The subject of this book is the investigation of lattice imperfections in semiconductors by
means of positron annihilation. A comprehensive review is given of the different positron …

The electronic defects in any semiconductor play a decisive role for the usability of this
material in an optoelectronic device. Electronic defects determine the doping level as well as …

The recent achievements of high-efficiency Cu (In, Ga) Se 2 heterojunction solar cells are
reviewed with a special focus on the understanding of the electronic transport properties of …

Stability aspects of the Mo/Cu (In, Ga) Se2/CdS/ZnO solar cell are reviewed and assessed.
These include (i) the chemical stability of the various interfaces present in the device,(ii) the …

Is “self‐healing” the source of the stability of Cu (In, Ga) Se2‐based solar modules? The
proven remarkable stability and radiation hardness of Cu (In, Ga) Se2 (CIGS) solar cells …

A study on the induced changes in the vacancy-like defect structure and the dielectric
properties of K 0.5 Na 0.5 NbO 3 ceramics by the addition of different amounts, between 0 …

Polycrystalline ZnO/CdS/Cu (In, Ga) Se2 heterojunction solar cells display a very high
radiation resistance under 1-MeV electrons. We irradiated high-efficiency Cu (In, Ga) Se2 …

Cu (In, Ga) Se2 (CIGS) based photovoltaic cells have demonstrated the highest solar energy
conversion efficiencies ever for thin film devices. They also exhibit excellent stability in field …

The electronic properties of high-efficiency CuInSe 2 (CIS)-based solar cells are affected by
the microstructural features of the absorber layer, such as point defect types and their …

Magneto-resistance measurements coupled with positron lifetime measurements, to
characterize the vacancy-type defects, have been carried out on the topological insulator (TI) …