Tuning the Bandgap in Silver Bismuth Iodide Materials by Partly Substituting Bismuth with Antimony for Improved Solar Cell Performance

Zhu, Huimin (author): Uppsala Univ, Dept Chem, Angstrom Lab, Div Phys Chem, S-75120 Uppsala, Sweden.

Erbing, Axel (author): Stockholms universitet,Fysikum,Stockholm Univ, Dept Phys, S-10691 Stockholm, Sweden.

Wu, Hua (author): Uppsala universitet,Institutionen för kemi - Ångström,Jilin Univ, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China.;Jilin Univ, Coll Elect Sci & Engn, Changchun 130012, Peoples R China.

Man, Gabriel (author): Uppsala universitet,Molekyl- och kondenserade materiens fysik

Mukherjee, Soham (author): Uppsala universitet,Molekyl- och kondenserade materiens fysik

Kamal, Chinnathambi (author): Stockholms universitet,Fysikum,Raja Ramanna Centre for Advanced Technology, India,Stockholm Univ, Dept Phys, S-10691 Stockholm, Sweden.;Raja Ramanna Ctr Adv Technol, Theory & Simulat Lab, HRDS, Indore 452013, India.

Rensmo, Håkan (author): Uppsala universitet,Molekyl- och kondenserade materiens fysik

Odelius, Michael (author): Stockholms universitet,Fysikum,Stockholm Univ, Dept Phys, S-10691 Stockholm, Sweden.

Uppsala Univ, Dept Chem, Angstrom Lab, Div Phys Chem, S-75120 Uppsala, Sweden Fysikum (creator_code:org_t)

2020-07-16
2020
English.
In: ACS Applied Energy Materials. - : American Chemical Society (ACS). - 2574-0962. ; 3:8, s. 7372-7382

Related links:: https://doi.org/10.1...; show more...; https://pubs.acs.org...; https://uu.diva-port... (primary) (Raw object); https://urn.kb.se/re...; https://doi.org/10.1...; https://urn.kb.se/re...; show less...

Abstract Subject headings

Silver bismuth iodide (Ag–Bi–I) light absorbers are interesting candidates as lead-free and low-toxic metal-halide materials for solar cell applications. In this work, the partial exchange of bismuth, Bi, with antimony, Sb, is investigated in samples prepared from a solution targeting stoichiometry AgBi2I7. Samples with a gradually increased exchange of Bi by Sb are prepared and light absorption measurements show that the absorption edge is gradually blue-shifted with increasing the amount of Sb. This trend in the shift in combination with the X-ray diffraction and X-ray photoelectron spectroscopy measurements, suggest that new materials with a mixture of Sb and Bi are formed. The density functional theory based electronic structure calculations reproduce the trend observed in the experiments when including spin–orbit coupling, which indicates the importance of relativistic effects in these materials. X-ray photoelectron spectroscopy is used to characterize the materials, and confirms the exchange of Bi to Sb in the samples. When Sb is included in the material, the grain size changes between 50 and 200 nm and the solar cell performance also changes. An optimal power conversion efficiency with excellent reproducibility and stability is obtained for a solar cell with the ratio of Sb/Bi equal to 3.

By the author/editor: Zhu, Huimin; Erbing, Axel; Wu, Hua; Man, Gabriel; Mukherjee, Soham; Kamal, Chinnatha ...; show more...; Johansson, Malin ...; Rensmo, Håkan; Odelius, Michael; Johansson, Erik; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Materials Chemis ...

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.