Incorporating separate stacked 2D perovskites with different layered or non-layered substances can introduce novel optical and photonic traits, considerably increasing the heterostructures’ potential performance and purposes.
On this article, the construction and bodily properties of 2D perovskites will likely be first highlighted. The development and characterizations of 2D perovskite-based heterostructures in addition to the essential optical properties of the constructed heterostructures will then be illustrated. Moreover, the potential purposes of 2D perovskite-based heterostructures in photovoltaic units, light-emitting diodes, photodetectors, phototransistors and valleytronic units will likely be demonstrated. Lastly, the present challenges and suggest additional analysis instructions within the area of 2D perovskite-based heterostructures will likely be mentioned. Picture Credit score: Haizhen Wang, Yingying Chen and Dehui Li.
A current examine revealed within the Worldwide Journal of Excessive Manufacturing summarizes the current developments of 2D/quasi-2D perovskite-based heterostructures to expedite the exploration of undiscovered ideas and introduce a brand new spectrum of optoelectronic units.
What are 2D Perovskite-Primarily based Heterostructures?
Heterostructures, that are made by combining two or extra completely different supplies, have been an necessary a part of many several types of optoelectronic units, similar to photovoltaic cells, light-emitting diodes, and photodetectors.
These constructions are distinctive as a result of they show bodily properties that can’t be seen in particular person parts. By combining these supplies, new functionalities may be achieved and explored. In recent times, the development of expertise has allowed scientists to make use of atomically skinny supplies similar to graphene, black phosphorus, and 2D perovskites to assemble heterostructures.
These supplies have particular bodily and optoelectronic properties that may be additional manipulated with strategies similar to doping and exterior fields like pressure or electrical fields. 2D perovskites, particularly, have been gaining a number of consideration resulting from their wonderful properties and potential purposes in next-generation optoelectronic units.
With the power to include several types of perovskites into heterostructures, there’s a huge vary of recent potentialities for optoelectronic units and purposes. Summarizing the analysis progress on these heterostructures may also help result in discoveries and developments within the area.
Progress on 2D Perovskite-Primarily based Heterostructures: A Literature Hole
Regardless of the rising curiosity in 2D perovskite-based heterostructures resulting from their distinctive optical and optoelectronic properties, there’s nonetheless a scarcity of complete assessment articles on this area.
Presently, revealed assessment research have focused on heterostructures based mostly on 3D perovskites with 2D morphologies (for example, methylammonium lead triiodide sheets or nanoplatelets) or van der Waals nanocomposites based mostly on 2D Ruddlesden-Popper (RP) perovskite supplies.
Nevertheless, when it issues heterostructures based mostly on 2D perovskite supplies with layered and non-layered substances similar to Alumina (Al2O3), 3D perovskites, and transition metallic dichalcogenides (TMDs), there’s nonetheless a niche within the literature.
Subsequently, it is very important summarize the current progress made within the area of 2D perovskite-based heterostructures, together with probably the most up to date analysis outcomes and protecting a broader vary of content material in comparison with beforehand reported assessment articles.
Highlights of the Present Assessment
On this examine, the authors current a complete overview of the newest developments in 2D perovskite-based heterostructures. The assessment focuses on the distinctive construction and bodily properties of 2D perovskites and the way they are often utilized to create heterostructures with enhanced optoelectronic properties.
The authors start by emphasizing the layered nature of 2D perovskites, which permits for the creation of skinny flakes that may be mixed with different supplies to kind heterostructures. This mixture results in the inheritance of the superb optoelectronic properties of 2D perovskites whereas additionally introducing new functionalities.
The authors then describe the development and characterization of 2D perovskite-based heterostructures, highlighting the essential optical properties of those supplies.
Additionally they present a radical overview of the potential purposes of those supplies in varied optoelectronic units, together with light-emitting diodes, photovoltaic cells, phototransistors, photodetectors, and valleytronic units.
The lead researcher, Professor Dehui Li, commented
The wealthy digital and optical physics provided by 2D perovskites renders them to be very promising for optoelectronic purposes.
Regardless of the numerous progress made within the area of 2D perovskites and their heterostructures, way more investigation remains to be wanted to completely perceive their potential. Particularly, a number of areas require additional exploration.
Firstly, acquiring high-quality pure-phase 2D perovskites with many layers is important for establishing high-quality heterostructures. At the moment, it’s difficult to synthesize very pure part perovskites with numerous layers, which hinders the extraction of intrinsic bodily properties of 2D perovskites.
There’s additionally a must develop an environment friendly artificial methodology for acquiring large-area, high-quality 2D perovskite heterostructures with a controllable progress orientation. At the moment, no common methodology exists for rationally synthesizing large-scale heterostructures with excessive crystalline high quality.
The wealthy physics of 2D perovskite-based heterostructures is usually unexplored and must be systematically studied for potential optoelectronic purposes. For instance, the consequences of natural cations on cost and electron-phonon interplay must be clarified to optimize the efficiency of optoelectronic units.
Lastly, there’s a important alternative to analyze optoelectronic options based mostly on 2D perovskite heterostructures in addition to different layered supplies. Further options and present traits could also be acquired by stacking numerous supplies collectively to generate heterostructures and multi-heterostructures.
In conclusion, 2D perovskite heterostructures maintain a lot promise for varied optoelectronic purposes, however a lot work nonetheless must be carried out to completely notice their potential.
Wang, H. et al. (2023). Two/Quasi-two-dimensional perovskite-based heterostructures: development, properties, and purposes. Worldwide Journal of Excessive Manufacturing. Out there at: https://doi.org/10.1088/2631-7990/acab40