Add encoding utf8 to the function

Hello,

i have one plugin which sending notifications emails. Function for send mail is here:

public static function sendEmail($email)
        {
            require_once(ABSPATH . WPINC . '/class-phpmailer.php');
            $mail = new PHPMailer ();
            $mail->AddAddress($email ["to"]);
            $mail->IsMail();
            $mail->IsHTML();
            $mail->From = $email ["from"];
            $mail->FromName = $email ["from_name"];
            $mail->Subject = $email ["subject"];
            $mail->Body = $email ["body"];
            $rst = $mail->Send();
            return $rst;
        }

How i can add encoding utf8 to the this function?
Is this correct?

public static function sendEmail($email)
        {
            require_once(ABSPATH . WPINC . '/class-phpmailer.php');
            $mail = new PHPMailer ();
            $mail->AddAddress($email ["to"]);
            $mail->IsMail();
            $mail->IsHTML();

            $mail->setCharset = "UTF-8";

            $mail->From = $email ["from"];
            $mail->FromName = $email ["from_name"];
            $mail->Subject = $email ["subject"];
            $mail->Body = $email ["body"];
            $rst = $mail->Send();
            return $rst;
        }

Thank you.