The Brazilian struck an injury-time free-kick to help the Blues beat the Swiss champions 2-1 at St Jakob-Park in the first leg and he is looking to complete the job at Stamford Bridge next week to progress to the final.
"It was important to score two goals here because Basel are a very good team and their philosophy to play good football is amazing. It is difficult to win here," said Luiz.
"It is amazing that we scored the second goal with the last kick but we have the second leg and we need to keep our minds strong because it will be another difficult game for us.
"I didn't see the penalty but if the referee gives a penalty then it is a penalty. 1-1 would have been okay but 2-1 is better. We are so happy with this.
"I want to get to the final this year and to do that we have to win the second leg or draw so it is not finished.
"The competition is so important for us. I want to win another European title for my career and for Chelsea."