Photoinduced Triplet Depletion Allowing Higher-Resolution Afterglow
Photoinduced Triplet Depletion Allowing Higher-Resolution Afterglow
复制标题
DOI：
10.1021/acsmaterialslett.3c00263
复制
发表时间：
2023-05-04
影响因子：
11.4
通讯作者：
Hirata, Shuzo
中科院分区：
文献类型：
--
作者：
Hayashi, Kikuya;Fukumoto, Keiki;Hirata, Shuzo
余辉发射允许在环境条件下独立于自体荧光的成像。虽然需要更高分辨率的余辉以提高无自发荧光发射成像的质量，但是增加激发强度以产生更亮的余辉发射降低了余辉图像的分辨率。因此，提供具有更高分辨率的余辉成像的方法和材料仍有待开发。在这项研究中，我们进行了光致三重态耗尽，并证明了提高分辨率的明亮的余辉发射使用的耗尽。三重态耗尽与通过耗尽和随后的快速单重态形成引起的三重态的光电离的电荷分离有关。通过激发在固体材料中积累的三重态激子在使用具有比材料的吸收波长更长的波长的耗尽光束的照射下被耗尽。通过同时聚焦环形耗尽光束和激发光束，获得了分辨率提高25%的余辉图像。
Afterglow emission allows for imaging that is independent of autofluorescence under ambient conditions. Although higher-resolution afterglow is required for increasing the quality of the autofluorescence-free emission imaging, increasing the excitation intensity to generate brighter afterglow emission decreases the resolution of afterglow images. Therefore, methods and materials that provide afterglow imaging with higher resolution remain to be developed. In this study, we performed photoinduced triplet depletion and demonstrated improved resolution of bright afterglow emission using the depletion. Triplet depletion is related to charge separation via photoionization from a triplet state caused by depletion and subsequent rapid singlet formation. Triplet excitons that accumulated in a solid material by excitation were depleted under irradiation using a depletion beam with a longer wavelength than the absorption wavelength of the material. A higher-resolution afterglow image with an improvement of 25% was obtained by simultaneously focusing a donut-shaped depletion beam and an excitation beam.