Colloidal bismuth sulfide nanoparticles: a photoelectrochemical study of the relationship between bandgap and particle size

Mechanical, electronic, and optical properties of Bi2S3 and Bi2Se3 compounds: first principle investigations

“…The earlier reported band gap of bulk Bi2S3 is 1.3 eV [10]. The most recent value of the band gap is reported to be in the range 1.3 -1.7 eV [11], which lies in the visible solar energy spectrum [12,13]. It has a large absorption coefficient.…”

Ultrafast Optical Spectroscopy Techniques Applied to Colloidal Nanocrystals

“…In conclusion of this chapter I will summarize the results obtained in this study [112,113,115,[117][118][119][120][121][122][123] This growing attention has not seen a parallel progress in understanding some key physical materials properties. Band gap tunability via the quantum size effect is a nanocrystal property that can be exploited to develop unique photovoltaic cell architectures for a more efficient solar light conversion.…”

“…[66,[124][125][126] Nonetheless, the question concerning the extent to which the optical band gap can be tuned in Bi 2 S 3 nanocrystals has not yet received an adequate quantitative answer. [113,123] Only recently, theoretical investigations have started addressing this issue in the framework of atomistic simulations, [127] but a systematic experimental-theoretical comparison is still missing.…”

Advances in the application of nanotechnology in enabling a ‘hydrogen economy’

“…The energy gap (and hence the absorption spectrum) of Q-dots can be tuned to energies higher than the bulk value by controlling the particle size. This property makes them attractive replacements for costly organic dyes [41][42][43][44][45][46][47]. CdS, CdSe, Bi 2 S 3 are some examples of Q-dots that have been identified to be used to improve the photocurrent response.…”