Lead-free tin halide perovskite LEDs with efficiency over 20% enabled by tautomeric superstructures

Metal-halide perovskites are promising for next-generation LEDs, but their practical deployment has been hampered by the toxicity of lead. In a recent study published in Nature, Han et al. developed efficient, lead-free perovskite LEDs with an efficiency of over 20%, matching the performance of state-of-the-art lead-containing LEDs. This was achieved through a novel “tautomeric-superstructure-coordination-induced electron localization strategy.” Metal-halide perovskites are promising for next-generation LEDs, but their practical deployment has been hampered by the toxicity of lead. In a recent study published in Nature, Han et al. developed efficient, lead-free perovskite LEDs with an efficiency of over 20%, matching the performance of state-of-the-art lead-containing LEDs. This was achieved through a novel “tautomeric-superstructure-coordination-induced electron localization strategy.”