Abstract
In this paper, structural and photovoltaic properties of perovskite CH3NH3PbI3-xClx solar cells added with ammonium iodide (NH4I) are reported. The CH3NH3PbI3-xClx photovoltaic cells were fabricated by a hot air blow-assisted spin-coating method. By addition of NH4I, photovoltaic performance of the CH3NH3PbI3-xClx cell fabricated by the hot air blow-assisted spin-coating method was improved. The microstructure analysis of the resulting cells showed that the NH4I− added CH3NH3PbI3-xClx film was highly oriented along the (100) plane. Moreover, morphological changes of the NH4I− added CH3NH3PbI3-xClx film due to NH4I addition were also observed. The improvements of the photovoltaic performance, the crystal orientation, and the morphological changes of the CH3NH3PbI3-xClx are attributed to NH4I addition.
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