How to send generated barcode to email in laravel?

I am using milon/barcode and it works fine in Laravel views, but the problems is while I send this view to email using Laravel Mail, it display the black div in my email. please help me how to resolve the issue. thanks

<div class="row">
    <?php echo DNS2D::getBarcodeHTML("4445645656", "QRCODE"); ?>
</div>

Result

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