The phrase is correct and usable in written English.
You can use it to refer to ideas that are unique and have not seen before. For example: The professor presented a few unprecedented ideas in her lecture that challenged the audience's understanding of the subject.
The motivation for the Carter Center was simple, he says: "We had an unprecedented idea".
This unprecedented idea, a flicker of electricity somewhere in the right hemisphere, was immediately recognized as the solution the prefrontal cortex had been searching for.
William Gates, Sr., then the head of the foundation, interviewed Beall about the unprecedented idea of correcting a mutated protein with a drug that could be taken orally, would work throughout the body, and would restore functioning of diseased organs.
This was an unprecedented idea.
Separating different sized holes with a porous partition instead of a conventional rigid partition is an unprecedented idea.
In Madness and Memory: The Discovery of Prions A New Biological Principle of Disease, Nobel laureate Stanley Prusiner describes the years of opprobrium and ridicule that accompanied his totally unprecedented idea, first advanced in the 1980s.
In his 1933 campaign, he had floated the unprecedented idea of government housing, and when he won, the White House offered to fund a New York City Housing Authority if the new mayor would set it up.
The unprecedented idea was to burn up the oil spill before it reached land.
It's not a completely unprecedented idea: In the extremely mediocre season 7 X-Files episode "Hollywood A.D ., Mulder and Scully were able to recreate Jesus' voice from the imprint it had made on some clay.
Elizabethan and Jacobean drama is not normally thought of primarily in terms of the information it disseminated, but it gave the illiterate among its audience unprecedented access to ideas and ideologies, stories fictive and historical, all affectively embodied and drawn from an impressive repertoire that ranged from the classical to the contemporary.
