Photovoltaics. Lecture 7. CIGS.

From previous lecture: Amorphous Si .

Cu(Inx,Ga1-x)Se2 (CIGS): .

Wide energy sensitivity.

1 E (x)[eV] = 1,02 +0,67x + 0,11x(x-1) K. Miyazaki et al., “High sensitivity and wide bandwidth Image Sensor using CuIn1-xGaxSe2 thin films”

Thin Solid Films

In Press, Accepted Manuscript Universität Karlsruhe (TH)

Photovoltaics. Lecture 7. CIGS.

Image sensor: spectral sensitivity 2 K. Miyazaki et al., “High sensitivity and wide bandwidth Image Sensor using CuIn1-xGaxSe2 thin films”

Thin Solid Films

In Press, Accepted Manuscript Universität Karlsruhe (TH)

Photovoltaics. Lecture 7. CIGS.

3

The dashed lines show a case, where the activation energy of a defect state at the CdS/Cu(In,Ga)(S,Se)2 interface is increased due to changes at the interface

Carsten Deibel, Dr. Jürgen Parisi, and Dr. Vladimir Dyakonov, “Defect Spectroscopy on Cu(In,Ga)(S,Se)2-Based Heterojunction Solar Cells: Role of the Damp-Heat Treatment” Universität Karlsruhe (TH)

Photovoltaics. Lecture 7. CIGS.

Growth: 4 Georg Voorwinden, Robert Kniese, and Michael Powalla, “In-line Cu(In,Ga)Se2 co-evaporation processes with graded band gaps on large substrates,” Thin Solid Films 431-432 (May 1, 2003) Universität Karlsruhe (TH)

Photovoltaics. Lecture 7. CIGS.

Growth: Real live 5 Universität Karlsruhe (TH) ZSW, Stuttgart

Photovoltaics. Lecture 7. CIGS.

Grains:

Polycrystalline Cu(In,Ga)Se2 (CIGS)-based device is now approaching 20%, significantly surpassing the best corresponding single-crystal devices (13%)

Yanfa Yan et al., Physica B: Condensed Matter 401-402 (December 15, 2007) Powalla et al.,

Thin Solid Films

In Press, Accepted Manuscript T. Eisenbarth et al., Thin Solid Films In Press, Accepted Manuscript Universität Karlsruhe (TH) 6

Photovoltaics. Lecture 7. CIGS.

Grains: 7 Markus Gloeckler, James R. Sites, and Wyatt K. Metzger, “Grain-boundary recombination in Cu(In,Ga)Se2 solar cells,” Journal of Applied Physics 98, no. 11 (December 1, 2005) Universität Karlsruhe (TH)

Photovoltaics. Lecture 7. CIGS.

Grains: 8 C. S. Jiang et al., “Local built-in potential on grain boundary of Cu(In,Ga)Se[sub 2] thin films,” Applied Physics Letters 84, no. 18 (May 3, 2004) Universität Karlsruhe (TH)

Photovoltaics. Lecture 7. CIGS.

Alternative fabrication and progress: 9 Universität Karlsruhe (TH)

Photovoltaics. Lecture 7. CIGS.

Thank you: SRG group lieder, Dr. Anatoliy Slobodskyy - Universität Karlsruhe Lichttechnisches Institut (LTI) Kaiserstraße 12 76131 Karlsruhe Deutschland Tel 0721 608 3981 Fax 0721 608 2590 E-mail: [email protected] karlsruhe.de

Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden Württemberg Industriestr. 6 70565 Stuttgart Deutschland 10 Universität Karlsruhe (TH)