"It is with much joy, pride and ambition that I am joining this big club", Tuchel said. "Along with my staff, I will do everything I can to help the team push the envelope right up to the highest worldwide level".
Elaborating further on some of the positives, the 46-year-old added: "Well I improved my French, I am feeling closer towards Paris itself, I now know how the sentence "Ici c'est Paris" really means something special".
"I'm also looking forward to discovering the Parc des Princes, a legendary stadium of European football, where there is a fantastic atmosphere".
"So many things have been positive, and I also take the negative things as it helps in the growing process of the club, but also mine".
Emery announced his departure back in April, after a decision was reached not to renew his two-year contract. Conte is still expected to leave the club in the summer with Luis Enrique believed to be the man to step in.More news: Rage 2 First Gameplay Trailer Revealed, New Story Details Included
They had been on the look-out for a replacement for Emery since being beaten 5-2 on aggregate by Real Madrid in the last 16 of the Champions League in March.
He added: "He is strongly imbued with the principles of spectacular and clinical football that have always been at the heart of German football, especially on the worldwide scene".
Tuchel spent two years at the German giants after succeeding Liverpool manager Jurgen Klopp in 2015. "His ambitious personality, his stated predilection for attacking football and his strength of character are all in keeping with the style that we have wanted to instil here at Paris Saint-Germain".
Emery, who was named coach of the year after guiding PSG to a domestic treble, will be in charge of his final French league game this weekend at Caen.