The impact of magnetic field effects on the electroluminescence of organic light-emitting diodes is commonly used to characterize exciton dynamics such as generation, annihilation, and performance degradation. However, interpreting these effects is challenging. Here, we show that magnetic field effects in organic light-emitting diodes can be understood in terms of the magnetic response of device characteristics derived from polaron-pair and triplet exciton quenching processes, such as triplet-polaron interactions and triplet-triplet annihilation. Device degradation shows a clear relationship with the amplitude of the magnetic field effects, enabling non-destructive measurement of the degradation. The results and proposed mechanism provide a better understanding of magnetic field effects on organic light-emitting diodes and device degradation phenomena.

磁场对有机发光二极管电致发光的影响通常用于表征激子动力学，例如产生，an灭和性能下降。但是，解释这些影响具有挑战性。在这里，我们表明有机发光二极管中的磁场效应可以根据极化子对和三重态激子猝灭过程（例如三重态-极化子相互作用和三重态-三重态an灭）的器件特性的磁响应来理解。器件退化与磁场效应的幅度之间有着明显的关系，从而可以无损地测量退化。