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Toward High‐Performance Photodetectors Based on Quasi‐2D Ruddlesden‐Popper Mixed‐n Perovskite Nanomaterials
Brindhu Malani S,
Eugen Klein,
Rostyslav Lesyuk,
Christian Klinke
Advanced Functional Materials, Start page: 2416027
Swansea University Author: Christian Klinke
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DOI (Published version): 10.1002/adfm.202416027
Abstract
The excellent optoelectronic properties, straightforward synthesis, and robust material stability of quasi‐2D metal halide perovskites have made them a hot research topic for optoelectronic devices. In layered organic–inorganic perovskites, the optoelectronic properties are greatly influenced by mor...
| Published in: | Advanced Functional Materials |
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| ISSN: | 1616-301X 1616-3028 |
| Published: |
Wiley
2024
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa68564 |
| Abstract: |
The excellent optoelectronic properties, straightforward synthesis, and robust material stability of quasi‐2D metal halide perovskites have made them a hot research topic for optoelectronic devices. In layered organic–inorganic perovskites, the optoelectronic properties are greatly influenced by morphology and quantum confinement, which are crucial for their photodetection performance and offer an excellent tunability tool. Here the optoelectronic properties and photodetection performance of quasi‐2D methylammonium lead bromide perovskites with three different morphologies nanoplatelets, nanosheets, and nanostripes produced by colloidal hot injection technique are investigated. The structural and optical characterization reveals the mixed‐n phases with varying extents of confinement. The study shows that nanostripes with the weak confinement effect exhibit superior photodetection performance. They demonstrate the highest photoresponsivity (R), external quantum efficiency (EQE), and detectivity (D) of 183 mA W−1, 56% and 2.9 × 1011 Jones respectively. They also show the highest on/off ratio and fastest photoresponse (rise time (τ r ) = 3.4 and fall time (τ f ) = 4.3 ms) in comparison to nanoplatelets and nanosheets. The study will aid in realizing an inexpensive high‐performance photodetector based on nanoparticles of quasi‐2D perovskites. |
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| Keywords: |
3dB frequency, photodetection, quantum confinement, quasi‐2D perovskite, responsivity |
| College: |
Faculty of Science and Engineering |
| Funders: |
B.M.S. acknowledges Alexander von Humboldt-Stiftung/Foundation for the postdoctoral research fellowship. B.M.S also acknowledges Ronja Piehler for insightful discussions and technical help. Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) is acknowledged for funding of SFB 1477 “Light-Matter Interactions at Interfaces”, project number 441234705, W03, and W05. C. K. also acknowledges the European Regional Development Fund of the European Union for funding the PL spectrometer (GHS-20-0035/P000376218) and X-ray diffractometer (GHS-20-0036/P000379642) and the DFG for funding an electron microscope Jeol NeoARM TEM (INST 264/161-1 FUGG) and an electron microscope Thermo Fisher Talos L120C (INST 264/188-1 FUGG).
Open access funding enabled and organized by Projekt DEAL. |
| Start Page: |
2416027 |