Spacer insertion unlocks efficiency in low-voltage exciplex OLEDs, finds study (IMAGE)
Caption
Exciplex OLEDs are a type of organic light-emitting diodes that achieve efficient light emission at lower driving voltages, enabling higher energy efficiency and longer lifetimes. However, finding suitable donor/acceptor material combinations for efficient energy transfer to the emitter restricts material choices and device performance. Now, researchers from Japan have found that adding a tiny, 3-nanometer spacer between donor and acceptor layers in exciplex OLEDs improves energy transfer and boosts light emission. Adding the spacer led to a 77-fold increase in external quantum efficiency, successfully activating devices that previously showed poor energy transfer.
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Reprinted (adapted) with permission from doi/10.1021/acsaom.5c00014. Copyright 2025 American Chemical Society. Image source link: https://pubs.acs.org/doi/10.1021/acsaom.5c00014
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