Quantum Dots: Origin of Positive Aging in Quantum‐Dot Light‐Emitting Diodes (Adv. Sci. 10/2018)

In the movie “The Curious Case of Benjamin Button”, Benjamin Button becomes younger and younger as time passes by. He experiences a “positive aging” life, which seems impossible in human beings, but becomes a reality in quantum-dot light-emitting diodes (QLEDs). In article number 1800549, Shuming Chen and co-workers report positive aging in QLEDs, i.e., efficiency increased with time. They disclose the origin of positive aging and provide a new insight into the exciton quenching mechanisms, which would be useful for constructing efficient QLED devices.