Researchers make strides toward high-performance pure-red perovskite LEDs
Researchers from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences have addressed a critical challenge in perovskite light-emitting diodes (PeLEDs) by identifying and targeting the root cause of efficiency loss at high brightness, and enabled record-breaking device performance by introducing a novel material design.
Using a self-developed diagnostic tool called electrically excited transient absorption (EETA) spectroscopy, the researchers captured real-time carrier dynamics in operating devices. They found that the hole leakage into the electron transport layer-previously undetected due to a lack of in situ characterization methods-is the primary culprit behind efficiency roll-off.