Band-gap tuning of lead halide perovskite using a single step spin-coating deposition process
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We employ time-dependent density functional theory to study the optical properties of a squaraine sensitized TiO2 system, as a model for the corresponding dye-sensitized solar cell. The all-organic squaraine dye is particularly promising for light absorpti ...
In this paper, the pore filling of spiro-OMeTAD (2,2',7,7'-tetrakis-(N,N-di-p-methoxyphenylamine)9,9'-spirobifluorene) in mesoporous TiO2 film is quantified for the first time using XPS depth profiling and UV-Vis absorption spectroscopy. It is shown that s ...
Thermally detected optical absorption (TDOA) and photoluminescence experiments are carried out on In0.16Ga0.84N/GaN multi-quantum wells (MQWs) grown by molecular beam epitaxy on (0001) sapphire substrates. A model proposed to adjust the TDOA line shape, al ...
This thesis analyzes the properties of heavily doped nanocrystalline titanium dioxide. Thin films were deposited by magnetron sputtering with either water vapor as reactive gas or a periodically interrupted oxygen supply. The samples were at the same time ...
Thermally detected optical absorption (TDOA) and photoluminescence (PL) experiments were performed at 0.35 and 4 K, respectively, on InxGa1-xN (0 < x < 0.12) layers grown on GaN-coated sapphire substrates by molecular beam epitaxy. By modelling the absorpt ...
We report on intersubband absorption of near infrared radiation in AlN/GaN superlattice structures grown by metal-organic vapor-phase epitaxy. A good correlation between well thickness and absorption peak energy was obtained. One sample shows a photovoltai ...