in device browser window from iFrame

In Ionic project, I had loaded my Responsive Website URL in an iFrame and it looks fine. But there are few anchor links in my website which will open a new window, for eg :

<a href="" target="_blank"> Devices List </a>

This is working fine for Desktop browsers, but the same is not opening any new window or not even opening in default browser. Am seeing this problem only with iFrame. I tried with Different targets and also used InAppBrowser, no progress.