Core Viewpoint - Metal halide perovskite light-emitting diodes (PeLEDs) are considered a promising next-generation display technology due to their excellent external quantum efficiency (EQE), tunable emission colors, and low-cost processing [2]. Group 1 - Despite their potential, PeLEDs currently lag behind organic light-emitting diodes (OLEDs), which have achieved an EQE of 40%, due to limitations in carrier confinement and non-radiative recombination caused by surface defects [3]. - A recent study published in the journal Nature by researchers from Jilin University and other institutions has made significant advancements in the efficiency of PeLEDs, achieving an EQE of 42.9% (verified at 42.3% by a third party) [3][4]. Group 2 - The research team developed a new strategy for constructing 3D/2D ordered heterojunction perovskite films using a one-step spin-coating method, which effectively confines carriers and shifts the radiative recombination region away from defect-rich surface areas [4]. - The wrinkled morphology of the surface 2D perovskite enhances light extraction efficiency to 45.4%, contributing to the record-breaking EQE of 42.9% [4]. - This breakthrough not only sets a new efficiency record but also simplifies the manufacturing process, requiring only a single spin-coating step to achieve high-performance heterojunctions without complex post-processing [4].

金属卤化物钙钛矿是 发光二极管 （LED） 的有前途的材料。利用纳米晶体/量子点、低维钙钛矿和超薄钙钛矿层在空间上限制电荷载流子，已被用于提高 钙钛矿 发光二极管 （PeLED） 的外量子效率。 然而，由于传统的钙钛矿材料中，电子和空穴 （负责发光的电荷） 难以有效碰撞发光，因此研究人员之前多采用"强空间限域"的方法——例如制作非常小的纳米 颗粒或极薄的材料层，来提高发光效率。但这种方法导致了 LED 亮度有限且使用寿命短，通常只能持续工作数小时，很难用在实际生活中的产品中。 编辑丨王多鱼 排版丨水成文 2025 年 6 月 11 日，中国科学技术大学 肖正国 教授团队在国际顶尖学术期刊 Nature 上发表了题为： Weakly space-confined all-inorganic perovskites for light-emitting diodes 的研究论文。 该研究在提高 钙钛矿发光二极管 （PeLED） 寿命方面取得了重要进展，该研究提出了一种被称作" 弱空间限域 "的新方法，制备出了晶体颗粒更大、更耐高温的 全无机钙钛矿薄膜，成功将 LED 亮度提高到 116 万尼特以上，使用寿命超过 ...