A Narrow Bandgap of 2D Ruddlesden-Popper Bilayer Perovskite with Giant Entropy Change and Photoluminescence.
Chemistry
; 27(63): 15716-15721, 2021 Nov 11.
Article
em En
| MEDLINE
| ID: mdl-34498317
ABSTRACT
The multifunctional two-dimensional (2D) organic-inorganic hybrid perovskites have potential applications in many fields, such as, semiconductor, energy storage and fluorescent device etc. Here, a 2D Ruddlesden-Popper (RP) perovskite (IPA)2 (FA)Pb2 I7 (1, IPA+ =C3 H9 NI+ , FA+ =CN2 H5 + ) is determined for its photophysical properties. Strikingly, 1 reveals a solid reversible phase transition with Tc of 382â
K accompanied by giant entropy change of 40â
J mol-1 K-1 . Further optical investigations indicate that 1 reveals a narrow direct bandgap (2.024â
eV) attributed to the slight bending of I-Pb-I edge and inorganic [Pb2 I7 ]n layer and a superior photoluminescence (PL) emission with super long lifetime of 0.1607â
ms. It is believed that this work will pave an avenue to further design multifunctional semiconductors that combines energy storage and photoelectric materials.
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MEDLINE
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En
Ano de publicação:
2021
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Article