SwePub
Sök i LIBRIS databas

  Utökad sökning

WFRF:(Leitao M)
 

Sökning: WFRF:(Leitao M) > (2010-2014) > Cu2ZnSnS4 absorber ...

Cu2ZnSnS4 absorber layers obtained through sulphurization of metallic precursors : Graphite box versus sulphur flux

Sousa, M. G. (författare)
da Cunha, A. F. (författare)
Salome, Pedro M. P. (författare)
Uppsala universitet,Fasta tillståndets elektronik,Ångstrom Solar Ctr,
visa fler...
Fernandes, P. A. (författare)
Teixeira, J. P. (författare)
Leitao, J. P. (författare)
visa färre...
 (creator_code:org_t)
Elsevier BV, 2013
2013
Engelska.
Ingår i: Thin Solid Films. - : Elsevier BV. - 0040-6090 .- 1879-2731. ; 535, s. 27-30
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • In this work we employed a hybrid method, combining RF-magnetron sputtering with evaporation, for the deposition of tailor made metallic precursors, with varying number of Zn/Sn/Cu (ZTC) periods and compared two approaches to sulphurization. Two series of samples with 1x, 2x and 4x ZTC periods have been prepared. One series of precursors was sulphurized in a tubular furnace directly exposed to a sulphur vapour and N-2 + 5% H-2 flux at a pressure of 5.0 x 10(+4) Pa. A second series of identical precursors was sulphurized in the same furnace but inside a graphite box where sulphur pellets have been evaporated again in the presence of N-2 + 5% H-2 and at the same pressure as for the sulphur flux experiments. The morphological and chemical analyses revealed a small grain structure but good average composition for all three films sulphurized in the graphite box. As for the three films sulphurized in sulphur flux grain growth was seen with the increase of the number of ZTC periods whilst, in terms of composition, they were slightly Zn poor. The films' crystal structure showed that Cu2ZnSnS4 is the dominant phase. However, in the case of the sulphur flux films SnS2 was also detected. Photoluminescence spectroscopy studies showed an asymmetric broad band emission which occurs in the range of 1-1.5 eV. Clearly the radiative recombination efficiency is higher in the series of samples sulphurized in sulphur flux. We have found that sulphurization in sulphur flux leads to better film morphology than when the process is carried out in a graphite box in similar thermodynamic conditions. Solar cells have been prepared and characterized showing a correlation between improved film morphology and cell performance. The best cells achieved an efficiency of 2.4%.

Nyckelord

Cu2ZnSnS4
Thin films
Sulphurization
Graphite box
Sulphur flux
Engineering Science with specialization in Electronics
Teknisk fysik med inriktning mot elektronik

Publikations- och innehållstyp

ref (ämneskategori)
art (ämneskategori)

Hitta via bibliotek

Till lärosätets databas

Sök utanför SwePub

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy