A photosensor based on lead-free perovskite-like methyl-ammonium bismuth iodide

Eckhardt K, Perez N, Rasche B, Zeugner A, Grothe J, Doert T, Nielsch K, Kaskel S (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Sensors and Actuators A-Physical Elsevier

Book Volume: 291

Pages Range: 75-79

DOI: 10.1016/j.sna.2019.03.031

Abstract

Methylammonium bismuth iodide (CH 3 NH 3 ) 3 Bi 2 I 9 (MBI) is a promising hybrid organic-inorganic material for photo-voltaic applications. A complete photodetector with a fast response time, in the order of 150 ms, was fabricated using MBI crystals grown via anti-solvent diffusion crystallization. Analyzing single crystals under varying illumination intensities clearly revealed an illumination dependant carrier density providing good photodetector performance. While band structure calculations predict a band gap of 1.4 eV, a more complex transport mechanism is revealed by Hall measurements, indicating the presence of states within the band gap close to the Fermi energy, possibly originating from crystallographic defects or internal redox processes.

Involved external institutions

Technische Universität Dresden DE Germany (DE) Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden DE Germany (DE)

How to cite

APA:

Eckhardt, K., Perez, N., Rasche, B., Zeugner, A., Grothe, J., Doert, T.,... Kaskel, S. (2019). A photosensor based on lead-free perovskite-like methyl-ammonium bismuth iodide. Sensors and Actuators A-Physical, 291, 75-79. https://doi.org/10.1016/j.sna.2019.03.031

MLA:

Eckhardt, Kai, et al. "A photosensor based on lead-free perovskite-like methyl-ammonium bismuth iodide." Sensors and Actuators A-Physical 291 (2019): 75-79.

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