浙江工业大学李贵杰团队研究了由铂（II）发射器实现的高性能深蓝色磷光有机发光二极管。2025年7月9日出版的《自然—光子学》杂志发表了这一最新研究成果。
有机发光二极管（OLED）代表了一种革命性的技术，已在全彩色显示器中成功商业化。然而，这项技术仍然受到蓝色OLED低效率的严重限制。开发高性能蓝色OLED是一项重大挑战，发射器对于克服这一问题至关重要。研究组设计了具有局部激发主导特征和刚性三维几何形状的磷光铂（II）配合物，以抑制分子间相互作用，从而实现稳健的深蓝色器件。
底发射有机发光二极管（OLED）的发射波长为464 nm，半峰全宽为17.1 nm。在亮度分别为1,000 cd m-2、5,000 cd m-2和10,000 cd m-2时，其外量子效率高达30.8%、26.4%和23.2%。顶发射器件则实现了更高的色纯度（半峰全宽为13.1 nm，CIEy = 0.062）、较低的工作电压（在1,000 cd m-2时为3.9 V）以及高达468 cd A-1 CIEy-1的最大蓝光指数。这些OLED在初始亮度为1,000 cd m-2时还具有670小时的长半衰期。该研究为开发高性能深蓝光磷光有机发光二极管提供了一种重要方案。
附：英文原文
Title: High-performance deep-blue phosphorescent organic light-emitting diodes enabled by a platinum(ii) emitter
Author: Li, Guijie, Chu, Qingshan, Yao, Huanhuan, Wu, Kongwu, She, Yuan-Bin
Issue&Volume: 2025-07-09
Abstract: Organic light-emitting diodes (OLEDs) represent a revolutionary technology that has been successfully commercialized in full-colour displays. However, this technology is still severely limited by the low efficiency of blue OLEDs. Developing high-performance blue OLEDs is a major challenge, and emitters are critical for overcoming this issue. Here we design phosphorescent platinum(II) complexes with a locally excited-dominated character and a rigid three-dimensional geometry to suppress intermolecular interactions, enabling robust deep-blue devices. Bottom-emitting OLEDs emit at 464nm with a full-width at half-maximum of 17.1nm and high external quantum efficiencies of 30.8%, 26.4% and 23.2% at 1,000cdm2, 5,000cdm2 and 10,000cdm2, respectively. Top-emitting devices achieve enhanced colour purity (full-width at half-maximum of 13.1nm, CIEy=0.062), a low running voltage (3.9V at 1,000cdm2) and a maximum blue index of 468cdA1 CIEy1. These OLEDs also exhibit a long half-lifetime of 670h at an initial luminance of 1,000cdm2. This study provides an important strategy to develop high-performance deep-blue phosphorescent OLEDs.
DOI: 10.1038/s41566-025-01706-0
Source: https://www.nature.com/articles/s41566-025-01706-0