Stable and conductive lead halide perovskites facilitated by X-type ligands

Nanoscale
Longfei RuanZhengtao Deng

Abstract

Lead halide perovskites exhibit outstanding optoelectronic and optical properties. However, some applications of perovskites are hindered by their instability in polar environments; thus, how to balance stability with conductivity is a great challenge. Here, we report a new approach of using X-type ligands to address this issue. Surface treatments containing multi-step ligand exchanges and ion filling were necessary to obtain X-type ligand-protected perovskites. Performances of this material show that: (1) the crystal structure of perovskites is stable in ethanol; (2) surface defects can be fixed by a photoactivation process and photoluminescence intensity can be enhanced to 136%; and (3) electronic devices fabricated from such materials show stabilility even after washing with ethanol. X-type ligand-protected perovskites with high stability and good conductivity are promising new materials for wide applications in electronic and optoelectronics devices.

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Citations

Apr 20, 2018·Chemical Communications : Chem Comm·Shanshan ChenWeiwei Guo
Jun 18, 2021·ACS Applied Materials & Interfaces·Hong-Rae KimJae-Chul Pyun
Jul 12, 2018·The Journal of Physical Chemistry Letters·Hua WangWilliam W Yu

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