Cu2ZnSnS4 nanoparticles as HTM for Perovskite Solar Cells
To increase the performance stability of perovskite solar cells (PSCs) the commonly used organic hole transporting materials (HTMs) can be substituted by inorganic ones. For this purpose, we employ Cu2ZnSnS4 nanoparticles (CZTS NPs) as HTM. The nanoparticle structure allows easy ink-based solution deposition methods. In preliminary work, we have obtained a PSC with CZTS as HTM more stable than the reference PSC with the organic HTM. In addition, after 50 days the efficiency of the device with the inorganic HTM is even increased by 80%, while the efficiency of that with organic HTM decreased by 22%. Thus, the purpose of this proposal is to deepen the study of the CZTS NPs layer, by itself and in a device, to understand the causes of this unusual efficiency enhancement, which could be related to the improved perovskite chemical stability.
Status: Ongoing
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