EE-IS Seminar

Seminar des Instituts für Silizium-Photovoltaik WS 2017/18

Das Seminar findet üblicherweise Donnerstags

am  Wilhelm-Conrad-Röntgen Campus, EE-IS Kekuléstr.5, im 1. OG. Raum 227 statt.

Es beginnt um 10:00 Uhr bei Kaffee und Keksen.

Die Vorträge beginnen um 10:15.


Seminarankündigung

Qin Tan (EE-IS)

Vacuum-assisted preparation of hybrid organic-inorganic metal halide perovskites

on 31. May 201810:00 a.m.
in the Silicon PV Seminar room

(WCRC Adlershof, 12.8, Kekulestr. 5).

Abstract:

Vacuum-assisted evaporation of solvents is a promising intermediate step for the controlled deposition of hybrid organic inorganic metal halide perovskite layers from salt solutions. The DMF:DMSO ratio, the components in the salt solutions, the temperature of the substrate during vacuum treatment (Ts) and the time of vacuum treatment (tv) were varied. The band gap and the tail states were characterized by modulated surface photovoltage spectroscopy and correlated with the current-voltage characteristics of solar cells. The band gap increased with decreasing DMF:DMSO ratio and, surprisingly, both Isc and Voc increased with increasing band gap. For CH3NH3PbI3, the optimum DMF:DMSO ratio, Ts and tv were 9:1, 30 °C and 10 s, respectively, and resulted in an efficiency above 17%. The dependence of the band gap of (CH3NH3)x(CH(NH2)2)1-xPbI3 on x was obtained. For mixed ion systems, a modified vacuum treatment including a purge with a pure gas is needed in order to reach high efficiencies.


EMIL Seminar des Instituts für Nanospectroscopy SS 2017

Neben den regulären Seminarterminen gibt es gemeinsame Veranstaltungen mit dem Institut EM ISPEK. Diese sind im Seminarplan gekennzeichnet.

Das Seminar findet üblicherweise Montags am  Wilhelm-Conrad-Röntgen Campus, EE-IS Kekuléstr.5, im 1. OG. Raum 227 statt.

Beginn: Monday 14:00