Dresden 2017 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 47: Organic Photovoltaics and Electronics I (joined session with CPP)

HL 47.7: Talk

Wednesday, March 22, 2017, 11:30–11:45, POT 81

Hybrid solar cells from antimony sulfide nanoparticles — •wei wang, frank strössner, eugen zimmermann, kevin wong, and lukas schmidt-mende — Department of Physics; University of Konstanz

Antimony sulfide (Sb2S3) is a promising candidate for hybrid thin film solar cells due to its various favorable properties, such as suitable optical band gap (1.75 eV), high dielectric constant and good band alignment in combination with many organic hole transport materials. In our study, amorphous Sb2S3 nanospheres were fabricated by a simple colloidial synthesis method. The Sb2S3 nanoparticles were capped by oleic acid (OA) or 1-dodecanethiol (DT) molecules. Thin film hybrid solar cells were made by using these prefabricated Sb2S3 nanoparticles as absorber material by depositing them on a TiO2 covered FTO substrate. The film was then annealed to convert the particles in a crystalline film. P3HT was deposited on top as hole transporter. The device performance of the solar cells fabricated from DT capped nanoparticles was superior to the one capped with OA ligand. Fourier transform infrared spectra (FTIR) revealed that the OA molecules were still anchored to the Sb2S3 surface after high temperature annealing, while DT molecules were almost not detectable.