journal article·2019-08-26

Bandgap Tuning of Silver Bismuth Iodide via Controllable Bromide Substitution for Improved Photovoltaic Performance

Hua Wu, Huimin Zhu, Axel Erbing, Malin B. Johansson, Soham Mukherjee, Gabriel J. Man, Håkan Rensmo, Michael Odelius, Erik M. J. Johansson

ACS Applied Energy Materials· Volume 2· Issue 8
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Abstract

In this work, silver–bismuth–halide thin films, exhibiting low toxicity and good stability, were explored systemically by gradually substituting iodide, I, with bromide, Br, in the AgBi2I7 system. It was found that the optical bandgap can be tuned by varying the I/Br ratio. Moreover, the film quality was improved when introducing a small amount of Br. The solar cell was demonstrated to be more stable at ambient conditions and most efficient when incorporating 10% Br, as a result of decreased recombination originating from the increased grain size. Thus, replacing a small amount of I with Br was beneficial for photovoltaic performance.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemistry—Ångström-Laboratory, Institution of Physical Chemistry, Uppsala University, Uppsala 75120, Sweden

State Key Laboratory on Integrated Optoelectronics and College of Electronic Science and Engineering, Jilin University, Changchun 130012, China

Department of Physics, Stockholm University, AlbaNova University Center, Stockholm 10691, Sweden

Molecular and Condensed Matter Physics, Department of Physics and Astronomy, Uppsala University, Uppsala 75120, Sweden

Funding

Vetenskapsr?det · Energimyndigheten · Carl Tryggers Stiftelse f?r Vetenskaplig Forskning · China Scholarship Council

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