Publication: Electrical and optical properties of composite PEDOT: PSS-based thin films with NiO nanoparticles
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2020-05-08
Authors
Moldarev, D.
Karazhanov, Smagul Zh
Marstein, E.
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Elsevier
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Abstract
Due to the combination of low cost materials deposition and device fabrication methods as well as competitive efficiency compared to the other Si solar cell architectures, the hybrid organic-silicon solar cells have attracted attention of the scientific community. It has recently been demonstrated that spin-coated poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (hereafter PEDOT:PSS) on a silicon wafer is a promising material due to its good optical and electrical properties. However, degradation caused by atmospheric exposure and relatively poor passivation properties limits implementation of PEDOT:PSS- silicon devices. Functionalization of PEDOT:PSS by inorganic nanoparticles might provide a possible solution as was shown for TiO_2 and SnO_2 nanoparticles. In this contribution, we present our results on spincoated PEDOT:PSS thin-films with NiO nanoparticles. We show that PEDOT:PSS mixed with Triton X-100 and dimethyl sulfoxide (DMSO) or ethylene glycol (EG) form a homogenous film and passivates the Si surface with charge carrier lifetimes of 300-400 ms with good reproducibility. Time-resolved measurements revealed continuous degradation of the passivation properties in air, however saturation of the degradation at approximately 150 ms was observed in N_2 atmosphere. The influence of the NiO nanoparticles on the optical properties of PEDOT:PSS is negligible, whereas the surface passivation properties are worsened due probably to the formation of large size agglomerates exceeding thickness of PEDOT:PSS film.
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© 2020 Elsevier.
Available online 8 May 2020.
Symposium on Metal Oxide- and Oxyhydride-Based Nanomaterials for Energy and Environment-Related Applications of the E-MRS (2019. Varsovia)
This work was financially supported by the Research Council of Norway through M-ERA.net project 272806 and by MINECO PCIN-2017-106M-ERA.net project. Authors would also like to thank IFE staff involved in HYMATSIREN project for fruitful discussions and practical help in the lab.