Bismuth chalcogenide iodides Bi13S18I2 and BiSI: solvothermal synthesis, photoelectric behavior, and photovoltaic performance. Issue 11 (18th February 2020)

• Record Type: Journal Article
• Authors: Li, Sen; Xu, Linfeng; Kong, Xingang; Kusunose, Takafumi; Tsurumachi, Noriaki; Feng, Qi
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 11(2020)
• Page Start: 3821
• Page End: 3829
• Publication Date: 2020-02-18
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9tc05139b
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Bismuth chalcogenide iodides Bi13 S18 I2 and BiSI were synthesized and characterized as light absorbers for solar cells. Abstract : Bismuth chalcogenide iodides Bi13 S18 I2 and BiSI were synthesized and characterized as light absorbers for solar cells. The formations of Bi13 S18 I2 and BiSI can be controlled via a facile solvothermal process. BiSI is formed under low S/Bi mole ratio conditions but it easily converts to Bi13 S18 I2 under high S/Bi mole ratio conditions. Bi13 S18 I2 is an n-type semiconductor with a narrow bandgap of 0.75 eV and exhibits a strong light absorbance in the wide wavelength range from UV to NIR, making it a promising light absorber material for solar cells. A uniform B13 S18 I2 nanorod film was fabricated on a porous TiO2 electrode via a modified solvothermal process for a photovoltaic study. A Bi13 S18 I2 -based solar cell has demonstrated a power conversion efficiency of 0.85% for the first time, revealing the potential of Bi13 S18 I2 as a new type of light absorber material for solar cells which can be fabricated via a low-cost solution process.