Yet.
The whole point of Aizen's betrayal and obtaining that device from Rukia, was to push himself to the limit. He'd mastered the shinigami arts, and noted that when a shinigami, or hollow, reaches the peak of its power, the only way to break that barrier was to take on the powers of the other.
If Aizen went to all that trouble, to make the Arrancar, do you honestly think he didn't bother to use Hollowfication on himself to make him Visored?
And considering Kisuke created, and lead the research into Hollowfication, and the decive, it only seems logical that he has the ability too. If not when Aizen used it on Rinji and co, then he will by now.
Remember, they've had all this free time. Training, waiting for their moment.