Enhanced air-stability of Sn-based hybrid perovskites induced by dimethylammonium ({DMA}): synthesis, characterization, aging and hydrogen photogeneration of the {MA}1-{xDMAxSnBr}3 system

Luigi Ermenegildo Sangaletti, Giovanni Drera, Ambra Pisanu, Andrea Speltini, Paolo Quadrelli, Lorenzo Malavasi

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

16 Citazioni (Scopus)

Abstract

Polycrystalline powder samples of the novel MA1−xDMAxSnBr3 system have been synthesized and characterized concerning their structural and optical properties. The progressive alloying on the A-site occurs up to x = 0.60 and results in a linear blue-shift of the absorption edge with the DMA content. Mixed phase samples maintain the cubic crystal structure of parent MASnBr3 with a quasi-linear expansion of the cell volume as the DMA content increases. Aging test coupled with X-ray photoelectron spectroscopy indicates that DMASnBr3 is highly tolerant against air-exposure in terms of both crystal structure and optical properties thus representing a first example of highly-stable Sn(II)-containing hybrid perovskite. In addition, thanks to such stability, proof-of-concept and demonstration of hydrogen photogeneration by DMASnBr3 is reported. Evidence of air-stabile Sn(II)-containing perovskites represent a significant further step in the development of tin-containing photovoltaic devices
Lingua originaleEnglish
pagine (da-a)7020-7026
Numero di pagine7
RivistaJOURNAL OF MATERIALS CHEMISTRY. C
Volume7
DOI
Stato di pubblicazionePubblicato - 2019

Keywords

  • hydrogen
  • perovskite
  • photocatalysis
  • photoemission

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