A Narrow Bandgap of 2D Ruddlesden-Popper Bilayer Perovskite with Giant Entropy Change and Photoluminescence.
Jia-Chang ZhuangWen-Juan WeiNing SongYun-Zhi TangYu-Hui TanDing-Chong HanYu-Kong LiPublished in: Chemistry (Weinheim an der Bergstrasse, Germany) (2021)
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 382 K accompanied by giant entropy change of 40 J mol-1 K-1 . Further optical investigations indicate that 1 reveals a narrow direct bandgap (2.024 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 0.1607 ms. It is believed that this work will pave an avenue to further design multifunctional semiconductors that combines energy storage and photoelectric materials.
Keyphrases
- quantum dots
- heavy metals
- room temperature
- solar cells
- drug delivery
- water soluble
- aqueous solution
- cancer therapy
- high efficiency
- metal organic framework
- mass spectrometry
- multiple sclerosis
- energy transfer
- risk assessment
- rare case
- living cells
- high speed
- human health
- ionic liquid
- perovskite solar cells
- light emitting
- single molecule