Fyzikální ústav Akademie věd ČR

Seminar Tuesday, 19/04/2016 10:00 - 11:00

Speakers: Peter Pikna; Hynek Němec (FZÚ AV ČR, v.v.i.)
Place: Na Slovance 2, Praha 8, přednáškový sál Fyzikálního ústavu AV ČR
Presented in English
Organisers: Oddělení tenkých vrstev a nanostruktur; Oddělení dielektrik

Ultrafast processes in nanostructured and polycrystalline silicon solar cells

Peter Pikna

Oddělení tenkých vrstev a nanostruktur

Whereas charge carrier lifetime in monocrystalline silicon is of the order of milliseconds, it is only a few nanoseconds in nanostructured and polycrystalline thin film solar cells. Investigation of crucial recombination processes in the latter materials represents a very challenging task. What happens in a nanostructured solar cell directly after illumination? Is the carrier lifetime the same under pulsed and continuous illumination? These and similar questions are going to be discussed and answered.

Conductivity mechanisms in doped SnO2 nanoparticles

Hynek Němec

Oddělení dielektrik

DC conductivity is affected by all processes involved in long-range charge transport, while terahertz conductivity carries information about charge transport on nanometer distances. Measurements using terahertz spectroscopy thus reveal conductivity inside the SnO2 nanoparticles, and they also indicate the efficiency of the charge transport between the nanoparticles. The morphology inferred from the terahertz conductivity spectra is in a good agreement with conductivity image obtained using conductive AFM.

Attachments:

piknanemec_19042016.pdf