Se-2 solar cells

Abstract We investigate reactively sputtered films of zirconium nitride, ZrN, for use as highly reflecting back contacts in Cu(In,Ga)Se 2 (CIGS) devices with sub-micrometer absorbers. We identify the nitrogen flow and the sputter current as the decisive parameters for the composition, and demonstrate a method for determining the nitrogen flow at which the transition from metallic to compound sputtering mode occurs for a given current. Films prepared at this working point consist of stoichiometric ZrN with a low resistivity, a high reflectance for red and infrared light, and have a fairly high sputter rate. Calculations show that the reflectance at the ZrN/CIGS interface is significantly superior to that at the standard Mo/CIGS interface

„Děti, děti, z toho kouká buď blázinec, nebo vězení!“ Vídeňský akcionismus jako reakce na válečné, osobní i společenské trauma

A group of “Viennese Actionists” was formed in Austria around 1961, ceasing to be active in 1970. One decade of their collaboration comprised creation of a series of multimedia artistic works, often in the form of provocative actions using the so-called Schweinvocabular (“nasty vocabulary”): fake violence, vulgarity, explicit sexuality, profaning state and church symbols, etc. The aim of such aesthetics was not a dull provocation; it was rather an artistic means by which the first generation of post-war artists, who personally experienced the horrors of World War II and the reverberations of the first, responded to the lack of denazification and the internal conflicts in the Austrian society. The paper will present the thesis that the designation of the group as “Viennese Actionism” is probably not derived from the noun “action”, but it is a reference to the current in behavioral psychology called sensomotoric actionism, which originated in the early 20th century and emphasized physical and performative coping with the trauma the Actionists experienced in young age (pain, suffering, loss of loved ones, mass scale of murders, etc.); sensomotoric actionism as a metaphor of artistic response to social trauma. One of the main impulses for the Actionists was thus the war trauma, both on an individual and socio-cultural level. The aesthetic means they employed were based on the actual contemporary methods of treating trauma. Using repulsive “images” that presented the horrors of war, the Actionists “forced” their audience to confront them and, if possible, go through social catharsis, giving back to the theater its ritual function it had in the society of the Classical Athenian polis

Synthesis of hydrogenated diamondlike carbon thin films using neon-acetylene based high power impulse magnetron sputtering discharges

Hydrogenated diamondlike carbon (DLC:H) thin films exhibit many interesting properties that can be tailored by controlling the composition and energy of the vapor fluxes used for their synthesis. This control can be facilitated by high electron density and/or high electron temperature plasmas that allow one to effectively tune the gas and surface chemistry during film growth, as well as the degree of ionization of the film forming species. The authors have recently demonstrated by adding Ne in an Ar-C high power impulse magnetron sputtering (HiPIMS) discharge that electron temperatures can be effectively increased to substantially ionize C species [Aijaz et al., Diamond Relat. Mater. 23, 1 (2012)]. The authors also developed an Ar-C2H2 HiPIMS process in which the high electron densities provided by the HiPIMS operation mode enhance gas phase dissociation reactions enabling control of the plasma and growth chemistry [Aijaz et al., Diamond Relat. Mater. 44, 117 (2014)]. Seeking to further enhance electron temperature and thereby promote electron impact induced interactions, control plasma chemical reaction pathways, and tune the resulting film properties, in this work, the authors synthesize DLC: H thin films by admixing Ne in a HiPIMS based Ar/C2H2 discharge. The authors investigate the plasma properties and discharge characteristics by measuring electron energy distributions as well as by studying discharge current characteristics showing an electron temperature enhancement in C2H2 based discharges and the role of ionic contribution to the film growth. These discharge conditions allow for the growth of thick (amp;gt;1 mu m) DLC: H thin films exhibiting low compressive stresses (similar to 0.5 GPa), high hardness (similar to 25 GPa), low H content (similar to 11%), and density in the order of 2.2 g/cm(3). The authors also show that film densification and change of mechanical properties are related to H removal by ion bombardment rather than subplantation. (C) 2016 American Vacuum Society.Funding Agencies|Swedish Research Council (VR) [621-2011-4280, 621-2014-4882]; MEra.Net (TANDEM); Linkoping University [Dnr-LiU-2015-01510]; Danish Council for Independent Research, Technology and Production Sciences</p