Intrinsic slow charge response in the perovskite solar cells: Electron and ion transport
- 19 October 2015
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 107 (16), 163901
- https://doi.org/10.1063/1.4934633
Abstract
The intrinsic charge response and hysteresis characteristic in the perovskite solar cell has been investigated by an electrically modulated transient photocurrent technology. An ultraslow charge response process in the timescale of seconds is observed, which can be well explained by the ion migration in the perovskite CH3NH3PbI3 film driven by multiple electric fields derived from the heterojunction depletion charge, the external modulation, and the accumulated ion charge. Furthermore, theoretical calculation of charge transport reveals that the hysteresis behavior is also significantly influenced by the interfacial charge extraction velocity and the carrier transport properties inside the cell.This publication has 44 references indexed in Scilit:
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