Exciton absorption spectrum of thin CsPbI3 and Cs4PbI6 films

A method for preparing thin films of CsPbI 3 and Cs 4 PbI 6 complex compounds has been developed. Their absorption spectrum is investigated in the energy range of 2–6 eV at temperatures from 90 to 500 K. It is found that the CsPbI 3 compound is unstable and passes to the Cs 4 PbI 6 phase upon heatin...

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Veröffentlicht in:	Optics and spectroscopy 2012, Vol.112 (1), p.91-96
Hauptverfasser:	Yunakova, O. N., Miloslavskii, V. K., Kovalenko, E. N.
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed-Matter Spectroscopy Lasers Optical Devices Optics Photonics Physics Physics and Astronomy
Online-Zugang:	Volltext
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Zusammenfassung:	A method for preparing thin films of CsPbI 3 and Cs 4 PbI 6 complex compounds has been developed. Their absorption spectrum is investigated in the energy range of 2–6 eV at temperatures from 90 to 500 K. It is found that the CsPbI 3 compound is unstable and passes to the Cs 4 PbI 6 phase upon heating at T ≥ 400 K.
ISSN:	0030-400X 1562-6911
DOI:	10.1134/S0030400X12010249