We present a measurement of the energies and capture cross-sections of defect states in methylammonium
lead bromide (MAPbBr3) single crystals. Using Laplace current deep level transient spectroscopy
(I-DLTS), two prominent defects were observed with energies 0.17 eV and 0.20 eV from
the band edges, and further I-DLTS measurements confirmed that these two defects are bulk defects.
These results show qualitative agreement with theoretical predictions, whereby all of the observed
defects behave as traps rather than as generation-recombination centers. These results provide one
explanation for the high efficiencies and open-circuit voltages obtained from devices made with lead
We have studied the defects introduced in n-type 4H-SiC during sputter deposition of tungsten using deep-level transient spectroscopy (DLTS). Current-voltage and capacitance-voltage measurements showed a deterioration of ...
In this dissertation I analyse the transformation of the South African law on the warranty against latent defects. I trace the development from pre-classical Roman law through to the enactment of the Consumer Protection ...
Germanium exhibits electron and hole mobilities that are higher than silicon. These
unique properties make Ge a promising material for the development of metal-oxide
semiconductor eld e ect transistors (MOSFETs). Point ...