Stable and conductive lead halide perovskites facilitated by X-type ligands.
Nanoscale
; 9(21): 7252-7259, 2017 Jun 01.
Article
em En
| MEDLINE
| ID: mdl-28516993
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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Bases de dados:
MEDLINE
Idioma:
En
Revista:
Nanoscale
Ano de publicação:
2017
Tipo de documento:
Article