Erol Erdinç, Kıbrıslı Orhan, Çelikbilek Ersundu Miray, Ersundu Ali Erçin
Faculty of Chemical and Metallurgical Engineering, Department of Metallurgical and Materials Engineering, Glass Research and Development Laboratory, Yildiz Technical University, Istanbul, 34220, Turkey.
Department of Metallurgical and Materials Engineering, Manisa Celal Bayar University, Muradiye, Manisa, Turkey.
Phys Chem Chem Phys. 2022 Jan 19;24(3):1486-1495. doi: 10.1039/d1cp05016h.
Cesium lead bromide (CsPbBr) quantum dots (QDs) have shown great potential in the field of luminescent materials owing to their superior optical and electrical properties. However, instability and lack of multicolor emissions resulting from the intrinsic nature of CsPbBr QDs are still the major challenge for their commercialization. Herein, Eu and Tm co-doped CsPbBr QD glass nanocomposites (GNCs) are successfully synthesized traditional melt-quenching followed by a heat-treatment route to obtain tunable emission in a durable host material. Tm ions are doped to blue-shift the main emission peak of CsPbBr QDs, while Eu ions are incorporated to compensate for the red deficiency. Accordingly, a tunable color emission spanning the entire visible spectrum is achieved from GNCs with a fixed composition. The incorporation of Eu and Tm ions promotes the crystallization of CsPbBr QDs in the glass host resulting in ∼100% photoluminescence quantum yield (PLQY) using a dilution method. The selected glass host has also been proven to effectively protect CsPbBr QDs against chemical, thermal and photo degradation. Interestingly, the selected Eu/Tm co-doped CsPbBr QD GNC shows warm-white light with a low color temperature of 3692 K without utilizing any commercial phosphors. This indicates that the produced GNCs have the potential to be used as light convertor materials in multi-color LED or warm white LED applications due to their robust stability and extremely pure and tunable emission colors.
溴化铯铅（CsPbBr）量子点（QDs）因其优异的光学和电学性能在发光材料领域展现出巨大潜力。然而，CsPbBr量子点的固有性质导致的不稳定性和缺乏多色发射仍然是其商业化的主要挑战。在此，通过传统的熔体淬火然后进行热处理路线，成功合成了铕（Eu）和铥（Tm）共掺杂的CsPbBr量子点玻璃纳米复合材料（GNCs），以在耐用的主体材料中获得可调谐发射。掺入Tm离子使CsPbBr量子点的主要发射峰蓝移，同时掺入Eu离子以弥补红色不足。因此，具有固定组成的GNCs实现了跨越整个可见光谱的可调谐颜色发射。Eu和Tm离子的掺入促进了CsPbBr量子点在玻璃主体中的结晶，使用稀释法导致光致发光量子产率（PLQY）达到约100%。所选的玻璃主体也已被证明能有效保护CsPbBr量子点免受化学、热和光降解。有趣的是，所选的Eu/Tm共掺杂CsPbBr量子点GNC在不使用任何商用磷光体的情况下显示出3692 K的低色温暖白光。这表明所制备的GNCs由于其强大的稳定性以及极其纯净和可调谐的发射颜色，有潜力用作多色LED或暖白光LED应用中的光转换材料。
