Photoconduction at the diffusion length limit

Nanocrystals became an essential building blocks of modern optoelectronics. In the infrared, HgTe nanocrystals are used for the fabricate cameras and LEDs. In these polycrystalline materials, hopping has often been seen as a bottleneck to their performance. Members of the team of physical chemistry of the INSP have shown that by adapting the geometry of the device, it is possible to obtain photoconduction properties as high as bulk materials.

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References

[1] Mercury Chalcogenide Quantum Dots : Material Perspective for Device Integration, C. Gréboval et al., Chemical Reviews 121, 3627 (2021).
[2] Quantum dot solids showing state-resolved band-like transport, X. Lan et al., Nat. Mater. 19, 323 (2020).
[3] Infrared photoconduction at the diffusion length limit in HgTe nanocrystal arrays, A Chu et al., Nature Communications 12, 1794 (2021)

Article

Emmanuel Lhuillier : el(at)insp.jussieu.fr

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