  Neutrino-antineutrino conversion is an important new physics process. The
observation of this phenomenon could indicate total lepton number violation and
potential CPT-violation. Searching for the appearance of electron antineutrinos
from solar neutrinos from $\rm^8B$ decay allows us to hunt for this rare
process, although it can also be explained by other mechanisms or hypotheses.
This analysis examines the capabilities of observing neutrino-antineutrino
transition from $\rm^8B$ unoscillated solar neutrinos using different liquid
scintillator detector configurations. High energy reactor neutrinos and
atmospheric neutrinos are the two dominant background sources. Large volume
liquid scintillator detectors with deep underground shielding, placed far away
from reactors and with capabilities of pulse shaped discrimination will
significantly increase the search sensitivity. It is demonstrated that for the
next generation of large liquid scintillator detectors being planned or under
construction, the sensitivity to the average probability of
neutrino-antineutrino transitions can reach $10^{-6}$, which is an order of
magnitude better than the current best experimental limits.
