Fluorescence resonance energy transfer (FRET) has been proven to be an efficient sensitization method to construct broad-spectrum responsive organic–inorganic hybrid systems for efficient conversion and utilization of solar energy. To investigate the effect of the inorganic material bandgap on FRET dynamics and mechanism, we have constructed a series of cadmium telluride (CdTe) quantum dot (QD)-diketopyrrolopyrrole (DPP) hybrids via QD bandgap engineering. Steady-state and transient spectroscopy revealed that a fast and efficient FRET process was proceeded in these systems. Via controlling the spectral overlap degree between them by adjusting the CdTe QD size, the FRET dynamics and direction could be controlled effectively. A large spectral overlap integral between the emission of the donor and the absorption of the acceptor is crucial for realizing efficient and rapid FRET. These insights gained from this study contribute to the advancement of QD–dye nanocomposite materials, facilitating their application in a wide range of fields.

中文翻译：

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通过带隙工程调整碲化镉-二酮吡咯吡咯杂化物中的荧光共振能量转移


荧光共振能量转移 （FRET） 已被证明是一种有效的敏化方法，可用于构建广谱响应有机-无机杂化系统，以实现太阳能的高效转换和利用。为了研究无机材料带隙对FRET动力学和机理的影响，我们通过QD带隙工程构建了一系列碲化镉（CdTe）量子点（QD）-二酮吡咯吡咯（DPP）杂化物。稳态和瞬态光谱表明，在这些系统中进行了快速高效的 FRET 过程。通过调整 CdTe QD 大小来控制它们之间的光谱重叠度，可以有效地控制 FRET 动力学和方向。供体的发射和受体的吸收之间的大光谱重叠积分对于实现高效和快速的 FRET 至关重要。从这项研究中获得的这些见解有助于 QD-染料纳米复合材料的发展，促进其在广泛领域的应用。