Peters has moved to Feyenoord in a permanent transfer.
The 19-year-old joined the Bees from Fulham in the summer of 2023 on a two-year scholarship deal.
Brentford technical director Lee Dykes told the club's website: “We’re really pleased for Emeka – Feyenoord is a fantastic club with a proud history, and this is a great step for him.
“He’d expressed a desire to experience football in a new country, and after conversations with him and his family, we felt this move made a lot of sense for where he is in his development.
“It’s also a great reflection of the work that’s going on in our academy under Stephen Torpey and his team. Not every player will go on to play for Brentford’s first team, and that’s something we’re honest about.
"What’s important is that we support each individual’s journey and find the right path for them. For Emeka, that path has led to Feyenoord, and it shows the variety of opportunities available for our young players.
"Of course, the aim is always to see players break through here and go on to play Premier League football, but we also live by our academy purpose which is to be admired as the most caring and progressive football academy in the world, maximising player development and opportunity. We wish Emeka and his family all the best for what comes next.”