Multi-functional application potential of Ruddlesden–Popper perovskite-based heterostructure PtSe2/Cs2PbI4 with tunable electronic properties
| Autor: | Cheng-Sheng Liao, Biao Liu, Jun-Liang Yang, Meng-Qiu Cai |
|---|---|
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Journal of Physics: Condensed Matter. 35:115002 |
| ISSN: | 1361-648X 0953-8984 |
| DOI: | 10.1088/1361-648x/acb0a6 |
| Popis: | Heterogeneous stacking based on two-dimensional Ruddlesden–Popper (RP) perovskite is a desired strategy for the reasonable combination of stability and efficiency. Constructing heterostructures with tunable optoelectronic properties further provide opportunities to design multi-functional devices. Herein, we present a first-principle research to investigate the geometric and electronic structures of RP perovskite heterostructure PtSe2/Cs2PbI4 and its tunable electronic properties induced by thickness modulation and external strains. The results indicate that the heterostructure based on Cs2PbI4 monolayer and PtSe2 monolayer has a type-II band alignment, which is suitable for the photovoltaic applications. With the layer number of PtSe2 in heterostructure increases from monolayer to bilayer, the band alignment of PtSe2/Cs2PbI4 heterostructure can switch from type-II to type-I, which is beneficial for the luminescence device applications. However, when the thickness of PtSe2 in heterostructure further increases to trilayer, the heterostructure exhibits metallic characteristic with a p-type Schottky barrier. In addition, we find the strain engineering is an effective knob in tuning the electronic properties of PtSe2/Cs2PbI4 heterostructures with different thickness. These findings reveal the potential of PtSe2/Cs2PbI4 heterostructure as a tunable hybrid material with substantial prospect in multi-functional applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|