No. He did stray pretty close to the dark side though, under Jacen's tutelage. He eventually figured out that he was heading down a dark path. The final thing that pushed him completely away from Jacen was Jacen murdering his mother.
Han says it in Invincible:
Ben: "I did some pretty terrible things, and no one gave up on me." Han: "You got a little confused, kid. That happens. But you didn't go around killing family members and burning planets."