Photovoltaic properties of BiI3 with copper interstitials

Rupam Datta; Kai Trombotto Herfert; Daniel M. Többens; Pirmin Tischler; Martin Peterlechner; Ben Breitung; Marcel Habrik; Jan Bruder; Uli Lemmer; Susan Schorr; Alexander Colsmann; Holger Röhm

doi:10.1039/D5EL00108K

Photovoltaic properties of BiI₃ with copper interstitials

Rupam Datta,

^ab Kai Trombotto Herfert,^c Daniel M. Többens,

^d Pirmin Tischler,^b Martin Peterlechner,^f Ben Breitung,

^g Marcel Habrik,^ab Jan Bruder,^ab Uli Lemmer,^b Susan Schorr,^de Alexander Colsmann

^ab and Holger Röhm

*^ab

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* Corresponding authors

^a Karlsruhe Institute of Technology (KIT), Material Research Center for Energy Systems, Strasse am Forum 7, 76131 Karlsruhe, Germany
E-mail: holger.roehm@kit.edu

^b Karlsruhe Institute of Technology (KIT), Light Technology Institute, Engesserstrasse 13, 76131 Karlsruhe, Germany

^c Karlsruhe Institute of Technology (KIT), Institute of Applied Material Research – Ceramic Materials and Technologies, Haid-und-Neu Strasse 7, 76131 Karlsruhe, Germany

^d Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin 14109, Germany

^e Institut für Geologische Wissenschaften, Freie Universität Berlin, Berlin 12249, Germany

^f Karlsruhe Institute of Technology (KIT), Laboratory for Electron Microscopy, Engesserstrasse 7, 76131 Karlsruhe, Germany

^g Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany

Abstract

The synthesis and photovoltaic effect of Cu_3xBi_1−xI₃ (CBI) thin films were studied. Although CBI was originally inspired by the material class of Caswellsilverites (also known as Rudorffites), an XRD study showed that its crystal structure resembles a BiI₃-cage with interstitial copper. CBI was found to demonstrate optoelectronic properties suitable for solar light harvesting, including a band gap of 1.66 eV and thermal stability up to 333 °C. The corresponding thin film solar cells achieved a peak power conversion efficiency of 0.65%.

EES Solar

Photovoltaic properties of BiI₃ with copper interstitials

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