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Perovskite light‐emitting diodes (PeLEDs) emerge as a promising class of optoelectronic devices for next‐generation displays and lighting technology. However, the performance of blue PeLEDs lags far behind that of their green and red counterparts, including the unachieved trade‐off between high efficiency and high luminance, severe efficiency roll‐off, and unsatisfactory power efficiency. Here, a...
Rational engineering of the surface properties of perovskite nanocrystals (PeNCs) is critical to obtain light emitters with simultaneous high photoluminescence efficiency and excellent charge transport properties for light‐emitting diodes (LEDs). However, the commonly used lead halide sources make it hard to rationally optimize the surface compositions of the PeNCs. In addition, previously developed...
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