GoKawiilResearchers decode hidden chemistry behind perovskite LED additive, boost efficiency to 37.1%
Scientists studying perovskite light-emitting diodes found that a common additive, 5-aminovaleric acid, reacts in precursor solutions to form two distinct products: a beneficial zwitterion and a harmful lactam byproduct. By controlling which reaction pathway dominates and using the purified beneficial compound directly, they achieved perovskite films with 97.2% photoluminescence quantum yield and devices reaching a record 37.1% external quantum efficiency, with an average of 32.8%.
GoKawiil's interpretation of the reporting above, not reported fact.
The findings suggest that many additives used to improve perovskite films may be undergoing unrecognized chemical transformations, meaning their effects could stem from reaction byproducts rather than the intended molecule itself. This could prompt researchers to re-examine other additive chemistries across the field, potentially unlocking further efficiency gains by isolating beneficial reaction products rather than relying on unpurified mixtures.
- 5-aminovaleric acid splits into a helpful zwitterion and a harmful lactam during perovskite precursor processing
- Isolating and using only the beneficial zwitterion produced near-unity photoluminescence quantum yield of 97.2%
- Resulting PeLEDs reached a champion efficiency of 37.1%, with the approach potentially applicable to other additives and emission colors
Source: nature.com — Baek, 2026-10-14
Published there as: “Hidden reaction pathways inform additive engineering for perovskite LEDs”
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