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核心技术专利：CN118964589B侵权必究

Suppr 超能文献

核心技术专利：CN118964589B侵权必究

Sun Changjiu, Jiang Yuanzhi, Cui Minghuan, Qiao Lu, Wei Junli, Huang Yanmin, Zhang Li, He Tingwei, Li Saisai, Hsu Hsien-Yi, Qin Chaochao, Long Run, Yuan Mingjian

Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center (RECAST), College of Chemistry, Nankai University, Tianjin, P. R. China.

Henan Key Laboratory of Infrared Materials and Spectrum Measures and Applications, School of Physics, Henan Normal University, Xinxiang, P. R. China.

Nat Commun. 2021 Apr 13;12(1):2207. doi: 10.1038/s41467-021-22529-x.

Serious performance decline arose for perovskite light-emitting diodes (PeLEDs) once the active area was enlarged. Here we investigate the failure mechanism of the widespread active film fabrication method; and ascribe severe phase-segregation to be the reason. We thereby introduce L-Norvaline to construct a COO-coordinated intermediate phase with low formation enthalpy. The new intermediate phase changes the crystallization pathway, thereby suppressing the phase-segregation. Accordingly, high-quality large-area quasi-2D films with desirable properties are obtained. Based on this, we further rationally adjusted films' recombination kinetics. We reported a series of highly-efficient green quasi-2D PeLEDs with active areas of 9.0 cm. The peak EQE of 16.4% is achieved in = 3, represent the most efficient large-area PeLEDs yet. Meanwhile, high brightness device with luminance up to 9.1 × 10 cd m has achieved in = 10 film.

Sun Changjiu, Jiang Yuanzhi, Cui Minghuan, Qiao Lu, Wei Junli, Huang Yanmin, Zhang Li, He Tingwei, Li Saisai, Hsu Hsien-Yi, Qin Chaochao, Long Run, Yuan Mingjian

Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center (RECAST), College of Chemistry, Nankai University, Tianjin, P. R. China.

Henan Key Laboratory of Infrared Materials and Spectrum Measures and Applications, School of Physics, Henan Normal University, Xinxiang, P. R. China.

Nat Commun. 2021 Apr 13;12(1):2207. doi: 10.1038/s41467-021-22529-x.

一旦钙钛矿发光二极管（PeLEDs）的有源区扩大，就会出现严重的性能下降。在这里，我们研究了广泛使用的有源膜制备方法的失效机制，并将严重的相分离归因于其原因。因此，我们引入L-正缬氨酸来构建具有低形成焓的COO配位中间相。新的中间相改变了结晶途径，从而抑制了相分离。据此，获得了具有理想性能的高质量大面积准二维薄膜。基于此，我们进一步合理调整了薄膜的复合动力学。我们报道了一系列有源区为9.0平方厘米的高效绿色准二维PeLEDs。在= 3时实现了16.4%的峰值外量子效率（EQE），代表了迄今为止最有效的大面积PeLEDs。同时，在= 10的薄膜中实现了亮度高达9.1×10 cd m的高亮度器件。