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Efficient and Stable Perovskite Solar Cell with High Open Circuit Voltage by Dimensional Interface Modification.

07:00 EST 4th February 2019 | BioPortfolio

Summary of "Efficient and Stable Perovskite Solar Cell with High Open Circuit Voltage by Dimensional Interface Modification."

High efficiency organic-inorganic hybrid perovskite solar cells have experienced rapid development and attracted significant attention in recent years. However, instability to ambient environment such as moisture is a facile challenge for application of perovskite solar cells. Herein, 1,8-octanediammonium iodide (ODAI) is employed to construct a 2D modified interface by in situ combined with residual PbI2 on the Formamidinium lead iodide (FAPbI3) perovskite surface. The ODA2+ is seem to lie horizontally on the surface of 3D perovskite due to its substitution for two FA+, which could protect the bulk perovskite more effectively. The unencapsulated perovskite solar cells showed notably improved stability, which remained 92% of its initial efficiency after storage in ambient environment for 120 days. In addition, a higher open circuit voltage of 1.13 V compared to that of control device (1.04 V) was obtained due to the interface energy level modification and defect passivation. A champion power conversion efficiency of 21.18% was therefore obtained with a stabilized power output of 20.64% at the maximum power point for planar perovskite solar cells.

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Name: ACS applied materials & interfaces
ISSN: 1944-8252
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