Detection of X-ray photons by solution-processed lead halide perovskites

Yakunin S, Sytnyk M, Kriegner D, Shrestha S, Richter M, Matt G, Azimi H, Brabec C, Stangl J, Kovalenko MV, Heiß W (2015)

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2015


Book Volume: 9

Pages Range: 444-449

Journal Issue: 7

DOI: 10.1038/nphoton.2015.82


The evolution of real-time medical diagnostic tools such as angiography and computer tomography from radiography based on photographic plates was enabled by the development of integrated solid-state X-ray photon detectors made from conventional solid-state semiconductors. Recently, for optoelectronic devices operating in the visible and near-infrared spectral regions, solution-processed organic and inorganic semiconductors have also attracted a great deal of attention. Here, we demonstrate a possibility to use such inexpensive semiconductors for the sensitive detection of X-ray photons by direct photon-to-current conversion. In particular, methylammonium lead iodide perovskite (CH3NH3PbI3) offers a compelling combination of fast photoresponse and a high absorption cross-section for X-rays, owing to the heavy Pb and I atoms. Solution-processed photodiodes as well as photoconductors are presented, exhibiting high values of X-ray sensitivity (up to 25 μC mGyair-1 cm-3) and responsivity (1.9 × 104 carriers/photon), which are commensurate with those obtained by the current solid-state technology.

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Yakunin, S., Sytnyk, M., Kriegner, D., Shrestha, S., Richter, M., Matt, G.,... Heiß, W. (2015). Detection of X-ray photons by solution-processed lead halide perovskites. Nature Photonics, 9(7), 444-449.


Yakunin, Sergii, et al. "Detection of X-ray photons by solution-processed lead halide perovskites." Nature Photonics 9.7 (2015): 444-449.

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