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Impact of Structural Dynamics on the Optical Properties of Methylammonium Lead Iodide Perovskites

Title data

Panzer, Fabian ; Li, Cheng ; Meier, Tobias ; Köhler, Anna ; Hüttner, Sven:
Impact of Structural Dynamics on the Optical Properties of Methylammonium Lead Iodide Perovskites.
In: Advanced Energy Materials. Vol. 7 (2017) Issue 16 . - Art.Nr. 1700286.
ISSN 1614-6840
DOI: https://doi.org/10.1002/aenm.201700286

Abstract in another language

Organolead halide perovskites have attracted a lot of attention over the recent years mostly due to their bright prospective application in photovoltaic devices. For further development, characterization of their physical properties plays a seminal role in order to gain an in-depth understanding of these mid-bandgap ionic semiconductors. Their unique optical and electronic properties are a result of their characteristic electronic structure. Temperature dependent optical spectroscopy, i.e., absorption and photoluminescence (PL) characterization, gives access to their electronic nature that draws strong correlations to their structural properties. Those properties include static and dynamic disorder, and defects or phase transitions, which will be demonstrated in the first part of this research view. The second part focuses on ion migration in these hybrid semiconductors, which can strongly affect the slow dynamics of optical properties. Light-activated ions result in a number of complex processes that can lead to an increase, but also a decrease of PL intensity, or induce PL intermittency. Parameters like light intensity, crystal quality, and defect density all influence these processes, and ultimately the electronic nature of the hybrid perovskites. We will briefly summarize current achievements and point out challenges for upcoming research.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: ion migration; light soaking; methylammonium lead iodide; perovskite cells; photoluminescence
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Junior Professorship Solar Energy > Junior Professorship Solar Energy - Juniorprof. Dr. Sven Hüttner
Profile Fields > Advanced Fields > Polymer and Colloid Science
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Junior Professorship Solar Energy
Profile Fields
Profile Fields > Advanced Fields
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
500 Science > 540 Chemistry
Date Deposited: 04 Sep 2017 12:53
Last Modified: 04 Sep 2017 12:53
URI: https://eref.uni-bayreuth.de/id/eprint/39256