量子产率方法中的一个关键人工制品
On a critical artifact in the quantum yield methodology
摘要：
对于新型发光材料（如荧光蛋白、染料和半导体量子点（QD））的开发和优化，发射效率的可靠且稳健的分析至关重要。发射效率通常通过光致发光量子产率（QY）来量化，光致发光量子产率（QY）由发射光子与吸收光子的比率来定义。我们发现，这种方法存在一个缺陷，导致QY值被低估，表现为“寄生吸收”。该效应尚未在文献中描述和/或校正，并且在常见实验条件下已经存在，因此，它与许多已发表的研究高度相关。为了纠正这种影响，我们提出了修改的方法和纠正程序。
英文摘要：
For the development and optimization of novel light emitting materials, such as fluorescent proteins, dyes and semiconductor quantum dots (QDs), a reliable and robust analysis of the emission efficiency is crucial. The emission efficiency is typically quantified by the photoluminescence quantum yield (QY), defined by the ratio of emitted to absorbed photons. We show that this methodology suffers from a flaw that leads to underestimated QY values, presenting as a 'parasitic absorption'. This effect has not been described and/or corrected for in literature and is present already under common experimental conditions, therefore, it is highly relevant for a number of published studies. To correct for this effect, we propose a modification to the methodology and a correction procedure.
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