Magnetic-field-induced energy bandgap reduction of perovskite KMnF3

Autor:	Ryan Taoran Wang, Alex Fan Xu, Lory Wenjuan Yang, Gu Xu, Adrian H. Kitai, Jason Yuanzhe Chen
Rok vydání:	2020
Předmět:	Materials science Photoluminescence Scanning electron microscope business.industry Band gap Field strength General Chemistry Substrate (electronics) Conductivity Electrical resistivity and conductivity Materials Chemistry Optoelectronics business Perovskite (structure)
Zdroj:	Journal of Materials Chemistry C. 8:4164-4168
ISSN:	2050-7534 2050-7526
Popis:	Broad impact may be anticipated when an energy bandgap is varied substantially by a small change in the physical environment. Such possibility has now been discovered by the example of a perovskite structure of KMnF3 in this paper, where photoluminescence, X-ray diffraction, scanning electron microscope and conductivity measurements were conducted, and the bandgap reduced up to 20% when a small magnet was placed beneath the substrate. It was also found that the electrical conductivity increased in the meantime by more than 15 folds under the 0.6 Tesla field strength. Such reduction in perovskite bandgap and enhancement in the transport properties were also observed by us in other structures, such as CH3NH3PbI3 and CsPbBr3. These discoveries are expected to improve the device performance and accelerate the commercialization.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6b45f8cec0fddb1544f5e01a7b6f905b https://doi.org/10.1039/d0tc00088d Zobrazit plný text záznamu