Cumulative lifetime enhancement effect of deuteration in blue organic light‐emitting diodes

• DOI: 10.1002/jsid.1270
• Publication Date: 2024-02-22T13:51:04Z
• Authors: Jingwen Yao; Ye‐Xin Zhang; Ching W. Tang; Shou‐Cheng Dong
• Keywords: Kinetic isotope effect; Degradation

Abstract This research investigates the impact of deuteration on operational lifetime blue organic light‐emitting diodes (OLEDs). Our study focuses kinetic isotope effect (KIE) and how it enhances device lifetime. Specifically, we examine effects OLEDs with emitters based common polycyclic aromatic hydrocarbons by deuterating anthracene‐based host materials. findings show that deuterated analogues incremental deuterium substitutions exhibit similar electroluminescence (EL) performances but progressively prolonged lifetimes as a function deuteration, indicating cumulative enhancement effect. We observed twofold increase in partial substitutions, while highly hosts realized up to fourfold improvement. Furthermore, found degradation is initiated from interface hole transport layer (HTL) emitting (ETL), can mitigate degraded reactions devices, thereby improving stability. These results provide insight into OLEDs, which has important implications for developing more efficient durable OLED