Thermal Evaporated Bismuth Triiodide (BiI3) Thin Films for Photovoltaic Applications

Author(s)

Coutinho, Natalia F. ^[1] ; Menlo, Rafael B. ^[1] ; Borrero, V, Nelson F. ; Marques, Francisco C. ^[2]

Affiliation

^[1] Univ Estadual Campinas, Gleb Wataghin Inst Phys, BR-13083859 Campinas, SP - Brazil

^[2] Borrero, Nelson F., V, Univ Estadual Campinas, Gleb Wataghin Inst Phys, BR-13083859 Campinas, SP - Brazil

• Document type: Journal article
• Source: MRS ADVANCES; v. 3, n. 55, p. 3233-3236, 2018.
• Web of Science Citations: 2

Abstract

Bismuth triiodide (BiI3) is a potential candidate for application in solar cell due to its good optoelectronic properties and because it is free of toxic elements. It can be used as the absorber material in solar cells or converted into the perovskite-like material MA(3)Bi(2)I(9), suitable also for photovoltaic applications. Bismuth triiodide has been prepared by physical vapour transport (PVT) and by solution process through spin coating. In this work we present optical and structural/topological properties of BiI3 deposited by thermal evaporation under high vacuum. The films are slightly tensile, polycrystalline, homogenously distributed and with good adherence on several substrates, with an indirect bandgap of 1.81 eV, index of refraction of 3.3 (630 nm), photoluminescence centered at 1.74 eV and a Raman peak at 118cm(-1) associated with the A(g) mode. (AU)

• FAPESP's process: 12/10127-5 - Research and development of nanostructured materials for electronic and surface physics applications
• Grantee: Fernando Alvarez
• Support Opportunities: Research Projects - Thematic Grants