CH3NH3PbCl3 单晶：逆温结晶与可见盲紫外光电探测器

CH3NH3PbCl3 Single Crystals: Inverse Temperature Crystallization and Visible-Blind UV-Photodetector.

作者信息

Maculan Giacomo, Sheikh Arif D, Abdelhady Ahmed L, Saidaminov Makhsud I, Haque Md Azimul, Murali Banavoth, Alarousu Erkki, Mohammed Omar F, Wu Tom, Bakr Osman M

机构信息

Division of Physical Sciences and Engineering, Solar and Photovoltaics Engineering Research Center, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Kingdom of Saudi Arabia.

Materials Science and Engineering, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Kingdom of Saudi Arabia.

出版信息

J Phys Chem Lett. 2015 Oct 1;6(19):3781-6. doi: 10.1021/acs.jpclett.5b01666. Epub 2015 Sep 17.

DOI:10.1021/acs.jpclett.5b01666

PMID:26722870

Abstract

Single crystals of hybrid perovskites have shown remarkably improved physical properties compared to their polycrystalline film counterparts, underscoring their importance in the further development of advanced semiconductor devices. Here we present a new method of growing sizable CH3NH3PbCl3 single crystals based on the retrograde solubility behavior of hybrid perovskites. We show, for the first time, the energy band structure, charge recombination, and transport properties of CH3NH3PbCl3 single crystals. These crystals exhibit trap-state density, charge carrier concentration, mobility, and diffusion length comparable with the best quality crystals of methylammonium lead iodide or bromide perovskites reported so far. The high quality of the crystal along with its suitable optical band gap enabled us to build an efficient visible-blind UV-photodetector, demonstrating its potential in optoelectronic applications.

摘要

与多晶薄膜相比，杂化钙钛矿单晶的物理性能有了显著改善，这突出了它们在先进半导体器件进一步发展中的重要性。在此，我们基于杂化钙钛矿的逆向溶解度行为，提出了一种生长尺寸可观的CH3NH3PbCl3单晶的新方法。我们首次展示了CH3NH3PbCl3单晶的能带结构、电荷复合和输运特性。这些晶体的陷阱态密度、电荷载流子浓度、迁移率和扩散长度与目前报道的甲基碘化铅或溴化铅钙钛矿的最佳质量晶体相当。晶体的高质量及其合适的光学带隙使我们能够制造出高效的日盲型紫外光探测器，证明了其在光电子应用中的潜力。