Direct identification of interfacial degradation in blue OLEDs using nanoscale chemical depth profiling.

ABSTRACT: Understanding the degradation mechanism of organic light-emitting diodes (OLED) is essential to improve device performance and stability. OLED failure, if not process-related, arises mostly from chemical instability. However, the challenges of sampling from nanoscale organic layers and interfaces with enough analytical information has hampered identification of degradation products and mechanisms. Here, we present a high-resolution diagnostic method of OLED degradation using an Orbitrap mass spectrometer equipped with a gas cluster ion beam to gently desorb nanometre levels of materials, providing unambiguous molecular information with 7-nm depth resolution. We chemically depth profile and analyse blue phosphorescent and thermally-activated delayed fluorescent (TADF) OLED devices at differ

SUBMITTER: Trindade GF 

PROVIDER: S-EPMC10698160 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature