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Cited by 375

The DOI matches its Crossref record; 34 of the 34 references it cites were found in a registry or an index.

Optoelectronic Properties of (CH3NH3)3Sb2I9 Thin Films for Photovoltaic Applications

Hebig, Jan-Christoph, Kühn, Irina, Flohre, Jan, Kirchartz, Thomas·2016·ACS Energy Letters

Abstract

We present solution-based fabrication and characterization of the lead-free perovskite-related methylammonium antimony iodide (CH 3 NH 3 ) 3 Sb 2 I 9 compound. By photothermal deflection spectroscopy (PDS), we determined a peak absorption coefficient α ≈ 10 5 cm –1 and an optical band gap of 2.14 eV for amorphous films of (CH 3 NH 3 ) 3 Sb 2 I 9 . Compared to the related Bi compound, the Sb-perovskite shows no exciton peak in its absorption spectrum. The photoluminescence emission (PL) is observed at 1.58 eV, and the Urbach tail energy of this amorphous compound is E u = 62 meV, indicating a substantial amount of energetic disorder. We fabricate a planar heterojunction solar cell with a (CH 3 NH 3 ) 3 Sb 2 I 9 absorber layer that yields a power conversion efficiency of η ≈ 0.5%, already featuring a decent fill factor (FF) of 55% and open-circuit voltage of 890 mV but low photocurrent densities. The result of this basic study on (CH 3 NH 3 ) 3 Sb 2 I 9 shows that this compound is a possible starting point for further research into Sb-based lead-free perovskite solar cells.

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Metadata

Authors
Hebig, J.-C., Kühn, I., Flohre, J., & Kirchartz, T.
Venue
ACS Energy Letters
Published
2016-06-24
Volume
1
Issue
1
Pages
309-314
ISSN
2380-8195 (ISSN-L)
OpenAlex
W2469798057
Cited by
375
References
34
FWCI
21.04
Type
journal article
Language
en
Open access
closed

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Hebig, J.-C., Kühn, I., Flohre, J., & Kirchartz, T. (2016). Optoelectronic Properties of (CH3NH3)3Sb2I9 Thin Films for Photovoltaic Applications. ACS Energy Letters. https://doi.org/10.1021/acsenergylett.6b00170

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