A high-temperature mass-spectrometric method for determination of the electron work function of ionic crystals: Lanthanum, cerium, and praseodymium triiodides

摘要

A mass spectrometric method for the determination of the electron work function based on analysis of thermochemical cycles including molecules and ions has been described. Application of this method for calculation of the electron work functions of lanthanum, cerium, and praseodymium triiodides gave 3.8 +/- 0.3 eV for LaI3, 3.5 +/- 0.3 eV for CeI3, and 2.8 +/- 0.3 eV for PrI3.