Photovoltaic switching mechanism in lateral structure hybrid Perovskite solar cells

Published

August 5, 2015

Author(s)

Yongbo Yuan, Jungseok Chae, Yuchuan Shao, Qi Wang, Zhengguo Xiao, Andrea Centrone, Jinsong Huang

Abstract

Organometal trihalide perovskite solar cells with lateral device architecture recently attracted interest because of their switchable photovoltaic effect, which potentially could be leveraged to realize transparent-electrode-free solar cells. However, the switching mechanism in these devices remains unknown. Here, we prove that the activation of the switchable photovoltaic effect in those devices is triggered by long range electromigration of methylammonium ions (MA+), as observed directly with the Photothermal Induced Resonance technique. The electromigration of MA+ leads to the formation of a lateral p-i-n structure. Macroscale experiments show that electromigration of MA+ ions occurs for applied fields as small as 0.3 V/µm with an activation energy of 360 ± 30 meV.

Citation

Advanced Energy Materials

Volume

5

Issue

15

Pub Type

Journals

Download Paper

https://doi.org/10.1002/aenm.201500615

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Keywords

Perovskite Solar Cells, switchable photovoltaic, ionic electromigration, Photothermal Induced Resonance, Kelvin Probe Force Microscopy, activation energy

Citation

Yuan, Y. , Chae, J. , Shao, Y. , Wang, Q. , Xiao, Z. , Centrone, A. and Huang, J. (2015), Photovoltaic switching mechanism in lateral structure hybrid Perovskite solar cells, Advanced Energy Materials, [online], https://doi.org/10.1002/aenm.201500615, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=918218 (Accessed April 19, 2024)