Spatially Resolved Photophysical Dynamics in Perovskite Microplates Fabricated Using an Antisolvent Treatment,The Journal of Physical Chemistry C

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Spatially Resolved Photophysical Dynamics in Perovskite Microplates Fabricated Using an Antisolvent Treatment
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2017-11-17 00:00:00 , DOI: 10.1021/acs.jpcc.7b09844
Wei-Long Xu ₁ , Meng-Si Niu ₂ , Xiao-Yu Yang ₂ , Peng-Qing Bi ₂ , Kang-Ning Zhang ₂ , Chao Xiong ₁ , Hong-Chun Yuan ₁ , Trevor A. Smith ₃ , Kenneth P. Ghiggino ₃ , Xiao-Tao Hao _{2,

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Affiliation

Perovskite microplates have important implications in the fields of functional electronics and optoelectronics. We report a facile strategy, antisolvent treatment for the growth of perovskite microplates. The morphology and crystalline quality of the microplates could be controlled by the amount of the chlorobenzene antisolvent used. An appropriate amount of antisolvent facilitates the formation of high-quality perovskite microplates with no residual precursor remaining. Spatially and temporally resolved fluorescence measurements demonstrate the heterogeneity of defect-state density and recombination processes in various perovskite microplate regions. The body center shows higher defect state density when compared with that at the edge or the corner of the microplate. Excessive antisolvent degrades the microplates into smaller particles. The results of this study reveal the factors that influence the crystallization process and photophysical dynamics of perovskite microplates.

中文翻译：

使用抗溶剂处理的钙钛矿微板的空间分辨光物理动力学。

钙钛矿微孔板在功能电子学和光电子学领域具有重要意义。我们报告了一种简便的策略，钙钛矿微孔板生长的抗溶剂处理。微孔板的形态和结晶质量可以通过所用氯苯抗溶剂的量来控制。适量的抗溶剂有助于形成高质量的钙钛矿微孔板，而不会残留任何残留的前体。时空分辨的荧光测量结果证明了钙钛矿微孔板区域中缺陷态密度和重组过程的异质性。与微孔板的边缘或角落相比，体心显示出更高的缺陷状态密度。过量的抗溶剂会使微孔板降解成较小的颗粒。

更新日期：2017-11-20

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