[en] Real time solar neutrino detectors are an urgent need, and they must be sensitive to the pp part of the spectrum. Combining the simultaneous detection of light and phonons (the luminescent bolometer) with fast single crystal scintillators of InP and InSb compounds, very good background rejection can be achieved. Its applications in dark matter and double beta decay detection are discussed. (K.A.) 30 refs., 2 figs