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- Donzel-Gargand, Olivier, et al.
(författare)
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Deep surface Cu depletion induced by K in high-efficiency Cu(In,Ga)Se2 solar cell absorbers
- 2018
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Ingår i: Progress in Photovoltaics. - : Wiley. - 1062-7995 .- 1099-159X. ; 26:9, s. 730-739
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Tidskriftsartikel (refereegranskat)abstract
- In this work, we used K‐rich glass substrates to provide potassium during the coevaporation of Cu(In,Ga)Se2 (CIGS) absorber layers. Subsequently, we applied a postdeposition treatment (PDT) using KF or RbF to some of the grown absorbers. It was found that the presence of K during the growth of the CIGS layer led to cell effi- ciencies beyond 17%, and the addition of a PDT pushed it beyond 18%. The major finding of this work is the observation of discontinuous 100‐ to 200‐nm‐deep Cu‐ depleted patches in the vicinity of the CdS buffer layer, correlated with the presence of K during the growth of the absorber layer. The PDT had no influence on the forma- tion of these patches. A second finding concerns the composition of the Cu‐depleted areas, where an anticorrelation between Cu and both In and K was measured using scanning transmission electron microscopy. Furthermore, a steeper Ga/(In+Ga) ratio gradient was measured for the absorbers grown with the presence of K, suggesting that K hinders the group III element interdiffusion. Finally, no Cd in‐diffusion to the CIGS layer could be detected. This indicates that if CdCu substitution occurs, either their concentration is below our instrumental detection limit or its presence is contained within the first 6 nm from the CdS/CIGS interface.
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- Edoff, Erik, 1987-
(författare)
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I läktarvåldet försvann opartiskheten
- 2022
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Ingår i: På mediernas planhalva. - Stockholm : Institutet för mediestudier. - 9789198709827 ; , s. 64-73
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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- Edoff, Erik, 1987-
(författare)
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Storstadens dagbok : Boulevardpressen och mediesystemet i det sena 1800-talets Stockholm
- 2016
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis explores the late 19th century boulevard press in Stockholm. The study is based on four weekly boulevard newspapers during the period: Figaro, Vikingen [The Viking], Budkaflen [The Fiery Cross] and Hvad Nytt [What’s New]. The main focus of the boulevard press was high-society people and the theatres and restaurants these visited. The aim of the dissertation is to investigate this journalistic genre, with specific regard to its place and role in the contemporary media system and to its construction of Stockholm as a metropolis. The analytical perspective is inspired by scholarship on the cultural history of the media, from which the concept of a media system is derived. Besides a broad media concept, the core approach is that all media are in various ways related to many other phenomena in society, including other media forms. The boulevard press was linked to other newspapers, restaurants, cafés, wax museums, reprints, guide literature, theatres and variety shows. These were also the boulevard papers’ main advertisers, thus showing the important interconnectedness between different parts on the sheets of the papers. Advertising meant positive publicity, also in the reporting. The thesis identifies two main perspectives of the boulevard-paper journalists. The reporter guided his readers in the tram around the city and on walkabouts among shops, thus stressing his mobility. The other perspective concerns the overview of the columnist. His elevated perspective was an important attribute when the newspapers summarised and presented the big city as a whole. The journalists acted as witness-ambassadors (Géraldine Muhlmann) and through this legitimacy they constructed a mediated centre (Nick Couldry), stressing what was inside and what was not. One important result is that the boulevard papers were media of self-promotion. The boulevard press was, hereby, an important actor in processes of professionalization and defining the role of the press.
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