Recent and forthcoming publications in pss

III-V nanowire photovoltaics: Review of design for high efficiency

R. R. LaPierre, A. C. E. Chia, S. J. Gibson, C. M. Haapamaki, J. Boulanger, R. Yee, P. Kuyanov, J. Zhang, N. Tajik, N. Jewell, and K. M. A. Rahman

To overcome the limitations of current III-V multi-junction solar photovoltaic (PV) cells, III-V nanowire-based PV is being aggressively pursued by numerous groups. This article provides a comprehensive review of nanowire-based PV covering all aspects of design for high power conversion efficiency including nanowire growth methods, growth direction, crystal structure, optical absorption, carrier collection, strain accommodation, tunnel junctions, Ohmic contact formation, passivation and doping.

Phys. Status Solidi RRL (2013) DOI 10.1002/pssr.201307109

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Investigation of triplet harvesting and outcoupling efficiency in highly efficient two-color hybrid white organic light-emitting diodes

Simone Hofmann, Mauro Furno, Björn Lüssem, Karl Leo, and Malte C. Gather

Singlet and triplet transfer processes are studied in white triplet harvesting organic light-emitting diodes, comprising fluorescent and phosphorescent emitter molecules. The CIE coordinates of these devices can be adjusted over a wide range by varying the distance between exciton generation and triplet harvesting zone. Optical modeling of the electromagnetic field and a comparison to the position of the emitters confirms that the devices operate close to the optical optimum.

Phys. Status Solidi A (2013) DOI 10.1002/pssa.201329107

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Order-disorder processes in adamantine ternary ordered-vacancy compounds

F.J. Manjón, O. Gomis, R. Vilaplana, J.A. Sans, and H.M. Ortiz

Adamantine ternary ordered-vacancy compounds (OVCs) of the AB2X4 family derive from the zincblende structure of binary AX compounds and share many properties with the chalcopyrite-type ternary ABX2 compounds. AB2X4 mainly crystallize in the defect chalcopyrite (or thiogallate) structure but also in other vacancy-ordered phases. Order-disorder phase transitions have been studied in several adamantine OVCs at high temperatures and/or pressures, where OVCs undergo a phase transition to a disordered zincblende structure on increasing temperature and to a disordered rocksalt structure on increasing pressure. It has been suggested that these order-disorder transitions should undergo via intermediate phases of partial disorder. Manjón et al. study the different possible intermediate phases and discuss the possibility to find them with the help of vibrational spectroscopy.

Phys. Status Solidi B (2013) DOI 10.1002/pssb.201248596

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