Size-tunable and monodisperse lead sulfide quantum dots for broadband photodetectors
Source abstract
Abstract
Lead sulfide quantum dots (PbS QDs) are used in broadband photodetectors due to their excellent size tunability, photosensitivity, and solution processability. However, due to the risk of Ostwald ripening, synthesizing high-quality PbS QDs with absorption peaks over 2000 nm with high monodispersity is a challenge. In this study, by controlling the molar ratio of Pb to S and the number of injections of S precursor, we successfully prepared large PbS QDs with an absorption peak at 2122 nm, corresponding to an average diameter of 11.42 nm, with a super-mono-dispersity of 5.50%. Broadband photodetectors ranging from visible light to short-wave infrared are prepared using the large PbS QDs, corresponding to a response rate of 5.98 mA/W at 1940 nm.
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Research context
OpenAlex topics: Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films · Gold and Silver Nanoparticles Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (39)
Show source-provided references
1. Solution-processed semiconductors for next-generation photodetectors10.1038/natrevmats.2016.100 ↗
2. Integration of colloidal quantum dots with photonic structures for optoelectronic and optical devices10.1002/advs.202101560 ↗
3. Ultrasensitive solution-cast quantum dot photodetectors10.1038/nature04855 ↗
4. Room-temperature infrared photodetectors with zero-dimensional and new two-dimensional materials10.3390/coatings12050609 ↗
5. Lead sulphide nanocrystal photodetector technologies10.1038/nphoton.2015.280 ↗
6. Nanostructured materials for photon detection10.1038/nnano.2010.78 ↗
7. Electronic structure and optical properties of PbS and PbSe quantum dots10.1364/josab.14.001632 ↗
8. Quantum size effects in the redox potentials, resonance Raman spectra, and electronic spectra of CdS crystallites in aqueous solution10.1063/1.445834 ↗
9. Nanocrystal quantum dot devices: How the lead sulfide (PbS) system teaches us the importance of surfaces10.2533/chimia.2021.398 ↗
10. Control of Ostwald ripening10.1007/s40843-022-2233-3 ↗
11. Kinetics of Ostwald ripening in the presence of monomer diffusion along grain boundaries10.1080/09500830701528727 ↗
12. Kinetics of particle coarsening with allowance for Ostwald ripening and coagulation10.1088/0953-8984/28/3/035102 ↗
13. Efficient white photoluminescence from self-trapped excitons in Sb3+/Bi3+-codoped Cs2NaInCl6 double perovskites with tunable dual-emission10.1021/acsenergylett.1c01442 ↗
14. Oriented lateral growth of two-dimensional materials on c-plane sapphire10.1038/s41565-023-01445-9 ↗
15. Colloidal PbS nanocrystals with size-tunable near-infrared emission: Observation of post-synthesis self-narrowing of the particle size distribution10.1002/adma.200305395 ↗
16. Size-dependent PbS quantum dot surface chemistry investigated via gel permeation chromatography10.1021/acs.chemmater.0c02024 ↗
17. Synthesis and characterization of nearly monodisperse CdE (E = sulfur, selenium, tellurium) semiconductor nanocrystallites10.1021/ja00072a025 ↗
18. Modeling of nucleation and growth in the synthesis of PbS colloidal quantum dots under variable temperatures10.1021/acsomega.0c05223 ↗
19. Size-dependent optical properties of colloidal PbS quantum dots10.1021/nn900863a ↗
20. Multigram scale, solventless, and diffusion-controlled route to highly monodisperse PbS nanocrystals10.1021/jp0563585 ↗
21. Size tunable and controllable synthesis of PbS quantum dots for broadband photoelectric response10.1016/j.optmat.2023.113977 ↗
22. Size-tunable, bright, and stable PbS quantum dots: A surface chemistry study10.1021/nn103050w ↗
23. Long-wavelength lead sulfide quantum dots sensing up to 2600 nm for short-wavelength infrared photodetectors10.1021/acsami.9b16539 ↗
24. Inorganic UV–visible–SWIR broadband photodetector based on monodisperse PbS nanocrystals10.1002/smll.201503244 ↗
25. Physicochemical evaluation of the hot-injection method, a synthesis route for monodisperse nanocrystals10.1002/smll.200500239 ↗
26. Effect of Pb:S molar ratio in precursor solution on the properties of lead sulphide thin films by ultrasonic spray pyrolysis10.1016/j.mssp.2017.07.007 ↗
27. Monodisperse, air-stable PbS nanocrystals via precursor stoichiometry control10.1021/nn5018654 ↗
28. Large-scale programmable synthesis of PbS quantum dots10.1002/cphc.201500909 ↗
29. Synthesis and characterization of monodisperse nanocrystals and close-packed nanocrystal assemblies10.1146/annurev.matsci.30.1.545 ↗
30. High responsivity, broadband, and fast graphene/silicon photodetector in photoconductor mode10.1002/adom.201500127 ↗
31. PbS colloidal quantum dot photoconductive photodetectors: Transport, traps, and gain10.1063/1.2800805 ↗
32. Photovoltaic high-performance broadband photodetector based on MoS2/Si nanowire array heterojunction10.1016/j.solmat.2018.03.017 ↗
33. 1991
34. An ultrasensitive gateless photodetector based on the 2D bilayer MoS2–1D Si nanowire–0D Ag nanoparticle hybrid structure10.1021/acsami.0c15819 ↗
35. Single-/fused-band dual-mode mid-infrared imaging with colloidal quantum-dot triple-junctions10.1364/prj.458351 ↗
36. Dual-band infrared imaging using stacked colloidal quantum dot photodiodes10.1038/s41566-019-0362-1 ↗
37. Two-dimensional Cs2AgBiBr6/WS2 heterostructure-based photodetector with boosted detectivity via interfacial engineering10.1021/acsnano.1c09513 ↗
38. Achieving tunable cold/warm white-light emission in a single perovskite material with near-unity photoluminescence quantum yield10.1007/s40820-023-01168-5 ↗
39. Interlayer exciton dynamics of transition metal dichalcogenide heterostructures under electric fields10.1007/s12274-023-6325-3 ↗