Birgit Kammlander
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View article: Interfacial Chemistry Limits the Stability of Deep Blue Perovskite LEDs Revealed by Operando Characterization
Interfacial Chemistry Limits the Stability of Deep Blue Perovskite LEDs Revealed by Operando Characterization Open
To commercialize lead halide perovskites as light-emitting diodes (LEDs), the operational device lifetime needs to be drastically improved. For this to be achieved, an understanding of degradation behavior under bias is crucial. Herein, we…
View article: Investigating charge dynamics at lead halide perovskite single crystal surfaces
Investigating charge dynamics at lead halide perovskite single crystal surfaces Open
To further develop lead halide perovskites for their application in solar cells, understanding the material’s fundamental behavior under illumination is necessary. Investigating light-induced charge dynamics in single crystals can give ins…
View article: Ultrafast charge transfer dynamics in lead sulfide quantum dots probed with resonant Auger spectroscopy at the lead M-edge
Ultrafast charge transfer dynamics in lead sulfide quantum dots probed with resonant Auger spectroscopy at the lead M-edge Open
We investigate charge transfer dynamics in PbS quantum dots of varying sizes, bulk PbS, and PbI 2 reference samples using Resonant Auger- (RAS) and Core-Hole Clock Spectroscopy (CHCS).
View article: Interface-resolved photovoltage generation dynamics and band structure evolution in a PbS quantum dot solar cell
Interface-resolved photovoltage generation dynamics and band structure evolution in a PbS quantum dot solar cell Open
The charge separation and recombination dynamics at different interfaces in a quantum dot solar cell are investigated by time-resolved photoelectron spectroscopy.
View article: Composition dependence of X-ray stability and degradation mechanisms at lead halide perovskite single crystal surfaces
Composition dependence of X-ray stability and degradation mechanisms at lead halide perovskite single crystal surfaces Open
We studied the X-ray stability of five different clean perovskite single crystal surfaces (MAPbI 3 , MAPbBr 3 , MAPbCl 3 , FAPbBr 3 , CsPbBr 3 ) via photoelectron spectroscopy and observed different degradation paths depending on the exact…
View article: Interface Energy Alignment between Lead Halide Perovskite Single Crystals and TIPS-Pentacene
Interface Energy Alignment between Lead Halide Perovskite Single Crystals and TIPS-Pentacene Open
At present, there is a huge development in optoelectronic applications using lead halide perovskites. Considering that device performance is largely governed by the transport of charges across interfaces and, therefore, the interfacial ele…
View article: Experimental and Theoretical Core Level and Valence Band Analysis of Clean Perovskite Single Crystal Surfaces
Experimental and Theoretical Core Level and Valence Band Analysis of Clean Perovskite Single Crystal Surfaces Open
A detailed understanding of the surface and interface properties of lead halide perovskites is of interest for several applications, in which these materials may be used. To develop this understanding, the study of clean crystalline surfac…
View article: Thermal degradation of lead halide perovskite surfaces
Thermal degradation of lead halide perovskite surfaces Open
The thermal degradation temperature of perovskite single crystal surfaces (MAPbI 3 , MAPbBr 3 , FAPbBr 3 ) depends more on the halide than on the organic cation. However, different solid degradation products form depending on the cation.
View article: Unravelling the ultrafast charge dynamics in PbS quantum dots through resonant Auger mapping of the sulfur K-edge
Unravelling the ultrafast charge dynamics in PbS quantum dots through resonant Auger mapping of the sulfur K-edge Open
By measuring the resonant S-KLL Auger decay we investigate the attosecond charge transfer in PbS quantum dots of different sizes. The results show both intra- and interparticle charge transfer, where the former shows a strong QD size depen…