Reference : Vapour phase alkali species for Cu(In,Ga)Se2 solar cells |
Scientific congresses, symposiums and conference proceedings : Unpublished conference | |||
Physical, chemical, mathematical & earth Sciences : Multidisciplinary, general & others | |||
http://hdl.handle.net/10993/24659 | |||
Vapour phase alkali species for Cu(In,Ga)Se2 solar cells | |
English | |
Berner, Ulrich [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit] | |
Colombara, Diego ![]() | |
Bertram, Tobias ![]() | |
Malaquias, Joao Corujo Branco ![]() | |
Meadows, Helen ![]() | |
Valle, Nathalie [Luxembourg Institute of Science & Technology - LIST] | |
Widenmeyer, Markus [Bosch] | |
Dale, Phillip ![]() | |
Sep-2015 | |
https://www.photovoltaic-conference.com/images/stories/2015/2_conference/programme/EUPVSEC2015_10-09-2015_Programme.pdf | |
Yes | |
31st European Photovoltaic Solar Energy and Conversion | |
14th to 19th September 2015 | |
Hamburg | |
Germany | |
[en] Alkali vapor ; Cu(In,Ga)Se2 ; thin film solar cells ; Na K ; photovoltaics | |
[en] Alkalis are essential in Cu(In,Ga)Se2 absorber layers for efficient solar cells. Current doping
methods rely on solid state diffusion of an alkali through to the absorber layer, e.g. a thin NaF layer on Mo or NaCl dissolved in a metal precursor ink[1]. The apparent concentration of alkali in the final absorber is determined by the initial alkali dosing and the use of an interfacial barrier to stop alkali diffusion from the substrate. Until now the vapor–absorber interface as a source or sink of alkali doping has been largely ignored. We show that device efficiency improves from 2 to 8% by gas phase Na adsorption alone. Conversely initial results show that Na can also be desorbed to the gas phase. Although these efficiencies are lower than those obtained by including Na directly in the precursor (device efficiency 13.3% [1]), the findings are relevant to all chalcogenide growers as they show that exact doping, and thus control of device efficiency, is only possible when gas phase adsorption/desorption processes are controlled. | |
Researchers | |
http://hdl.handle.net/10993/24659 | |
FP7 ; 284486 - SCALENANO - Development and scale-up of nanostructured based materials and processes for low cost high efficiency chalcogenide based photovoltaics | |
FnR ; FNR3931997 > Phillip Dale > LASER > Laser Annealing of Semiconductor Electrodeposited Reactants > 15/10/2010 > 14/10/2013 > 2010 |
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