Bandgap Tunable Ternary Cd x Sb2-y S3-δ Nanocrystals for Solar Cell Applications.

ABSTRACT: We report the synthesis and photovoltaic performance of a new nonstoichiometric ternary metal sulfide alloyed semiconductor-Cd x Sb2-y S3-δ nanocrystals prepared by the two-stage sequential ionic layer adsorption reaction technique. The synthesized Cd x Sb2-y S3-δ nanocrystals retain the orthorhombic structure of the host Sb2S3 with Cd substituting a fraction (x = 0-0.15) of the cationic element Sb. The Cd x Sb2-y S3-δ lattice expands relative to the host, Sb2S3, with its lattice constant a increasing linearly with Cd content x. Optical and external quantum efficiency (EQE) spectra revealed that the bandgap E g of Cd x Sb2-y S3-δ decreased from 1.99 to 1.69 eV (i.e., 625-737 nm) as x increased from 0 to 0.15. Liquid-junction Cd x Sb2-y S3-δ quantum dot-sensitized solar cells were fabricate

SUBMITTER: Boon-On P 

PROVIDER: S-EPMC6963896 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature