Spacer Engineering of Diammonium-Based 2D Perovskites toward Efficient and Stable 2D/3D Heterostructure Perovskite Solar Cells

PaperPaios
Written By Fluxim AG

Tianqi Niu, Yue-Min Xie, Qifan Xue, Sangni Xun, Qin Yao, Fuchao Zhen, Wenbo Yan, Hong Li, Jean-Luc Brédas, Hin-Lap Yip, Yong Cao

Adv. Energy Mater. 2021, 2102973.

doi.org/10.1002/aenm.202102973

Here researchers developed a stable and efficient Perovskite solar cell by combining the efficiency of 3D perovskites and the high stability of 2D perovskites.

They compared PSCs with 2D perovskites based on diammonium ligands with different concentrations and sizes. The 2,2-(ethylenedioxy)bis(ethylammonium) (EDBE) cations guarantee a homogenous growth and good coverage of the 2D perovskite layer on top of the 3D absorber. The 2D layer improves photo-, thermal- and humidity stability while increasing the efficiency by 2.5% compared to the control device. The power conversion efficiency (PCE) of the best solar cell was 22.6%.

The boost in performance is the result of decreased charge recombination and improved charge extraction as confirmed by TPC and TPV measurements carried with Paios.

Fluxim AG
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