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Impact of Bi3+ heterovalent doping in organic-inorganic metal halide perovskite crystals

Intrinsic organic-inorganic metal halide perovskites (OIHP) based semiconductors have shown wide applications in optoelectronic devices. There have been several attempts to incorporate heterovalent metal (e.g., Bi3+) ions in the perovskites in an attempt to induce electronic doping and increase the...

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Hauptverfasser: Nayak, Pabitra K. (Verfasst von) , Sendner, Michael (Verfasst von) , Lovrinčić, Robert (Verfasst von) , Pucci, Annemarie (Verfasst von)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 2018
In: Journal of the American Chemical Society
Year: 2017, Jahrgang: 140, Heft: 2, Pages: 574-577
ISSN:1520-5126
DOI:10.1021/jacs.7b11125
Online-Zugang:Verlag, Volltext: https://doi.org/10.1021/jacs.7b11125
Volltext
Verfasserangaben:Pabitra K. Nayak, Michael Sendner, Bernard Wenger, Zhiping Wang, Kshama Sharma, Alexandra J. Ramadan, Robert Lovrinčić, Annemarie Pucci, P.K. Madhu, and Henry J. Snaith
Beschreibung
Zusammenfassung:Intrinsic organic-inorganic metal halide perovskites (OIHP) based semiconductors have shown wide applications in optoelectronic devices. There have been several attempts to incorporate heterovalent metal (e.g., Bi3+) ions in the perovskites in an attempt to induce electronic doping and increase the charge carrier density in the semiconductor. It has been reported that inclusion of Bi3+ decreases the band gap of the material considerably. However, contrary to the earlier conclusions, despite a clear change in the appearance of the crystal as observed by eye, here we show that the band gap of MAPbBr3 crystals does not change due the presence of Bi3+ in the growth solution. An increased density of states in the band gap and use of very thick samples for transmission measurements, erroneously give the impression of a band gap shift. These sub band gap states also act as nonradiative recombination centers in the crystals.
Beschreibung:Gesehen am 22.01.2020
Published: December 21, 2017
Im Titel ist "3+" hochgestellt
Beschreibung:Online Resource
ISSN:1520-5126
DOI:10.1021/jacs.7b11125

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