Schnier Tobias, Emara Jennifer, Olthof Selina, Meerholz Klaus
Department of Chemistry, University of Cologne.
Department of Chemistry, University of Cologne;
J Vis Exp. 2017 Feb 27(120):55084. doi: 10.3791/55084.
Hybrid organic/inorganic halide perovskites have lately been a topic of great interest in the field of solar cell applications, with the potential to achieve device efficiencies exceeding other thin film device technologies. Yet, large variations in device efficiency and basic physical properties are reported. This is due to unintentional variations during film processing, which have not been sufficiently investigated so far. We therefore conducted an extensive study of the morphology and electronic structure of a large number of CH3NH3PbI3 perovskite where we show how the preparation method as well as the mixing ratio of educts methylammonium iodide and lead(II) iodide impact properties like film formation, crystal structure, density of states, energy levels, and ultimately the solar cell performance.
有机/无机杂化卤化物钙钛矿最近在太阳能电池应用领域引起了极大的关注，具有实现超过其他薄膜器件技术的器件效率的潜力。然而，据报道器件效率和基本物理性质存在很大差异。这是由于薄膜制备过程中的无意变化，到目前为止尚未得到充分研究。因此，我们对大量CH3NH3PbI3钙钛矿的形态和电子结构进行了广泛研究，展示了制备方法以及反应物甲基碘化铵和碘化铅(II)的混合比例如何影响诸如成膜、晶体结构、态密度、能级等性质，并最终影响太阳能电池性能。
