Proceedings of International Conference on Perovskite and Organic Photovoltaics and Optoelectronics (IPEROP19)
Publication date: 23rd October 2018
Perovskite solar cells (PSCs) have reached over 20% efficiency. However, there is still room for improvement of the reproducibility of the solar cell performance in the PSCs. Also, PSCs still have unknown properties such as a hysteresis of I-V curve, effects of the porous layers in the electron transporting layer, and effects of aging. Characterization of the PSCs is essential to understand the electronic properties of the materials and their interfaces in PSCs. Impedance spectroscopy is powerful method for measurement of the resistance components and the capacitance in the electronics devices and is often used for characterizations of the PSCs. However, impedance spectra in PSCs are mostly used for supporting the presumption in the results without verification of the spectra assignment. On the other hand, there are reports to verify the impedance spectra of PSCs with the complexity equivalent circuits. Interpretation of the impedance spectra for PSCs with simple equivalent circuits is significant for the accurate characterization of PSC as a general method.
In this research, we prepared the model PSCs including different thickness of hole transporting layer (HTL) and measured the impedance spectra of the model PSCs to understand the correspondence between the HTL in PSCs and spectra.
This work was supported by the New Energy and Industorial Technology Development Organization (NEDO) of Japan.
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