regulating the emission spectrum of cspbbr3 from green to blue via controlling the temperature and velocity of microchannel reactor
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2018
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Abstract
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.
| Reference Key |
tang2018materialsregulating
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| Authors | ;Yong Tang;Hanguang Lu;Longshi Rao;Zongtao Li;Xinrui Ding;Caiman Yan;Binhai Yu |
| Journal | Nature Materials |
| Year | 2018 |
| DOI |
10.3390/ma11030371
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