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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The Thermomechanical Properties of Thermally Evaporated Bismuth Triiodide Thin Films

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Author(s):
Coutinho, Natalia F. [1] ; Cucatti, Silvia [1] ; Merlo, Rafael B. [1] ; Silva Filho, Jose Maria C. [1] ; Borrero Villegas, Nelson F. [1] ; Alvarez, Fernando [1] ; Nogueira, Ana F. [2] ; Marques, Francisco C. [1]
Total Authors: 8
Affiliation:
[1] Univ Estadual Campinas, UNICAMP, Gleb Wataghin Inst Phys, BR-13083859 Campinas, SP - Brazil
[2] Univ Estadual Campinas, UNICAMP, Inst Chem, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: SCIENTIFIC REPORTS; v. 9, AUG 13 2019.
Web of Science Citations: 0
Abstract

Bismuth triiodide (BiI3) has been studied in recent years with the aim of developing lead-free semiconductors for photovoltaics. It has also appeared in X-ray detectors due to the high density of the Bismuth element. This material is attractive as an active layer in solar cells, or may be feasible for conversion into perovskite-like material (MA(3)Bi(2)I(9)), being also suitable for photovoltaic applications. In this study, we report on the thermomechanical properties (stress, hardness, coefficient of thermal expansion, and biaxial and reduced Young's moduli) of BiI3 thin films deposited by thermal evaporation. The stress was determined as a function of temperature, adopting the thermally induced bending technique, which allowed us to extract the coefficient of thermal expansion (31 x 10(-6) degrees C-1) and Young's biaxial modulus (19.6 GPa) for the films. Nanohardness (similar to 0.76 GPa) and a reduced Young's modulus of 27.1 GPa were determined through nanoindentation measurements. (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
FAPESP's process: 17/11986-5 - Generation and storage of New Energy: bringing technological development for the country
Grantee:Ana Flávia Nogueira
Support Opportunities: Research Grants - Research Centers in Engineering Program