"叠层不是简单的'1+1=2'，其核心难点在于连接层要同时实现高效的载流子注入与光子透射，并在溶液 逐层旋涂的过程中，保证每一层钙钛矿薄膜的质量。"王建浦介绍，十余年来，团队不断优化连接层和 钙钛矿发光层的微纳结构，创新提出"层间光子循环"，让一层钙钛矿层产生的光子，可以被另一个钙钛 矿层重新吸收并再次发射，从而突破传统光提取效率的限制。 实验结果显示，团队制备的叠层钙钛矿LED器件外量子效率达45.5%。《自然》审稿人评价，此次提出 的"层间光子循环"，为今后提升钙钛矿LED效率开辟了一个重要方向。 黄维表示，尽管团队制备的叠层钙钛矿LED尚处于实验室阶段，但器件效率已达商业化水平。团队将尝 试放大实验室成果，稳步推进钙钛矿LED产业化。（完） 新华社南京11月12日电（记者陈席元）记者11月12日从南京工业大学获悉，该校柔性电子全国重点实验 室主任、中国科学院院士黄维与王建浦、王娜娜教授团队创新提出"层间光子循环"，将叠层钙钛矿发光 二极管（LED）的外量子效率提升至45.5%。国际学术期刊《自然》12日在线发表相关论文。 王娜娜介绍，钙钛矿光伏电池将光能转化为电能，钙钛矿LED则相反，将电能转化为光能。 ...

Core Insights - Scientists at the University of Cambridge's Cavendish Laboratory have observed a quantum effect in organic materials, previously thought to exist only in inorganic metal oxides, which allows for highly efficient conversion of light energy into electrical energy [1][2] - The research focuses on a spin-free radical organic semiconductor called P3TTM, which contains unpaired "single" electrons that exhibit unique magnetic and electronic behaviors [1] - The study reveals that when these molecules are densely packed, the "single" electrons display "Mott-Hubbard insulator" behavior, leading to alternating arrangements of electrons [1] Group 1 - The "single" electrons absorb light energy and transition to neighboring molecules, creating a chain reaction that separates positive and negative charges, resulting in a continuous electric current [2] - A solar cell was constructed using P3TTM films, achieving nearly perfect charge collection efficiency, with almost every incident photon converted into usable current [2] - Unlike traditional organic solar cells that require two materials for electron transfer, the new material can complete the entire conversion process using a single substance, potentially leading to lower-cost and lightweight solar cells [2]