AI Article Synopsis
- Achieving efficient blue electroluminescence in perovskite light-emitting diodes (PeLEDs) is a key challenge hindering their commercial use.
- The inefficiency primarily comes from poor blue perovskite emitters, which are affected by mixed halide strategies and reduced-dimensional approaches.
- This research introduces high-performing sky-blue PeLEDs that exceed 15% external quantum efficiency by using a molecular modifier, 4,4'-Difluorophenone, to reduce non-radiative loss and improve the structure of quasi-2D blue perovskites.
Article Abstract
Achieving efficient blue electroluminescence (EL) remains the fundamental challenge that impedes perovskite light-emitting diodes (PeLEDs) towards commercial applications. The bottleneck accounting for the inefficient blue PeLEDs is broadly attributed to the poor-emissive blue perovskite emitters based on either mixed halide engineering or reduced-dimensional strategy. Herein, we report the high-performing sky-blue PeLEDs (490 nm) with the maximum EQE exceeding 15 % by incorporating a molecular modifier, namely 4,4'-Difluorophenone, for significantly suppressing the non-radiative recombination and tuning of the low-dimensional phase distribution of quasi-2D blue perovskites, which represents a remarkable paradigm for developing the new generation of blue lighting sources.
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| http://dx.doi.org/10.1002/anie.202219255 | DOI Listing |
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