Laverdant Julien, Marcillac Willy Daney de, Barthou Carlos, Chinh Vu Duc, Schwob Catherine, Coolen Laurent, Benalloul Paul, Nga Pham Thu, Maître Agnès
Université Pierre et Marie Curie-Paris 6, UMR 7588, INSP, 4 place Jussieu, PARIS cedex 05, France.
CNRS, UMR7588, INSP, Paris cedex 05, France.
Materials (Basel). 2011 Jun 30;4(7):1182-1193. doi: 10.3390/ma4071182.
Many studies have considered the luminescence of colloidal II-VI nanocrystals, both in solution at a collective scale and at an individual scale by confocal microscopy. The quantum yield is an important figure of merit for the optical quality of a fluorophore. We detail here a simple method to determine the quantum yield of nanocrystals in solution as a function of the absorption. For this purpose, we choose rhodamine 101 as a reference dye to measure the nanocrystal fluorescence quantum yield. The influence of the concentration on quantum yield is therefore studied for both the reference and the solutions of nanocrystals and is found to be critical for the acuity of the method. Different types of nanocrystals are studied to illustrate different quantum yield evolutions with the concentration.
许多研究都探讨了胶体II-VI族纳米晶体的发光现象，这些研究既涉及在集体尺度下溶液中的发光，也包括通过共聚焦显微镜在单个尺度下的发光。量子产率是衡量荧光团光学质量的一个重要品质因数。我们在此详细介绍一种简单方法，用于确定溶液中纳米晶体的量子产率与吸收的函数关系。为此，我们选择罗丹明101作为参考染料来测量纳米晶体的荧光量子产率。因此，我们研究了浓度对参考染料和纳米晶体溶液量子产率的影响，发现这对该方法的准确性至关重要。我们研究了不同类型的纳米晶体，以说明量子产率随浓度的不同变化情况。
