3rd internal biennial science meeting of the MLZ

Water-processed hybrid solar cells

20 Jun 2017, 12:20

20m

Large Seminar room (Seminarhaus Grainau)

Parallel Session

Speaker

Dr Volker Körstgens (TU München, Physik-Department, LS Funktionelle Materialien)

Description

*in situ* studies of particular fabrication steps

Summary

Particular environmentally friendly processing of hybrid solar cells with
the solvent water is feasible with an active layer consisting of laserablated
titania and a water-soluble polythiophene [1]. One way to optimize
conversion efficiencies of these devices is the introduction of a vertical
compositional gradient of the two components of the active layer.
Dip-coating and spray-coating have been utilized as techniques which
are suitable for the cost-effective preparation of hybrid photovoltaics.
We followed the development of the morphology during spray deposition
in situ with high spatial and temporal resolution. The mesoscale
was probed with GISAXS and the crystallinity of the polymer and the
inorganic component was probed with GIWAXS. The changes of the
morphology and the influence on photovoltaic performance with the
introduction of a compositional gradient are discussed. [1] Körstgens
et al., Nanoscale 7, 2900 (2015).