The 25-year-old was unveiled to the media at Parc des Princes on Friday after joining PSG on a five-year deal for a world-record fee of €222million yesterday.
"It didn't impact my decision at all," said Neymar regarding talk he wished to be the main attraction. "I wanted to come to Paris and it was only linked to my desire for a new challenge, not because I didn't feel like a big star at Barcelona. This isn't what I'm looking for in Paris.
"I'm here for new trophies, new challenges and this is what motivates me. I want to dream bigger."
The Brazilian is looking forward to making his mark in the French capital.
"I'm really looking forward to starting to train with my new team-mates.
"It's a question of ambition. I want something bigger, a bigger challenge, and my heart made this decision and this is why I'm here.
"It was one of the most difficult decisions I've ever taken. I was at a great club, I love Barcelona and I have friends at the club. I had to think and re-think about what I want to achieve in my life."
Neymar will link up with compatriots Thiago Silva, Marquinhos, Lucas Moura and ex-Barca team-mate Dani Alves at the Ligue One giants. And while he said he spoke with his countrymen ahead of the move, he maintains their presence at the club held little say in deciding his future.
"I spoke to the Brazilian players here at PSG and of course they were very happy for me to come here," he said.
"To be really honest, it wouldn't have changed my approach at all [if Brazilians weren't here]. This wasn't an easy decision, as I've said. I wanted to think about what I wanted to do with my life.
"A lot of people wanted me to talk about it but it's very complicated when you're not sure about something. I wasn't 100 per cent sure about what I wanted to do. It was impossible for me to answer.
"But as soon as I made the decision, I started communicating. I'm very happy. I always ask my heart and it told me to go to PSG."