This study reports the influence of CdSe–ZnS core–shell quantum dots (QDs) for formation of singlet oxygen using zinc‐phthalocyanine (ZnPc) dyes in colloidal solutions. Using a microluminescence surface scan technique it was possible to measure accurately the photon diffusion length, or photon mean free path, inside the medium. Analyses were performed for a range of QD concentrations. Photon diffusion length was assigned to the bimolecular singlet oxygen emission at 707 nm. Related singlet oxygen emission was predicted by observing quenching of the photon diffusion length measured at the specific oxygen emission as a function of QD concentration, being a nontrivial phenomenon related to the QD donors. Diffusion length measured at 707 nm increased with QD concentration; in the absence of QDs, as in pure ZnPc samples, the emission peak at 707 nm was not observed.

中文翻译：

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使用量子点作为供体和锌酞菁作为受体，观察双分子单线态氧发射的空间能量转移。

这项研究报告了在胶体溶液中使用锌酞菁（ZnPc）染料对CdSe-ZnS核壳量子点（QDs）形成单线态氧的影响。使用微发光表面扫描技术，可以精确地测量介质内部的光子扩散长度或光子平均自由程。对一系列QD浓度进行了分析。将光子扩散长度分配给707 nm处的双分子单线态氧发射。通过观察在特定的氧发射下测量的光子扩散长度的猝灭来预测相关的单线态氧发射，该光子扩散长度是QD浓度的函数，这是与QD供体有关的重要现象。量子点浓度在707 nm处测量的扩散长度增加；在没有QD的情况下，例如在纯ZnPc样品中，