Proceedings of nanoGe September Meeting 2015 (NFM15)
Publication date: 8th June 2015
In this communication, we report on an investigation on efficient P-I-N structured CH3NH3PbI3-based solar cells with carbon electrode using mesoporous TiO2 and NiO layers as electron and hole selective contacts. We will first introduce the fabrication of these devices to achieve the highly efficient devices, then carry out a detailed study on the interfacial carriers transfer and charge recombination processes with photocurrent/photovoltage decay measurement, and electronic impedance spectroscopy measurement. It turns out that the P-I-N structured pervoskite sola cell PSC using p-type NiO layer as hole transport material presents impressive I-V characteristic parameters, and thus a considerably high power conversion efficiency of 14.9% has been achieved. The results reveal that NiO layer reinforces the charge transfer process at the perovskite/carbon interface and weakens the process of charge recombination in the system. Besides, the P-I-N structured pervoskite solar cell shows good stability over 1000 h in the dark. Keywords: perovskite, metal oxide, solar cell, interface charge transfer, impedance References:[1] X. Xu, H. Zhang, K. Cao, J. Cui, J. Lu, X. Zeng, Y. Shen, M. Wang, ChemSusChem, 2014, 7, 3088-3094.[2] Z. Liu, M. Zhang, X. Xu, L. Bu, W. Zhang, W. Li, Z. Zhao, M. Wang, Y. Cheng, H. He, Dalton Trans. 2015, 44, 3967-397..[3] X. Xu, Z. Liu, Z. Zuo, M. Zhang, Z. Zhao, Y. Shen, H. Zhou, Q. Chen, Y. Yang, M. Wang, Nano Lett. 2015, 15, 2042-2048.
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