Synthesis of highly luminescent CH3NH3PbBr3 perovskite nanocrystals via a forced thin film reactor
Synthesis of highly luminescent CH3NH3PbBr3 perovskite nanocrystals via a forced thin film reactor
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DOI：
10.35848/1347-4065/ab7410
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发表时间：
2020-03
影响因子：
1.5
通讯作者：
M. Takeda;M. Yokoyama;K. Umemoto;Bozhang Lyu;Yoshihito Takahashi;Sasiphapa Rodbuntum;Junya Enomoto-Junya-Enomot
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文献类型：
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作者：
M. Takeda;M. Yokoyama;K. Umemoto;Bozhang Lyu;Yoshihito Takahashi;Sasiphapa Rodbuntum;Junya Enomoto-Junya-Enomot
采用强制薄膜反应器连续制备了具有80%光致发光量子产额的高发光CH 3 NH3 PbBr 3钙钛矿纳米晶（PeNCs）。在该系统中，旋转盘和固定盘形成了一个封闭的微空间，通过连续注入溶剂展示了独特的混合过程。我们发现，独特的混合系统导致具有4 nm-10 nm的胶体PeNCs，其比代表性的T-结系统（15 nm-65 nm）的胶体PeNCs小得多。这表明，一个有限的微空间是有效的正辛胺的PeNCs的表面，从而抑制PeNCs的聚集和晶体生长的覆盖。此外，随着流速的增加，光学性质几乎没有波动。该系统是一个有前途的连续系统，制备胶体PeNCs，并可以提供一个合成协议，适用于发光二极管以及各种其他光电器件。
Highly luminescent CH3NH3PbBr3 perovskite nanocrystals (PeNCs) with a high photoluminescence quantum yield value of 80% are prepared by a forced thin film reactor for continuous production. In this system, the rotating and stationary disks form a confined micro space which demonstrates a unique mixing process through continuous injection of solvents. We found that the unique mixing system leads to colloidal PeNCs with 4 nm–10 nm, which are much smaller than those of a representative T-junction system (15 nm–65 nm). It suggests that a confined micro space is effective for the capping of n-octylamine to the surface of PeNCs, resulting in suppression of the aggregation of the PeNCs and crystal growth. Also, with increasing flow velocity, the optical properties show almost no fluctuation. This system is a promising continuous system to prepare colloidal PeNCs, and can provide a synthetic protocol to be applied for light-emitting diodes as well as various other optoelectronic devices.