Posted On: 12/10/2015 3:38:01 PM
Post# of 22465
NN10.48 CdSe Tetrapod Interfacial Layer for Improving Electron Extraction in Planar Hetero-Junction Perovskite Solar Cells
We report a cadmium selenide tetrapod (CdSe TP) layer as an electron extraction layer for improving the efficiency of planar hetero-junction perovskite solar cells based on lead iodide (PbI2) and lead chloride (PbCl2) mixed halides. Insertion of the CdSe TP layer between the titanium oxide (TiO2) and perovskite film facilitates electron transfer at the TiO2/perovskite interface, as evidenced by the significant quenching of the steady state photoluminescence of the perovskite film. Absorption in the visible spectral region increased when the CdSe TP layer was introduced. Furthermore, we observed a conductivity enhancement of the perovskite film by the conductive atomic force microscopy (c-AFM) which shows enhanced grain size and current path of CdSe TP induced perovskite film. These effects contribute to an approximately 10% augmentation of the photocurrent. As a result, an efficiency of 13.5% is achieved for perovskite solar cells that incorporate the CdSe TP layer, which is 10% higher than that of the device without the CdSe TP layer.
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We report a cadmium selenide tetrapod (CdSe TP) layer as an electron extraction layer for improving the efficiency of planar hetero-junction perovskite solar cells based on lead iodide (PbI2) and lead chloride (PbCl2) mixed halides. Insertion of the CdSe TP layer between the titanium oxide (TiO2) and perovskite film facilitates electron transfer at the TiO2/perovskite interface, as evidenced by the significant quenching of the steady state photoluminescence of the perovskite film. Absorption in the visible spectral region increased when the CdSe TP layer was introduced. Furthermore, we observed a conductivity enhancement of the perovskite film by the conductive atomic force microscopy (c-AFM) which shows enhanced grain size and current path of CdSe TP induced perovskite film. These effects contribute to an approximately 10% augmentation of the photocurrent. As a result, an efficiency of 13.5% is achieved for perovskite solar cells that incorporate the CdSe TP layer, which is 10% higher than that of the device without the CdSe TP layer.
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