How to render a custom field in a view

Hi,

I create a module for generating a custom field in a view.

It works but the $phrase generate is not html because the sentence is contained in quotation marks.

<div>
	<span>

	<!-- THEME DEBUG -->
	<!-- THEME HOOK: 'views_view_field' -->
	<!-- BEGIN OUTPUT from 'core/themes/stable/templates/views/views-view-field.html.twig' -->
	"	
		<div class="phrase">1 appartement neuf <br><img alt="Sigle Habitec" src="/themes/contrib/almede/images/cigle.png"><br><div class="prix">167 000 €</div></div>
	"
	<!-- END OUTPUT from 'core/themes/stable/templates/views/views-view-field.html.twig' -->

	</span>
</div>

How to remove these quotes?

<?php

namespace Drupal\views_custom_field\Plugin\views\field;

use Drupal\Core\Form\FormStateInterface;
use Drupal\Component\Utility\Random;
use Drupal\views\Plugin\views\field\FieldPluginBase;
use Drupal\views\ResultRow;

/**
 * A handler to provide a field that is completely custom by the administrator.
 *
 * @ingroup views_field_handlers
 *
 * @ViewsField("_custom_views_field")
 */
class _customViewsField extends FieldPluginBase {

  /**
   * {@inheritdoc}
   */
  public function usesGroupBy() {
    return FALSE;
  }

  /**
   * {@inheritdoc}
   */
  public function query() {
    // Do nothing -- to override the parent query.
  }

  /**
   * {@inheritdoc}
   */
  protected function defineOptions() {
    $options = parent::defineOptions();

    $options['hide_alter_empty'] = ['default' => FALSE];
    return $options;
  }

  /**
   * {@inheritdoc}
   */
  public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    parent::buildOptionsForm($form, $form_state);
  }

  /**
   * {@inheritdoc}
   */
  public function render(ResultRow $values) {
    // Return a random text, here you can include your custom logic.
    // Include any namespace required to call the method required to generate
    // the desired output.
    //$random = new Random();
    //return $random->name();
     

if ($this->view->current_display=='block_offre' || $this->view->current_display=='block_residence' || $this->view->current_display=='block_terrains') {

      //on load le noeud
      $node = $values->_entity;
      
    //on calcul le nombre de lots
     $nb = 0;
     $prix = [];
     foreach ($node->field_lots as $lot) {
     //dpm($lot->target_id);
     
     if ($prix) {
        $prix_leplus_bas = min($prix);
             
		if ($nb==1) {
		
			$phrase ='<div class="phrase">'.$nb.' appartement neuf '.'<br>'.'<img alt="Sigle Habitec" src="/themes/contrib/almede/images/cigle.png">'.'<br>'.'<div class="prix">'.$prix_leplus_bas.' €'.'</div>'.'</div>';
		
		} 
        break;
        

       
       if ($nb > 0 && isset($phrase)){
        return $phrase ;
        }
        
     }
      
    }

  }//render
}//class