吉林大学发表最新Nature论文：刷新世界纪录

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].