An electrochemiluminescence and photothermal immunosensor based on a dual-modality integrated probe was proposed for sensitive and reliable detection of lipolysis stimulated lipoprotein receptor (LSR), a new biomarker of ovarian cancer. Black phosphorous quantum dots (BPQDs) possess fascinating electrochemical property and unique photothermal effect, which could not only enhance ECL signal of N-(4-aminobutyl)-N-ethylisoluminol (ABEI) through accelerating dissolved O