许辉：“点亮”绝缘材料

Core Viewpoint - A groundbreaking research led by Professor Xu Hui from Heilongjiang University has successfully achieved efficient electroluminescence in insulating rare earth nanocrystals, transforming the concept of "insulating luminescence" from impossible to reality [1]. Group 1: Research Background - Professor Xu Hui began his academic journey in 2003, focusing on organic electroluminescent (OLED) materials, particularly rare earth complexes, which are seen as core materials for next-generation display technology due to their narrow emission bands and high color purity [2]. - Despite the potential, rare earth complexes faced two major challenges: poor stability and low electroluminescence efficiency. Xu addressed stability issues by utilizing phosphine oxide ligands, significantly enhancing the material's stability for industrial production [2]. Group 2: Research Development - After resolving stability issues, the electroluminescence efficiency remained below industrial standards. Xu shifted his focus to understanding the physical mechanisms of the luminescence process, leading to the development of red-emitting rare earth complexes that met international standards [3]. - In 2006, Xu joined Heilongjiang University, where he built a research lab from scratch, demonstrating resilience and innovation despite limited resources. His team achieved significant breakthroughs, including publications in prestigious journals [5]. Group 3: Innovative Approach - Xu's team explored rare earth nanocrystals, which possess superior luminescent properties but are inherently insulating, preventing charge entry. They proposed a novel concept of using ligands to create a "photoelectric bridge" to facilitate energy transfer [6]. - Over 14 years, the team tested over 200 materials to find suitable ligands, ultimately designing the optimal molecule CzPPOA, which efficiently transfers electrical energy to the insulating rare earth nanocrystals with a remarkable efficiency of 96.7% [6]. Group 4: Collaborative Efforts - The research involved deep collaboration with teams from the National Academy of Singapore and Tsinghua University, highlighting the importance of teamwork and strategic guidance in achieving scientific breakthroughs [7]. Group 5: Education and Mentorship - Xu emphasizes the importance of cultivating students' problem-solving abilities rather than merely imparting knowledge. His mentorship has led to the rapid development of students, some of whom have become key figures in the research team [8]. - Xu's approach fosters collaboration among students, encouraging them to engage with the broader scientific community, which is essential for achieving significant research outcomes [9].