@misc{BaerSchubertMarsenetal., author = {B{\"a}r, Marcus and Schubert, Bj{\"o}rn-Arvid and Marsen, Bj{\"o}rn and Wilks, Regan G. and Pookpanratana, Sujitra and Blum, Monika and Krause, Stefan and Unold, Thomas and Yang, Wan Li and Weinhardt, Lothar and Heske, Clemens and Schock, Hans-Werner}, title = {Cliff-like conduction band offset and KCN-induced recombination barrier enhancement at the CdS/Cu2ZnSnS4 thin-film solar cell heterojunction}, abstract = {The electronic structure of the CdS/Cu2ZnSnS4 (CZTS) heterojunction was investigated by direct and inverse photoemission. The effects of a KCN etch of the CZTS absorber prior to CdS deposition on the band alignment at the respective interface were studied. We find a "cliff"-like conduction band offset at the CdS/CZTS interface independent of absorber pretreatment and a significant etch-induced enhancement of the energetic barrier for charge carrier recombination across the CdS/CZTS interface.}, language = {en} } @misc{BaerSchubertMarsenetal., author = {B{\"a}r, Marcus and Schubert, Bj{\"o}rn-Arvid and Marsen, Bj{\"o}rn and Krause, Stefan and Pookpanratana, Sujitra and Unold, Thomas and Weinhardt, Lothar and Heske, Clemens and Schock, Hans-Werner}, title = {Impact of KCN etching on the chemical and electronic surface structure of Cu2ZnSnS4 thin-film solar cell absorbers}, abstract = {The chemical and electronic surface structure of Cu2ZnSnS4 thin-film solar cell absorbers has been investigated by direct and inverse photoemission. Particular emphasis was placed on the impact of KCN etching, which significantly alters the surface composition and is best explained by a preferred etching of Cu and, to a lesser degree, Sn. As a consequence the surface band gap increased from (1.53 +/- 0.15) eV, which agrees with optically derived bulk band gap values, to (1.91 +/- 0.15) ev.}, language = {en} } @misc{BaerKlaerWeinhardtetal., author = {B{\"a}r, Marcus and Klaer, Joachim and Weinhardt, Lothar and Wilks, Regan G. and Krause, Stefan and Blum, Monika and Yang, Wan Li and Heske, Clemens and Schock, Hans-Werner}, title = {Cu 2-x S Surface Phases and Their Impact on the Electronic Structure of CuInS 2 Thin Films - A Hidden Parameter in Solar Cell Optimization}, series = {Advanced Energy Materials}, volume = {3}, journal = {Advanced Energy Materials}, number = {6}, issn = {1614-6840}, pages = {777 -- 781}, abstract = {The surface properties of CuInS 2 (CIS) thin-fi lm solar cell absorbers are investigated by a combination of electron and soft X-ray spectroscopies. Spatially separated regions of varying colors are observed and identifi ed to be dominated by either CuS or Cu 2 S surface phases. After their removal by KCN etching, the samples cannot be distinguished by eye and the CIS surface is found to be Cu-defi cient in both regions. However, a signifi cantly more pronounced off-stoichiometry in the region initially covered by Cu 2 S can be identifi ed. In this region, the resulting surface band gap is also signifi cantly larger than the E g Surf of the initially CuS-terminated region. Such variations may represent a hidden parameter which, if overlooked, induces irreproducibility and thus prevents systematic optimization efforts.}, language = {en} } @misc{HandickReinhardAlsmeieretal., author = {Handick, Evelyn and Reinhard, Patrick and Alsmeier, Jan Hendrik and K{\"o}hler, Leonard and Pianezzi, Fabian and Krause, Stefan and Gorgoi, Mihaela and Ikenaga, Eiji and Koch, Norbert and Wilks, Regan G. and B{\"u}cheler, Stephan and Tiwari, Ayodhya N. and B{\"a}hr, Marcus}, title = {Potassium postdeposition treatment-induced band gap widening at Cu(In,Ga)Se₂ surfaces - Reason for performance leap?}, series = {ACS Applied Materials \& Interfaces}, volume = {7}, journal = {ACS Applied Materials \& Interfaces}, number = {49}, issn = {1944-8244}, doi = {10.1021/acsami.5b09231}, pages = {27414 -- 27420}, language = {en} } @misc{BlaenKurzDrummondetal., author = {Blaen, Phillip J. and Kurz, Marie Juliette and Drummond, Jennifer D. and Knapp, Julia L. A. and Mendoza-Lera, Clara and Schmadel, Noah M. and Klaar, Megan and J{\"a}ger, Anna and Folegot, Silvia and Lee-Cullin, Joseph and Ward, Adam and Zarnetske, Jay and Datry, Thibault and Milner, Alexander and Lewandowski, J{\"o}rg and Hannah, David M. and Krause, Stefan}, title = {Woody debris is related to reach-scale hotspots of lowland stream ecosystem respiration under baseflow conditions}, series = {Ecohydrology : ecosystems, land and water process interactions, ecohydrogeomorphology}, journal = {Ecohydrology : ecosystems, land and water process interactions, ecohydrogeomorphology}, issn = {1936-0592}, doi = {10.1002/eco.1952}, pages = {23}, language = {en} } @misc{KelleherWardKnappetal., author = {Kelleher, Christa and Ward, Adam Scott and Knapp, Julia L. A. and Blaen, Phillip J. and Kurz, Marie Juliette and Drummond, Jennifer D. and Zarnetske, Jay and Hannah, David M. and Mendoza-Lera, Clara and Schmadel, Noah M. and Datry, Thibault and Lewandowski, J{\"o}rg and Krause, Stefan}, title = {Exploring Tracer Information and Model Framework Trade-offs to Improve Estimation of Stream Transient Storage Processes}, series = {Water Resources Research}, volume = {55}, journal = {Water Resources Research}, number = {4}, issn = {0043-1397}, doi = {10.1029/2018WR023585}, pages = {3481 -- 3501}, language = {en} } @misc{LopensSchierackKrauseetal., author = {Lopens, Steffi and Schierack, Peter and Krause, Jenny and Piaszczyński, Michał and Kr{\´o}l, Robert and Staroń, Robert and Krupa, Łukasz and Gutkowski, Krzysztof and Kruk, Beata and Grąt, Michał and Krawczyk, Marek and Patkowski, Waldemar and Glaser, Fabian and R{\"o}diger, Stefan and Grossmann, Kai and Pająk, Jacek and Milkiewicz, Piotr and Lammert, Frank and Zieniewicz, Krzysztof and Schramm, Christoph and Roggenbuck, Dirk and Krawczyk, Marcin}, title = {Antimicrobial glycoprotein 2 (GP2) in gallstones, bile fluid and peribiliary glands of patients with primary sclerosing cholangitis}, series = {Clinica Chimica Acta}, volume = {562}, journal = {Clinica Chimica Acta}, publisher = {Elsevier BV}, issn = {0009-8981}, doi = {10.1016/j.cca.2024.119841}, pages = {1 -- 8}, language = {en} }