Indium tin oxide-free perovskite solar cells with high flexibility and mechanical stability based on the ultrathin Au electrodes

Zhao-Jun Fan; Fang-Shun Yi; Shuang Guo; Yan-Gang Bi

doi:10.1117/1.OE.58.1.017103

14 January 2019 Indium tin oxide-free perovskite solar cells with high flexibility and mechanical stability based on the ultrathin Au electrodes

Zhao-Jun Fan, Fang-Shun Yi, Shuang Guo, Yan-Gang Bi

Author Affiliations +

Optical Engineering, Vol. 58, Issue 1, 017103 (January 2019). https://doi.org/10.1117/1.OE.58.1.017103

Abstract

Flexible perovskite solar cells (pero-SCs) have drawn much attention due to their high efficiency and low cost. Indium tin oxide (ITO) and fluorine-doped SnO₂ as the most commonly used transparent electrodes in pero-SCs, unfortunately, exhibit poor mechanical stability in flexible devices. We demonstrate flexible pero-SCs based on an ultrathin Au electrode with perfect performance of transmittance, conductivity, and mechanical stability. The ultrathin Au electrode with the thickness of 7 nm is prepared on the SU-8/Ca modified substrate, and the Volmer–Weber growth mode of deposited metal film has been suppressed successfully by the chemical and physical bonding from the SU-8/Ca hybrid modification layer. The ITO-free flexible pero-SCs based on ultrathin Au electrodes achieve the power conversion efficiency of 11.44%, and nearly 82% of the initial efficiency remains after approximately 2400 bending cycles, demonstrating the high flexibility and mechanical stability of the ultrathin Au electrode as well as the ITO-free pero-SCs.

Citation Download Citation

Zhao-Jun Fan, Fang-Shun Yi, Shuang Guo, and Yan-Gang Bi "Indium tin oxide-free perovskite solar cells with high flexibility and mechanical stability based on the ultrathin Au electrodes," Optical Engineering 58(1), 017103 (14 January 2019). https://doi.org/10.1117/1.OE.58.1.017103

Received: 4 November 2018; Accepted: 26 December 2018; Published: 14 January 2019

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