The German averaged over 107 in reply, winning his only leg with a 13-darter, but Lukeman posted two 12-dart legs and sealed the victory with a 13-darter of his own to set up a clash with Rob Cross.
Daryl Gurney will now play Dirk van Duijvenbode following his 6-3 defeat of Connor Scutt, while Alan Soutar overcame Lukas Wenig by the same scoreline to set up a meeting with Damon Heta.
David Evans held off a fightback from Martijn Kleermaker - who hit back from 5-0 down to trail 5-3 at one stage - as he moves through to play Dimitri Van den Bergh on Saturday.
Scott Williams suffered a first round defeat for the first time on the European Tour, as former World Youth Champion Bradley Brooks set up a tie with Dave Chisnall with a 6-3 success, which included a key 136 checkout.
Luke Woodhouse edged through a tight contest against Keane Barry, hitting a second 11-darter of the game to force a deciding leg before surviving a missed match dart at the bull from the Irish ace before progressing to a tie with Ryan Searle.
Jamie Hughes came from 3-0 and 5-2 down - landing a 164 finish along the way - as he forced a deciding leg against Daniel Larsson, who landed a timely 180 as he edged through to meet top seed Luke Humphries in round two.
Jim Williams survived three missed match darts across two visits from Karel Sedlacek in a dramatic deciding leg to their tie, as he created an all-Welsh clash with recent NZ Darts Masters winner Jonny Clayton.
Dragutin Horvat hit back from 2-0 down to defeat Jeff Smith 6-4, and the Host Nation Qualifier now plays Jose de Sousa in Saturday's second round.
The pre-tournament withdrawals of Michael van Gerwen, Michael Smith, Adrian Lewis and Darren Webster meant that four players received a Bye in the first round.
Steve Beaton will now play Nathan Aspinall on Saturday, Lewy Williams takes on world number one Gerwyn Price, Ross Smith faces UK Open champion Danny Noppert and Joe Murnan meets Joe Cullen, last weekend's Hungarian Darts Trophy winner.
Saturday's second round sees the 16 seeded players enter the £140,000 event, with the tournament set to conclude on Sunday across two sessions in Jena.
First round results
David Evans 6-3 Martijn Kleermaker
Bradley Brooks 6-3 Scott Williams
Luke Woodhouse 6-5 Keane Barry
Daniel Larsson 6-5 Jamie Hughes
Jim Williams 6-5 Karel Sedlacek
Dragutin Horvat 6-4 Jeff Smith
Danny van Trijp 6-0 John Henderson
Geert Nentjes 6-0 Josh Rock
Daryl Gurney 6-3 Connor Scutt
Alan Soutar 6-3 Lukas Wenig
Raymond van Barneveld 6-0 Ian White
Martin Lukeman 6-1 Gabriel Clemens