Lead-free perovskite Rb2Sn1−xTexCl6 with bright luminescence for optical thermometry and tunable white light emitting diodes

Te 4+ -doped Rb 2 SnCl 6 MCs are prepared by the solvothermal method, which have strong and broad emission. The long fluorescence lifetime and high PLQY make it have good application prospect in optical thermometry and white LED.