Toward Improved Device Efficiency and Stability of Organic Light‐Emitting Diodes via External Pressure Treatment

Abstract

Organic Light-Emitting Diodes Organic light‐emitting diode (OLED) is a potential light source for variable harsh environments ranging from external ornament pasting to fascinating space travel and deep‐sea exploration under high pressure. In article number http://doi.wiley.com/10.1002/pssa.202100120, Saihu Pan, Kunping Guo, Bin Wei, and co‐workers study the influence of external pressure on the specific organic functional layer and the whole OLEDs for their electrical and electroluminescence characteristics. It is worth noting that the green fluorescence OLED with a >12% increase in current efficiency by applying pressure of 0.75 MPa for 10 min with respect to the device without pressure treatment. Most interestingly, highly stable OLEDs with long operation lifetime are achieved by specific pressure condition, indicating positive effects of pressure treatment on device stability. Envisioning a bright future, it is reasonable to expect that this study provides a new strategy and insights for material development and high‐performance OLED application under extreme pressure conditions.