What are the providers and aliases needed for dompdf/dompdf 0.8.1 in laravel 5.3

I have installed dompdf/dompdf with version 0.8.1 package for my laravel 5.3.My question is what providers and aliases classes do i have to give in my config/app.php file. I have given Barryvdh\DomPDF\ServiceProvider::class, and 'PDF' => Barryvdh\DomPDF\Facade::class,

But it showed error: Class 'Barryvdh\DomPDF\ServiceProvider' not found

via Chebli Mohamed