近日，日本京都大学Takuji Hatakeyama团队揭示了有机自发辐射接近单色极限。2026年6月11日出版的《科学》杂志发表了这项成果。

自发光发射本质上与光谱展宽机制有关，导致发射光的带宽有限。将谱线宽度收窄至接近单色极限，长期以来一直是光子学领域的核心追求，因为它决定了非受激光源的最终色纯度。有机发光材料易于实现波长调谐，但通常表现出较宽的发射带（>40 纳米）。

多共振发射体的出现为克服这一局限提供了有前景的途径，但目前报道的大多数体系仍处 20-30纳米之间。研究组提出了一种通过分子重复来放大多重共振效应的分子设计策略，所获得的荧光在甲苯中的线宽为6.9纳米，在 3-甲基戊烷中为5.5纳米，在掺杂聚合物薄膜中为9.1纳米，使该分子骨架跻身于已报道的最窄带有机发光体之列。

附：英文原文

Title: Organic spontaneous emission approaching the monochromatic limit

Author: Masashi Mamada, Kota Kataoka, Junki Ochi, Taehwan Lee, Ryuji Matsumoto, Mayu Yoshioka, Daisuke Fukushima, Takuji Hatakeyama

Issue&Volume: 2026-06-11

Abstract: Spontaneous emission is inherently associated with spectral broadening mechanisms, resulting in finite bandwidth in the emitted light. Narrowing this linewidth toward the monochromatic limit has long been a central pursuit in photonics, as it determines the ultimate color purity of nonstimulated light sources. Organic luminescent materials offer facile wavelength tunability but typically exhibit broad emission bands (>40 nanometers). The emergence of multiple-resonance emitters has provided a promising route to overcome this limitation, yet most reported systems remain within 20 to 30 nanometers. We present a molecular design strategy that amplifies the multiple-resonance effect through molecular repetition, yielding fluorescence with linewidths of 6.9 nanometers in toluene, 5.5 nanometers in 3-methylpentane, and 9.1 nanometers in a doped polymer film, placing this molecular framework among the narrowest-band organic luminophores reported.

DOI: aee0001

Source: https://www.science.org/doi/10.1126/science.aee0001