Richard Ahrenkiel

Moseley, J., Metzger, W. K., Moutinho, H. R., Paudel, N., Guthrey, H. L., Yan, Y., Ahrenkiel, R. K. & Al-Jassim, M. M., 14 Jul 2015, In: Journal of Applied Physics. 118, 2, 9 p., 025702.

Research output: Contribution to journal › Article › peer-review

76 Scopus Citations

2014

Cathodoluminescence Analysis of Grain Boundaries and Grain Interiors in Thin-Film CdTe

Moseley, J., Al-Jassim, M. M., Kuciauskas, D., Moutinho, H. R., Paudel, N., Guthrey, H. L., Yan, Y., Metzger, W. K. & Ahrenkiel, R. K., 2014, In: IEEE Journal of Photovoltaics. 4, 6, p. 1671-1679 9 p., 6918363.

Research output: Contribution to journal › Article › peer-review

26 Scopus Citations

Dual-Sensor Technique for Characterization of Carrier Lifetime Decay Transients in Semiconductors

Ahrenkiel, R., Johnston, S., Kuciauskas, D. & Tynan, G., 7 Dec 2014, In: Journal of Applied Physics. 116, 21, 7 p., Article No. 214510.

Research output: Contribution to journal › Article › peer-review

Open Access

10 Scopus Citations

Simultaneous Measurement of Minority-Carrier Lifetime in Single-Crystal CdTe Using Three Transient Decay Techniques

Johnston, S., Ahrenkiel, R., Kuciauskas, D., Albin, D., Metzger, W. & Zaunbrecher, K., Sep 2014, In: IEEE Journal of Photovoltaics. 4, 5, p. 1295-1300 6 p., 6870430.

Research output: Contribution to journal › Article › peer-review

27 Scopus Citations

2013

Degradation of Photovoltaic Devices at High Concentration by Space Charge Limited Currents

Feldman, A., Ahrenkiel, R. & Lehman, J., 2013, In: Solar Energy Materials and Solar Cells. 117, p. 408-411 4 p.

Research output: Contribution to journal › Article › peer-review

4 Scopus Citations

Electron Transfer in Hydrogenated Nanocrystalline Silicon Observed by Time-Resolved Terahertz Spectroscopy

Bergren, M. R., Simonds, B. J., Yan, B., Yue, G., Ahrenkiel, R., Furtak, T. E., Collins, R. T., Taylor, P. C. & Beard, M. C., 4 Feb 2013, In: Physical Review B - Condensed Matter and Materials Physics. 87, 8, 5 p., 081301.

Research output: Contribution to journal › Article › peer-review

20 Scopus Citations

Explanation of Red Spectral Shifts at CdTe Grain Boundaries

Moseley, J., Al-Jassim, M. M., Moutinho, H. R., Guthrey, H. L., Metzger, W. K. & Ahrenkiel, R. K., 2 Dec 2013, In: Applied Physics Letters. 103, 23, 4 p., Article No. 233103.

Research output: Contribution to journal › Article › peer-review

15 Scopus Citations

Minority Carrier Lifetime Analysis in the Bulk of Thin-Film Absorbers Using Subbandgap (Two-Photon) Excitation

Kuciauskas, D., Kanevce, A., Burst, J. M., Duenow, J. N., Dhere, R., Albin, D. S., Levi, D. H. & Ahrenkiel, R. K., 2013, In: IEEE Journal of Photovoltaics. 3, 4, p. 1319-1324 6 p., 6553424.

Research output: Contribution to journal › Article › peer-review

Open Access

93 Scopus Citations

Novel Free-Carrier Pump-Probe Analysis of Carrier Transport in Semiconductors

Ahrenkiel, R. K., Feldman, A., Lehman, J. & Johnston, S. W., 2013, In: IEEE Journal of Photovoltaics. 3, 1, p. 348-352 5 p., 6304900.

Research output: Contribution to journal › Article › peer-review

5 Scopus Citations

Resonant Coupling for Contactless Measurement of Carrier Lifetime: Article No. 04D113

Ahrenkiel, R., 2013, In: Journal of Vacuum Science and Technology B: Nanotechnology and Microelectronics. 31, 4, 8 p.

Research output: Contribution to journal › Article › peer-review

Resonant Coupling for Contactless Measurement of Carrier Lifetime

Ahrenkiel, R. K. & Johnston, S. W., 2013, p. 1389-1393. 5 p.

Research output: Contribution to conference › Paper › peer-review

1 Scopus Citations

Structural, Chemical and Luminescent Investigation of MBE- and CSS-Deposited CdTe Thin-Films for Solar Cells

Moseley, J., Moutinho, H., Romero, M., Jones, K., Yan, Y., Al-Jassim, M. & Ahrenkiel, R., 2013, p. 2003-2006. 4 p.

Research output: Contribution to conference › Paper › peer-review

1 Scopus Citations

2010

Comparison of Techniques for Measuring Carrier Lifetime in Thin-Film and Multicrystalline Photovoltaic Materials

Ahrenkiel, R. K., Call, N., Johnston, S. W. & Metzger, W. K., 2010, In: Solar Energy Materials and Solar Cells. 94, 12, p. 2197-2204 8 p.

Research output: Contribution to journal › Article › peer-review

38 Scopus Citations

Imaging Characterization Techniques Applied to Cu(In,Ga)Se2 Solar Cells

Johnston, S., Unold, T., Repins, I., Sundaramoorthy, R., Jones, K. M., To, B., Call, N. & Ahrenkiel, R., Jul 2010, p. 665-670. 6 p.

Research output: Contribution to conference › Paper › peer-review

33 Scopus Citations

2009

An Optical Technique for Measuring Surface Recombination Velocity

Ahrenkiel, R. K. & Johnston, S. W., May 2009, In: Solar Energy Materials and Solar Cells. 93, 5, p. 645-649 5 p.

Research output: Contribution to journal › Article › peer-review

36 Scopus Citations

Applications of Imaging Techniques for Solar Cell Characterization

Johnston, S. W., Call, N. J., Phan, B. & Ahrenkiel, R. K., 2009, p. 276-281. 6 p.

Research output: Contribution to conference › Paper › peer-review

7 Scopus Citations

Imaging of Shunts and Junction Breakdown in Multicrystalline Silicon Solar Cells

Call, N. J., Johnston, S. W., Ahrenkiel, R. K., Romero, M. J. & Yang, B., 2009, p. 1184-1189. 6 p.

Research output: Contribution to conference › Paper › peer-review

2008

Interaction of Microwaves with Photoelectrons in Semiconductors

Ahrenkiel, R. K. & Johnston, S. W., 2008, In: Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures. 26, 4, p. 1508-1515 8 p.

Research output: Contribution to journal › Article › peer-review

11 Scopus Citations

Lifetime Analysis of Silicon Solar Cells by Microwave Reflection

Ahrenkiel, R. K. & Johnston, S. W., 2008, In: Solar Energy Materials and Solar Cells. 92, 8, p. 830-835 6 p.

Research output: Contribution to journal › Article › peer-review

14 Scopus Citations

Photoconductive Analysis of Ion Implantation Damage and Annealing in Silicon Wafers

Ahrenkiel, R., 2008, In: Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films. 26, 4, p. 812-818 7 p.

Research output: Contribution to journal › Article › peer-review

1 Scopus Citations

Relationship of Band-Edge Luminescence to Recombination Lifetime in Silicon Wafers

Ahrenkiel, R. K., Johnston, S. W., Metzger, W. K. & Dippo, P., 2008, In: Journal of Electronic Materials. 37, 4, p. 396-402 7 p.

Research output: Contribution to journal › Article › peer-review

8 Scopus Citations

Spectroscopic Ellipsometry and Photoluminescence Measurements of as-Deposited and Annealed Silicon Rich Oxynitride Films

Kohli, S., Theil, J. A., McCurdy, P. R., Dippo, P. C., Ahrenkiel, R. K., Rithner, C. D. & Dorhout, P. K., 2008, In: Thin Solid Films. 516, 12, p. 4342-4350 9 p.

Research output: Contribution to journal › Article › peer-review

3 Scopus Citations

2007

Optimization of Buffer Layers for Lattice-Mismatched Epitaxy of GaxIn1-xAs/InAsyP1-y Double-Heterostructures on InP

Ahrenkiel, S. P., Wanlass, M. W., Carapella, J. J., Ahrenkiel, R. K., Johnston, S. W. & Gedvilas, L. M., 2007, In: Solar Energy Materials and Solar Cells. 91, 10, p. 908-918 11 p.

Research output: Contribution to journal › Article › peer-review

32 Scopus Citations

2006

Temperature-Dependent Dark Current Measurements in GaAsN Heterojunction Diodes

Luther, J. M., Johnston, S. W., Kurtz, S. R., Ahrenkiel, R. K. & Collins, R. T., 2006, In: Applied Physics Letters. 88, 26, 3 p., 263502.

Research output: Contribution to journal › Article › peer-review

6 Scopus Citations

2005

Analysis of Charge Separation Dynamics in a Semiconductor Junction

Metzger, W. K., Ahrenkiel, R. K., Dashdorj, J. & Friedman, D. J., Jan 2005, In: Physical Review B - Condensed Matter and Materials Physics. 71, 3, 9 p., Article No. 035301.

Research output: Contribution to journal › Article › peer-review

94 Scopus Citations

Chemical, Optical, Vibrational and Luminescent Properties of Hydrogenated Silicon-Rich Oxynitride Films

Kohli, S., Theil, J. A., Dippo, P. C., Ahrenkiel, R. K., Rithner, C. D. & Dorhout, P. K., 2005, In: Thin Solid Films. 473, 1, p. 89-97 9 p.

Research output: Contribution to journal › Article › peer-review

13 Scopus Citations

Electron Traps in p-Type GaAsN Characterized by Deep-Level Transient Spectroscopy

Johnston, S. W., Kurtz, S., Friedman, D. J., Ptak, A. J., Ahrenkiel, R. K. & Crandall, R. S., 2005, p. 599-602. 4 p.

Research output: Contribution to conference › Paper › peer-review

3 Scopus Citations

Evidence of Interface-Induced Persistent Photoconductivity in InP/In0.53Ga0.47As/InP Double Heterostructures Grown by Molecular-Beam Epitaxy

Hudait, M. K., Lin, Y., Goss, S. H., Smith, P., Bradley, S., Brillson, L. J., Johnston, S. W., Ahrenkiel, R. K. & Ringel, S. A., 18 Jul 2005, In: Applied Physics Letters. 87, 3, 3 p., 032106.

Research output: Contribution to journal › Article › peer-review

1 Scopus Citations

Lattice-Mismatched Approaches for High-Performance, III-V Photovoltaic Energy Converters

Wanlass, M. W., Ahrenkiel, S. P., Ahrenkiel, R. K., Albin, D. S., Carapella, J. J., Duda, A., Geisz, J. F., Kurtz, S., Moriarty, T., Wehrer, R. J. & Wernsman, B., 2005, p. 530-535. 6 p.

Research output: Contribution to conference › Paper › peer-review

72 Scopus Citations

Observed Trapping of Minority-Carrier Electrons in p-Type GaAsN During Deep-Level Transient Spectroscopy Measurement

Johnston, S. W., Kurtz, S. R., Friedman, D. J., Ptak, A. J., Ahrenkiel, R. K. & Crandall, R. S., 14 Feb 2005, In: Applied Physics Letters. 86, 7, p. 1-3 3 p., 072109.

Research output: Contribution to journal › Article › peer-review

27 Scopus Citations

Relationship of Recombination Lifetime to Dark Current In Silicon p-n Junctions

Ahrenkiel, R. K., Metzger, W. K., Page, M., Reedy, R., Luther, J. & Dashdorj, J., 2005, p. 895-898. 4 p.

Research output: Contribution to conference › Paper › peer-review

5 Scopus Citations

2004

Characterization Survey of GaxIn1-xAs/InAsyP1-y Double Heterostructures and InAsyP1-y Multilayers Grown on InP

Ahrenkiel, S. P., Wanlass, M. W., Carapella, J. J., Gedvilas, L. M., Keyes, B. M., Ahrenkiel, R. K. & Moutinho, H. R., 2004, In: Journal of Electronic Materials. 33, 3, p. 185-193 9 p.

Research output: Contribution to journal › Article › peer-review

20 Scopus Citations

Interface Recombination Velocity Measurement by a Contactless Microwave Technique

Ahrenkiel, R. K. & Dashdorj, J., 2004, In: Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures. 22, 4, p. 2063-2067 5 p.

Research output: Contribution to journal › Article › peer-review

18 Scopus Citations

Interface Recombination Velocity Measurement by a Contactless Microwave Technique

Ahrenkiel, R. K. & Dashdorj, J., 2004, p. 499-501. 3 p.

Research output: Contribution to conference › Paper › peer-review

1 Scopus Citations

MOCVD Growth and Properties of Zn3P2 and Cd3P2 Films for Thermal Photovoltaic Applications

Hermann, A. M., Madan, A., Wanlass, M. W., Badri, V., Ahrenkiel, R., Morrison, S. & Gonzalez, C., 1 May 2004, In: Solar Energy Materials and Solar Cells. 82, 1-2, p. 241-252 12 p.

Research output: Contribution to journal › Article › peer-review

29 Scopus Citations

Nanocrystal Formation in Annealed a-SiO0.17N0.07:H Films

Kohli, S., Theil, J. A., Dippo, P. C., Jones, K. M., Al-Jassim, M. M., Ahrenkiel, R. K., Rithner, C. D. & Dorhout, P. K., 2004, In: Nanotechnology. 15, 12, p. 1831-1836 6 p.

Research output: Contribution to journal › Article › peer-review

29 Scopus Citations

Observation of retarded recombination in charge-separation structures

Ahrenkiel, R. K., Friedman, D., Metzger, W. K., Page, M. & Dashdorj, J., 2004, p. 205-210. 6 p.

Research output: Contribution to conference › Paper › peer-review

2 Scopus Citations

2003

Advanced Technique for Measuring Minority-Carrier Parameters and Defect Properties of Semiconductors

Ahrenkiel, R. K. & Johnston, S. W., 15 Sep 2003, In: Materials Science and Engineering: B. 102, 1-3, p. 161-172 12 p.

Research output: Contribution to journal › Article › peer-review

35 Scopus Citations

Effects of Oxygen Contamination on Diffusion Length in p+--n GaInNAs Solar Cells

Balcioglu, A., Ahrenkiel, R. K. & Friedman, D. J., 2003, In: Journal of Applied Physics. 93, 6, p. 3635-3642 8 p.

Research output: Contribution to journal › Article › peer-review

9 Scopus Citations

Evolution of Electronic Properties of Cu(In,Ga)Se2 (CIGS)-Based Solar Cells During a 3-Stage Growth Process

AbuShama, J. A., Johnston, S., Ahrenkiel, R., Crandall, R., Young, D. & Noufi, R., 2003, p. 255-260. 6 p.

Research output: Contribution to conference › Paper › peer-review

2 Scopus Citations

Lattice-Matched and Metamorphic GaInP/GaInAs/Ge Concentrator Solar Cells

King, R. R., Fetzer, C. M., Colter, P. C., Edmondson, K. M., Law, D. C., Stavrides, A. P., Yoon, H., Kinsey, G. S., Cotal, H. L., Ermer, J. H., Sherif, R. A., Emery, K., Metzger, W., Ahrenkiel, R. K. & Karam, N. H., 2003, p. 622-625. 4 p.

Research output: Contribution to conference › Paper › peer-review

39 Scopus Citations

Measurement of Charge-Separation Potentials in GaAs1-xNx

Johnston, S. W., Ahrenkiel, R. K., Tu, C. W. & Hong, Y. G., Sep 2003, In: Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films. 21, 5, p. 1765-1769 5 p.

Research output: Contribution to journal › Article › peer-review

1 Scopus Citations

Modeling of Recombination Lifetimes in Charge-Separation Device Structures

Dashdorj, J., Ahrenkiel, R. & Metzger, W., 2003, p. 199-203. 5 p.

Research output: Contribution to conference › Paper › peer-review

2 Scopus Citations

Recombination Processes and Lifetime Measurements in Silicon Photovoltaics

Ahrenkiel, R. K., 2003, In: Solar Energy Materials and Solar Cells. 76, 3, p. 243-256 14 p.

Research output: Contribution to journal › Article › peer-review

14 Scopus Citations

Time-Resolved Photoluminescence Studies of CdTe Solar Cells

Metzger, W. K., Albin, D., Levi, D., Sheldon, P., Li, X., Keyes, B. M. & Ahrenkiel, R. K., 2003, In: Journal of Applied Physics. 94, 5, p. 3549-3555 7 p.

Research output: Contribution to journal › Article › peer-review

Open Access

173 Scopus Citations

Richard Ahrenkiel

Research Output

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