Engineer Control

GREGORY M. HANKET

Institute of Energy Conversion

University of Delaware

Newark, DE 19716-3820

Tel: 302-***-****

Fax: 302-***-****

E-mail: ******@****.***

EDUCATION

Ph.D. University of Delaware, 1999

Thesis title: Manufacture of Large-Area Copper Indium (Gallium) Diselenide

Thin Films for Photovoltaic Applications

B.S. Case Western Reserve University, 1994

EXPERIENCE

2006 Present Research Associate III

Institute of Energy Conversion, University of Delaware

Newark, Delaware 19716

Describe

2004 2006 Limited Term Researcher

Institute of Energy Conversion, University of Delaware

Newark, Delaware 19716

Investigated kinetics of atmospheric-pressure selenization/sulfization of

Cu-Ga-In precursors. Investigated Cu(InGa)Se2 photovoltaic devices on

poly-p-phenylenebenzobisoxazole (PBO) film substrates (NASA/AF

SBIRs in collaboration with Foster-Miller). Designed a high-rate

Knudsen-type thermal evaporation source with improved performance

characteristics over the former IEC design:

60-70% reduction in run-to-run variability of Cu effusion rate

100 C reduction in operating temperature for equivalent Cu effusion rate.

2002 2003 Sensortex, Inc., R & D Engineer

Investigated various space thermal control coatings/membranes for a

variable-emissivity thermal management device for NASA ST-5 satellites.

Performed thermal modeling and development of ground and in-flight

testing protocols for evaluation of device performance. Electrodeposited

soft magnetic permalloy (Ni 80% Fe 20%) films for a novel

magnetoelastic wire strain sensing element. Investigated low-profile load

cells utilizing a magnetoelastic wire strain element which were awarded a

Phase II SBIR.

1999 2002 Limited Term Researcher

Institute of Energy Conversion, University of Delaware

Newark, Delaware 19716

Cu(InGa)Se2

Developed a roll-to-roll, high-vacuum thermal evaporation process

depositing uniform (> 9% small-area device efficiency sampled over 6 x

5 area) Cu(InGa)Se2 thin films on a polyimide web and supported

commercialization by an outside venture. Analyzed sputtered Mo thin

films on polyimide used in roll-to-roll Cu(InGa)Se2 deposition, including

film stress/strain modeling, and strain measurement by x-ray diffraction

(XRD). Developed a high performance effusion nozzle design (U.S. Patent

#6,562,405) to achieve effusion rates in excess of 15 g/hr/nozzle, and

characterized flux distribution profiles, and effusion rate variations caused

by thermal non-uniformities in a 2-nozzle source. Integrated in-situ atomic

absorption sensors (ATOMICAS system by Luxtron, Inc.) into inline

Cu(InGa)Se2 deposition system for real-time feedback control of effusion

rates.

CdTe

Developed a novel, scalable, moderate-pressure (10-100 torr), high-

throughput, in-line vapor transport process (U.S Patent #6,676,994) to

deposit CdTe thin films using a carrier gas, which has produced

photovoltaic devices > 13% efficiency on 4 wide substrates. Performed a

non-ideal thermodynamic analysis of CdS/CdTe diffusion couples and

published excess free energies and enthalpies of mixing.

1994 Process Development Intern, Diversey Corporation, Detroit, MI.

Managed powder blending / pressing pilot process including supervision

of operators.

1992 1994 CWRU, Department of Chemical Engineering

Thin film diamond chemical vapor deposition (CVD) processes.

PATENTS (all commercially licensed)

U.S. Patent #6,982,005, Multiple-nozzle thermal evaporation source

U.S. Patent #6,676,994, Method for producing thin films

U.S. Patent #6,562,405, Multiple-nozzle thermal evaporation source

U.S. Patent #6,372,538, Fabrication of thin-film, flexible photovoltaic module

U.S. Patent #6,310,281, Thin-film, flexible photovoltaic module

Gregory M. Hanket

PUBLICATION LIST

1. "Vapor Phase Treatment of CdTe/CdS Thin Films with CdCl2:O2," B.E.

McCandless, H. Hichri, G. Hanket, and R.W. Birkmire, Proc. 25th IEEE PVSC,

781 (1996).

2. "Deposition of Cu(InGa)Se2 by Inline Evaporation," G.M. Hanket, P.D. Paulson,

W.N. Shafarman, and R.W. Birkmire, Proc. NCPV Prog. Rev. Mtg., 241 (2000).

3. Fabrication of Graded Cu(InGa)Se2 Films by Inline Evaporation," G.M. Hanket,

P.D. Paulson, U. Singh, S.T. Junker, R.W. Birkmire, F.J. Doyle III, E. Eser and

W.N. Shafarman, Proc. 28th IEEE PVSC, 499 (2000).

4. Phase Behavior in the CdTe-CdS Pseudobinary System, Brian E. McCandless,

Gregory M. Hanket, D. Garth Jensen, and Robert W. Birkmire, J. Vac. Soc.

Technol. A. 20(4), 1462 (2002).

5. Vapor Transport Deposition of Cadmium Telluride Films, Brian E.

McCandless, Robert W. Birkmire, Wayne A. Buchanan, Shannon Fields, Gregory

M. Hanket, Proc. 29th IEEE PVSC, 547 (2002).

6. Pilot-scale Manufacture of Cu(InGa)Se2 Films on a Flexible Polymer Substrate,

Gregory M. Hanket, Udai P. Singh, Erten Eser, William N. Shafarman, and

Robert W. Birkmire, Proc. 29th IEEE PVSC, 567 (2002).

7. Advances in CuInSe2-based Solar Cells: From Fundamentals to Processing, W.

Shafarman, J. Titus, M. Haimbodi, M. Gossla, G. Hanket, S. Marsillac, T.

Minemoto, P. Paulson, B. Sang, U. Singh, E. Eser, R. Birkmire, Proc. NCPV

Prog. Rev. Mtg., 525 (2003).

8. Processing Improvements for Roll-to-Roll Deposition of Cu(InGa)Se2, E. Eser,

S. Fields, G. Hanket, R.W. Birkmire, W. Shafarman, Prog. Rev 32, (2004).

9. Critical Issues in Vapor Deposition of Cu(InGa)Se2 on Polymer Web: Source

Spitting and Back Contact Cracking, Erten Eser, Shannon Fields, Gregory

Hanket, Robert W. Birkmire, Jeffrey Doody, Proc. 31st IEEE PVSC, 515 (2005).

10. Thin Film Cadmium Zinc Telluride Solar Cells, Brian E. McCandless, Wayne

A. Buchanan and Gregory M. Hanket, Proc.32nd IEEE PVSC and WCPEC-4, 483

(2006).

11. Composition Control in the Growth of Cu(InGa)(SeS)2 by the Reaction of Cu-In-

Ga Precursors in H2Se and H2S, Gregory M. Hanket, William N. Shafarman,

Robert W. Birkmire, Proc. 32nd IEEE PVSC and WCPEC-4, 560 (2006).

12. Design of a Vapor Transport Deposition Process for Thin Film Materials, G.M.

Hanket, B.E. McCandless, W.A. Buchanan, S. Fields, and R.W. Birkmire, J. Vac.

Sci. and Technol. A, 24(5), 1695 (2006).

13. Composition Control in the Deposition of Cu(InGa)(SeS)2 Thin Films, William

Shafarman, Gregory Hanket, and Shiro Nishiwaki, Mater. Res. Soc. Symp. Proc.

1012, 1012-Y02-01, (2007).

14. Incongruent Reaction of Cu-(InGa) Intermetallic Precursors in H2Se and H2S,

G.M. Hanket, W.N. Shafarman, B.E. McCandless and R.W. Birkmire, J. Appl.

Phys. 102, 074823 (2007). URL: http://link.aip.org/link/?JAP/102/074922

15. Effect of Reaction Temperature on Cu(InGa)(SeS)2 Formation by Sequential

H2Se/H2S Precursor Reaction Processes, Gregory Hanket, Rui Kamada, William

Shafarman, Woo Kyoung Kim, Proc. 33rd IEEE PVSC, (2008).

16. Control of Composition in Co-evaporated Cu(InGa)(SeS)2 Thin Films, Shiro

Nishiwaki, Greg Hanket, Robert Birkmire and William Shafarman, Proc. 33rd

IEEE PVSC, (2008).

17. Characterization and Device Performance of (AgCu)(InGa)Se2 Absorber

Layers, Gregory M. Hanket, Jonathan H. Boyle, and William N. Shafarman,

Proc. 34th IEEE PVSC, Philadelphia, PA, June 8-12, 2009.

18. Ga Distribution and Adhesion Issues in Selenization of Metallic Cu-Ga-In

Precurcors, Woo Kyoung Kim, Gregory M. Hanket and William N. Shafarman,

Proc. 34th IEEE PVSC, Philadelphia, PA, June 8-12, 2009.

19. Optical and Quantum Efficiency Analysis of (Ag,Cu)(In,Ga)Se2 Absorber

Layers, Jonathan Boyle, Gregory Hanket and William Shafarman, Proc. 34th

IEEE PVSC, Philadelphia, PA, June 8-12, 2009.

20. Roll-to-Roll Deposition of a Semiconductor Film on a Flexible Substrate for

Photovoltaics: Conception to Reality, Gregory M. Hanket, Robert W. Birkmire,

Scott C. Jackson and Richard E. Rocheleau, Ind. Eng. Chem. Res. 48, 5923-5933

(2009).

21. Characterizing the Effects of Silver Alloying in Chalcopyrite CIGS Solar Cells

with Junction Capacitance Methods, Peter T. Erslev, Gregory M. Hanket,

William N. Shafarman, and J. David Cohen, Mater. Res. Soc. Symp. 1165, 1165-

M01-07 (2009).

22. Device Characterization of (AgCu)(InGa)Se2 Solar Cells, William Shafarman,

Christopher Thompson, Jonathan Boyle, Gregory Hanket, Peter Erslev and J.

David Cohen, Proc. 35th IEEE PVSC, Waikiki, Hawaii, June 21-25, 2010.

23. Commercial-Scale Sources for the Evaporation of Elemental Cu, Ga, and In:

Modeling, Design and Validation, Gregory M. Hanket, Robert W. Birkmire,

Shannon Fields, and Erten Eser, Proc. 35th IEEE PVSC, Waikiki, Hawaii, June

21-25, 2010.

24. Wide-bandgap (AgCu)(InGa)Se2 Absorber Layers Deposited by Three-stage Co-

evaporation, Gregory Hanket, Jonathan H. Boyle, William N. Shafarman, and

Glenn Teeter, Proc. 35th IEEE PVSC, Waikiki, Hawaii, June 21-25, 2010.

25. Commercial-Scale Deposition of Cu(InGa)Se2 Thin Films by Thermal

Evaporation, Gregory M. Hanket, Future Photovoltaics, Sept. (2010).

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