Regulating the Emission Spectrum of CsPbBr₃ from Green to Blue via Controlling the Temperature and Velocity of Microchannel Reactor.
Regulating the Emission Spectrum of CsPbBr₃ from Green to Blue via Controlling the Temperature and Velocity of Microchannel Reactor.
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通过控制微通道反应器温度和速度调节CsPbBr3发射光谱从绿光到蓝光
DOI：
10.3390/ma11030371
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发表时间：
2018-03-02
期刊：
影响因子：
--
通讯作者：
Yu B
中科院分区：
文献类型：
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作者：
Tang Y;Lu H;Rao L;Li Z;Ding X;Yan C;Yu B
精确获得卤化铅钙钛矿量子点(QD)的可调谐光谱的能力对于照明和显示等应用是非常重要的。在这里，我们报道了一种用于合成光谱可调的CsPbBr3量子点的微通道反应器方法。通过调节微通道反应器的温度和速度，获得了从520 nm到430 nm的CsPbBr3量子点的发射峰，这比在不改变卤化物组分的情况下在传统烧瓶中获得的量子点的发射峰更宽。研究了CsPbBr3量子点的光致发光光谱漂移的机理，结果表明，微通道中优良的传质和传热性能实现的过饱和控制是实现宽光谱范围的关键，只需改变温度控制器的设置即可。广泛的CsPbBr3量子点可以应用于发光二极管(LED)、光电传感器、激光器等。
The ability to precisely obtain tunable spectrum of lead halide perovskite quantum dots (QDs) is very important for applications, such as in lighting and display. Herein, we report a microchannel reactor method for synthesis of CsPbBr3 QDs with tunable spectrum. By adjusting the temperature and velocity of the microchannel reactor, the emission peaks of CsPbBr3 QDs ranging from 520 nm to 430 nm were obtained, which is wider than that of QDs obtained in a traditional flask without changing halide component. The mechanism of photoluminescence (PL) spectral shift of CsPbBr3 QDs was investigated, the result shows that the supersaturation control enabled by the superior mass and heat transfer performance in the microchannel is the key to achieve the wide range of PL spectrum, with only a change in the setting of the temperature controller required. The wide spectrum of CsPbBr3 QDs can be applied to light-emitting diodes (LEDs), photoelectric sensors, lasers, etc.