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ShanghaiTech Scientists Successfully Fabricated Two-Dimensional Perovskite Film and Colorful Perovskite Solar Cells
Author:            Date:2016-06-28            Browse:1228

Recently, the researchers from assistant Prof. Gang Chen’s group at school of physical science and technology of ShanghaiTech University have fabricated the two-dimensional (2D) photonic films based on organic-inorganic hybrid perovskite materials and applied them in perovskite solar cells (SCs). Their results were published in the ACS journal “Nano Letters” entitled “Two-Dimensional Organic–Inorganic Hybrid Perovskite Photonic Films”.

The organic–inorganic hybrid perovskite material has drawn much attention as a new and promising candidate for the field of optoelectronics. In prospect, future advancements may derive from reaping novel electrical and optical properties beyond pristine perovskites through microscopic structure design and engineering. The inverse-opal (IO) nano-structure thus has the capability of showing novel optical and electrical properties. In this study, the 2D IOP photonic films are prepared using a template assisted spin-coating method. Synchrotron-based grazing incidence X-ray diffraction (GI-XRD) measurements are carried out to investigate the crystal structure of the 2D IOP films. Their morphologies and optical properties were characterized by scanning electron microscope (SEM), atomic force microscope (AFM), and UV–vis, photoluminescence (PL), and reflection spectroscopies. Compared to the nonstructured perovskite films, they exhibit a series of emergent features, including bandgap shift and vivid colors visible to the naked eye, due to their unique structure and spatial confinement on crystal grains. The typical 2D IOP films are employed to assemble SCs that also exhibit vivid colors with promising PCEs. The present findings should shed light on the enchanting multifunctional perovskite-based SCs and other optoelectronic devices with excellent perspectives.

This work was financially supported by the National Natural Science Foundation of China and the Science and Technology Commission of Shanghai Municipality.

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