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Laboratory of Ternary Semiconductors


Properties of AIBIIICVI2 semiconductors
and solar cells based on CuInSe2 and related materials

Staff

dr in┐. Pawe│  Zabierowski, tel.: 234 8675, pok.708, zabier(na)if.pw.edu.pl - head
prof. dr hab. Rajmund Bacewicz, tel.: 234 8227, pok.325, bacewicz
(na)if.pw.edu.pl
prof. dr hab.Ma│gorzata Igalson, tel.:234 8214, pok.322, igalson(na)if.pw.edu.pl

mgr in┐. Andrzej Kubiaczyk, tel.: 234 8231, pok.326, kuba(na)mech.pw.edu.pl
dr in┐. Marek Maciaszek, tel.: 234 8231, pok.326, maciaszek(na)if.pw.edu.pl
dr in┐. Marek Paw│owski, tel.: 234 5838, pok. 4 GF, marpawlo(na)if.pw.edu.pl
dr in┐. Anna Pietnoczka, tel.:234 8231, pok.326, apietnoczka(na)if.pw.edu.pl
dr Jan Ulaczyk, tel.: 234 8675, pok.315, jasiek(na)if.pw.edu.pl
dr in┐. Aleksander Urbaniak, tel.: 234 8214, pok. 322, aleksander.urbaniak(na)if.pw.edu.pl

Doktoranci:
Marek Maciaszek, mgr. in┐., tel.: 234 8231, pok. 326, maciaszek(na)if.pw.edu.pl
Karolina Macielak, mgr in┐., tel.: 234 8675, pok. 315, kmacielak(na)if.pw.edu.pl

STRUCTURES

Cu(In,Ga)(S,Se)2 - based thin film solar cells
Research focused on defect physics in photovoltaic materials and structures:
  • Eelectronic parameters of defects in absorber
  • Influence of defects on photovoltaic performance of solar cells.

EXPERIMENTAL TECHNIQUES

  • Current-voltage I-V and capacitance-voltage C-V characteristics
  • Deep level transient spectroscopy DLTS and its variations (reverse-bias DLTS, optical DLTS, Laplace-DLTS)
  • Admittance spectroscopy
  • Photoresponse, photocapacitance
  • Photoluminescence and electroluminescence
  • Photocurrent defect spectroscopy: modulated photocurrent spectroscopy MPC, photoinduced transient current spectroscopy PITS

RECENT RESULTS

  • Experimental evidence for defect relaxation in light and voltage bias-induced metastabilities in Cu(In,Ga)Se2
  • A model linking photovoltaic performance with distribution of negative-U defects in the absorber of CIGS solar cells
  • Database of intrinsic point defects electronic parameters in CuInSe2 and CuGaSe2 confirmed by photocurrent and capacitance spectroscopy

MATERIALS

  • Spintronic materials: binary and ternary diluted magnetic semiconductors (DMS) - (Ga,Mn)As and (Ga,Mn)N, bulk crystals and thin films.
Investigation of DMS materials is concentrated on studying of the site occupation and local order around Mn atoms in DMS by use of an analysis of the X-ray absorption fine structure.
  • Photovoltaic materials: CuInSe2 and related semiconductors as well as their solid solutions studied as reference materials for thin film PV devices (photoluminescence and Raman spectroscopy)
  • Materials for photovoltaic applications from the chalcopyrite family -  Cu(In,Ga)Se2;and kesterites – Cu2ZnSn(S,Se)4
EXPERIMENTAL TECHNIQUES
  • Photoluminescence
  • Raman spectroscopy
  • X-ray absorption (XANES and EXAFS)

RECENT RESULTS

  • Local order around substitutional Mn in GaN:Mn layers was determined.
  • Interstitial Mn has been found in GaAs:Mn from EXAFS measurements.
  • Site preference and local lattice distortion was found for Mn in CuInS2.
  • Mn cationic substitution has been confirmed for ZnGeP2 and bond lengths have been determined.
  • Local structure in Cu2ZnSnS4 by the XAFS method was determined

COLLABORATION

  • HASYLAB-DESY, Hamburg
  • Instytut Fizyki PAN
  • Helmholtz Zentrum Berlin fŘr Materialien und Energie
  • Angstrom Solar Center, Uppsala University
  • UniversitÚ de Nantes, Francja
  • UniversitÚ de Luxembourg
  • Aalto University, Helsinki
  • EMPA Dubendorf, ETH-Bereich, Szwajcaria
  • Zentrum fŘr Sonnenenergie- und Wasserstoff-Forschung Baden-WŘrttemberg (ZSW) Stuttgart

INTERNATIONAL PROJECTS

2012-2014
FP7 MNT-MATERA ERA NET “Controlled Selenium Pressure Targeting - CONSEPT”

2010-2011
POLONIUM “Metastabilities in Cu(In,Ga)Se2-based solar cells and modules – METACIS”

2011-2014
FP7 Marie Curie Actions IRSES “Development of a new generation of CIGS-based solar cells – NanoCIS”

2010-2012
FP7 CP “New concepts for high efficiency and low cost in-line manufactured
flexible CIGS solar cells – hipoCIGS”

2008-2011
FP 7 ERA NET-MATERA „Defects in chalcopyrites, advanced characterization – DECK”