Field-emission from quantum-dot-in-perovskite solids

F. Pelayo García de Arquer, Xiwen Gong, Randy P. Sabatini, Min Liu, Gi-Hwan Kim, Brandon R. Sutherland, Oleksandr Voznyy, Jixian Xu, Yuangjie Pang, Sjoerd Hoogland, David Sinton and Edward Sargent ()
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F. Pelayo García de Arquer: University of Toronto
Xiwen Gong: University of Toronto
Randy P. Sabatini: University of Toronto
Min Liu: University of Toronto
Gi-Hwan Kim: University of Toronto
Brandon R. Sutherland: University of Toronto
Oleksandr Voznyy: University of Toronto
Jixian Xu: University of Toronto
Yuangjie Pang: University of Toronto
Sjoerd Hoogland: University of Toronto
David Sinton: University of Toronto
Edward Sargent: University of Toronto

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: Abstract Quantum dot and well architectures are attractive for infrared optoelectronics, and have led to the realization of compelling light sensors. However, they require well-defined passivated interfaces and rapid charge transport, and this has restricted their efficient implementation to costly vacuum-epitaxially grown semiconductors. Here we report solution-processed, sensitive infrared field-emission photodetectors. Using quantum-dots-in-perovskite, we demonstrate the extraction of photocarriers via field emission, followed by the recirculation of photogenerated carriers. We use in operando ultrafast transient spectroscopy to sense bias-dependent photoemission and recapture in field-emission devices. The resultant photodiodes exploit the superior electronic transport properties of organometal halide perovskites, the quantum-size-tuned absorption of the colloidal quantum dots and their matched interface. These field-emission quantum-dot-in-perovskite photodiodes extend the perovskite response into the short-wavelength infrared and achieve measured specific detectivities that exceed 1012 Jones. The results pave the way towards novel functional photonic devices with applications in photovoltaics and light emission.

Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms14757

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DOI: 10.1038/ncomms14757

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