The prevailing scientific understanding is that dark energy did not cause the Big Bang. The Big Bang theory describes the rapid expansion of the universe from a highly dense and hot state around 13.8 billion years ago. It is currently the most widely accepted explanation for the origin and evolution of the universe.
Dark energy, on the other hand, is a theoretical form of energy that is believed to exist and is thought to be responsible for the observed accelerated expansion of the universe. It is hypothesized to exert a repulsive gravitational force, counteracting the attractive force of gravity that would normally slow down the expansion. Dark energy is still not fully understood, and its exact nature and origin remain active areas of research in cosmology.
However, dark energy is not considered to be the cause of the Big Bang. The Big Bang is thought to have been triggered by a singularity, an extremely hot and dense state from which the universe rapidly expanded. The specifics of what caused the Big Bang, including what preceded it, are still subjects of investigation and speculation in cosmology.