Zachary Holman

- Zachary.Holman@asu.edu
- (480) 965-9959
- ENGRC 175 TEMPE

Faculty, TEMPE Campus, Mailcode 5706

Biography

Zachary Holman is an Assistant Professor and an ASU Trustees Professor in the School of Electrical, Computer, and Energy Engineering at Arizona State University. He received his Ph.D. in Mechanical Engineering from the University of Minnesota for his work on plasma-synthesized silicon and germanium nanocrystals, after which he spent two years as a postdoctoral researcher developing high-efficiency silicon solar cells at EPFL in Switzerland. His research group at ASU focuses on new materials and device designs for high-efficiency silicon solar cells and silicon-based tandem solar cells. He is also the co-founder of an advanced materials start-up company, Swift Coat.

Education

- Ph.D. Mechanical Engineering, University of Minnesota, 2010
- B.A. Physics, Reed College, 2005

Research Website

Google Scholar

Research Interests

Zak's broad research interests span the fields of solar cells, coatings, nanotechnology, semiconductors, plasmas, and aerosols. Specific interests include silicon-based tandem solar cells, contacts to solar cells, light management in silicon solar cells, novel uses of nanoparticles in devices, semiconductor nanoparticles, optical and electronic properties of nanoscale materials, plasma synthesis of powders, and deposition of powders and thin films.

Publications

(Last two years, peer-reviewed journal articles)

49. P. Firth and Z. Holman, “Uniform nanoparticle thin films with independently tunable thickness and porosity formed via aerosol impaction-driven assembly,” (under review).

48. B. Hallam, D. Chen, J. Shi, R. Einhaus, Z. Holman, and S. Wenham, “Pre-fabrication gettering and tydrogenation treatments for silicon heterojunction solar cells: A possible path to >700 mV open-circuit voltages using low-lifetime commercial-grade p-type Czochralski silicon,” (under review).

47. S. Manzoor, Z. Yu, A. Ali, W. Ali, K. Bush, A. Palmstrom, S. Bent, M. McGehee, and Z. Holman, “Improved light management in planar silicon and perovskite solar cells using PDMS scattering layer,” Sol. Energy Mater. Sol. Cells 173, 59–65 (2017).

46. J. Becker, C. Campbell, Y. Zhao, M. Lassise, X.-H. Zhao, M. Boccard, Z. Holman, and Y.-H. Zhang, “11.2%-efficient monocrystalline Mg0.13Cd0.87Te solar cell with 1.7-eV bandgap,” IEEE J. Photovoltaics (in press).

45. M. Vaisman, K. Nay Yaung, E. Perl, D. Martín-Martín, Z. Yu, M. Leilaeioun, Z. Holman, and M. Lee, “15.3%-efficient GaAsP top cells for high-efficiency, low-cost III-V/Si tandem photovoltaics,” ACS Energy Lett. 2, 1911–1918 (2017).

44. M. Boccard, P. Firth, Z. Yu, K. Fisher, M. Leilaeioun, S. Manzoor, and Z. Holman, “Low-refractive-index nanoparticle interlayers to reduce parasitic absorption in metallic rear reflectors of solar cells,” Phys. Status Solidi A 214, 1700179 (2017).

43. J. Carpenter, M. Bailly, A. Boley, J. Shi, M. Minjares, D. Smith, S. Bowden, and Z. Holman, “Substrate-independent analysis of microcrystalline silicon thin films using UV Raman spectroscopy,” Phys. Status Solidi B 254, 1700204 (2017).

42. R. Saive, M. Boccard, T. Saenz, S. Yalamanchili, C. Bukowsky, P. Jahelka, Z. Yu, J. Shi, Z. Holman, and H. Atwater, “Silicon heterojunction solar cells with effectively transparent front contacts,” Sust. Energy Fuels 1, 593–598 (2017).

41. C. Zhang, L. Ding, M. Boccard, T. Nærland, N. Faleev, S. Bowden, Z. Holman, M. Bertoni, and C. Honsberg, “Practical approaches to mitigate minority-carrier lifetime degradation in Si wafers for III-V/Si integration,” (under review).

40. J. Becker, M. Boccard, C. Campbell, Y. Zhao, M. Lassise, Z. Holman, and Y.-H. Zhang, “Loss analysis of monocrystalline CdTe solar cells with 20% active-area efficiency,” IEEE J. Photovoltaics 7, 900–905 (2017).

39. K. Bush*, A. Palmstrom*, Z. Yu*, M. Boccard, R. Cheacharoen, J. Mailoa, D. McMeekin, R. Hoye, C. Bailie, T. Leijtens, I. Peters, M. Minichetti, N. Rolston, R. Prasanna, S. Sofia, D. Harwood, W. Ma, F. Moghadam, H. Snaith, T. Buonassisi, Z. Holman, S. Bent, and M. McGehee, “23.6%-efficient monolithic perovskite/silicon tandem solar cells with improved stability,” Nature Energy 2, 17009 (2017). * Denotes co-first author.

38. J. Becker, C. Campbell, Y. Zhao, M. Boccard, D. Mohanty, M. Lassise, E. Suarez, I. Bhat, Z. Holman, and Y.-H. Zhang, “Monocrystalline CdTe/MgCdTe double-heterostructure solar cells with ZnTe hole contact,” IEEE J. Photovoltaics 7, 307–312 (2017).

37. M. Leilaeioun and Z. Holman, “Accuracy of expressions for the fill factor of a solar cell in terms of its open-circuit voltage and ideality factor,” J. Appl. Phys. 120, 123111 (2016).

36. Z. Yu, M. Leilaeioun, and Z. Holman, “Selecting tandem partners for silicon solar cells using spectral efficiency,” Nature Energy 1, 16137 (2016).

35. Z.-Y. He, C. Campbell, M. Lassise, Z.-Y. Lin, J. Becker, Y. Zhao, M. Boccard, Z. Holman, and Y.-H. Zhang, “CdTe nBn photodetectors with ZnTe barrier layer grown on InSb substrates,” Appl. Phys. Lett. 109, 121112 (2016).

34. S. Vorndran, B. Chrysler, B. Wheelwright, R. Angel, Z. Holman, and R. Kostuk, “Off-axis holographic lens spectrum splitting system for direct and diffuse solar energy conversion,” Appl. Opt. 55, 7522–7529 (2016).

33. B. Chen, Y. Bai, Z. Yu, T. Li, X. Zheng, Q. Dong, M. Boccard, A. Gruverman, Z. Holman, and J. Huang, “Efficient semi-transparent perovskite solar cells for 23%-efficiency perovskite/silicon four-terminal tandem cells,” Adv. Energy Mat. 1601128 (2016).

32. J. Shi, M. Boccard, and Z. Holman, “Plasma-initiated rehydrogenation of amorphous silicon to increase the temperature processing window of silicon heterojunction solar cells,” Appl. Phys. Lett. 109, 031601 (2016).

31. Z. Yu, B. Wheelwright, S. Manzoor, and Z. Holman, “Silicon wafers with optically specular surfaces formed by chemical polishing,” J. Mater. Sci. Mater. Electron. 27, 10270–10275 (2016).

30. Y. Zhao, M. Boccard, S. Liu, J. Becker, X.-H. Zhao, C. Campbell, E. Suarez, M. Lassise, Z. Holman, and Y.-H. Zhang, “Monocrystalline CdTe solar cells with open-circuit voltage over 1 V and efficiency of 17%,” Nature Energy 1, 16067 (2016).

Research Activity

10/2017–09/2020 DOE PVRD-II, “Perovskite-on-silicon tandem solar cells,” (Co-PI)

10/2017–09/2019 DOE DuraMAT, “Silicon IBC modules with copper foil electrodes: Failure mechanisms of electrically conductive adhesive bonds between cells and foil,” (PI)

10/2017–09/2018 BAPVC, “Low capex solar manufacturing enabled by perovskite semiconductors,” (Co-PI)

05/2017–04/2019 NSF EAGER, “Collaborative research: 30%-efficient, stable perovskite/silicon monolithic tandem solar cells,” (PI)

02/2017–04/2017 NSF SBIR, “ The aerosol-spray deposition of photoluminescent quantum-dot coatings on substrates,” (Co-PI)

01/2017–12/2019 ARPA-E SHIELD, “Single-pane windows with insulating sprayed particulate coatings,” (PI)

12/2016–11/2017 NSF SBIR, “ Low damage sputter magnetron for silicon heterojunction PV production,” (Co-PI)

11/2016–10/2018 DOE NextGen-III, “Developing efficient silicon cells for perovskite/silicon tandem devices,” (Co-PI)

09/2016–08/2017 American Jobs Project, “Arizona’s advanced energy landscape,” (PI)

08/2016–07/2019 DOE PVRD, “Monolithic silicon module manufacturing at < 0.40 $/W,” (PI)

08/2016–07/2018 DOE PVRD, “15%-efficiency (Mg,Zn)CdTe solar cells with 1.7 eV bandgap for tandem applications,” (PI)

08/2016–07/2017 SolarReserve, “Hybrid heliostat development,” (PI)

07/2016–01/2017 FSE Technology Innovation Laboratory, “Advanced manufacturing of nanoparticle-based coatings,” (PI)

06/2016–05/2017 DOE PVRD SIPS, “A new class of tandems: Optically coupled III-V/silicon module with outdoor efficiency exceeding 30%,” (PI)

05/2016–11/2016 FSE Technology Innovation Laboratory, “Hybrid heliostat for combined photovoltaic and solar thermal power plants,” (PI)

04/2016–03/2019 NSF REU Site, “Solar energy research for the Terawatt Challenge,” (PI)

01/2016–12/2018 DOE SuNLaMP, “Overcoming bottlenecks to low-cost, high-efficiency Si PV and industrially relevant, ion implanted interdigitated back passivated contact cell development,” (Co-PI)

09/2015–08/2018 NSF Energy for Sustainability, “Collaborative research: 30%-efficient III-V/silicon tandem solar cells,” (PI)

06/2015–05/2020 USAID, “U.S.-Pakistan Centers for Advanced Studies in Energy,” (Co-PI)

05/2015–04/2016 ARPA-E I-Corps Supplement, “PVMirror: Cost competitive solar with storage,” (PI)

02/2015–01/2017 RCSA Scialog, “Scalable tandem architecture for solar water splitting,” (PI)

06/2014–05/2017 ARPA-E FOCUS, “PVMirror: A solar concentrator mirror incorporating PV cells,” (PI)

09/2013–08/2016 DOE FPACE-II, “Thin silicon solar cells: A path to 35% Shockley-Queisser limits,” (Co-PI)

08/2011–07/2021 NSF/DOE ERC, “Quantum Energy and Sustainable Solar Technologies: QESST,” (Co-PI)

06/2010–08/2010 NSF EAPSI, “Novel solar cells using silicon nanocrystals synthesized in an atmospheric-pressure plasma,” (PI)

Summer 2018 | |
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Course Number | Course Title |

EEE 590 | Reading and Conference |

EEE 592 | Research |

EEE 595 | Continuing Registration |

EEE 599 | Thesis |

EEE 690 | Reading and Conference |

EEE 790 | Reading and Conference |

EEE 792 | Research |

MSE 792 | Research |

EEE 795 | Continuing Registration |

EEE 799 | Dissertation |

Spring 2018 | |
---|---|

Course Number | Course Title |

EEE 492 | Honors Directed Study |

EEE 493 | Honors Thesis |

EEE 499 | Individualized Instruction |

EEE 590 | Reading and Conference |

EEE 592 | Research |

EEE 595 | Continuing Registration |

EEE 599 | Thesis |

EEE 690 | Reading and Conference |

EEE 790 | Reading and Conference |

PHY 792 | Research |

EEE 792 | Research |

MSE 792 | Research |

EEE 795 | Continuing Registration |

EEE 799 | Dissertation |

Fall 2017 | |
---|---|

Course Number | Course Title |

EEE 352 | Properties Electronic Material |

EEE 492 | Honors Directed Study |

EEE 493 | Honors Thesis |

EEE 499 | Individualized Instruction |

EEE 590 | Reading and Conference |

EEE 592 | Research |

EEE 595 | Continuing Registration |

EEE 598 | Special Topics |

EEE 599 | Thesis |

EEE 690 | Reading and Conference |

EEE 790 | Reading and Conference |

PHY 792 | Research |

MSE 792 | Research |

EEE 792 | Research |

EEE 795 | Continuing Registration |

EEE 799 | Dissertation |

Summer 2017 | |
---|---|

Course Number | Course Title |

EEE 590 | Reading and Conference |

EEE 592 | Research |

EEE 595 | Continuing Registration |

EEE 599 | Thesis |

EEE 690 | Reading and Conference |

EEE 790 | Reading and Conference |

EEE 792 | Research |

MSE 792 | Research |

EEE 795 | Continuing Registration |

EEE 799 | Dissertation |

Spring 2017 | |
---|---|

Course Number | Course Title |

EEE 492 | Honors Directed Study |

EEE 493 | Honors Thesis |

EEE 499 | Individualized Instruction |

EEE 536 | Semiconductor Characterization |

EEE 590 | Reading and Conference |

EEE 592 | Research |

EEE 595 | Continuing Registration |

EEE 599 | Thesis |

EEE 690 | Reading and Conference |

EEE 790 | Reading and Conference |

PHY 792 | Research |

EEE 792 | Research |

MSE 792 | Research |

EEE 795 | Continuing Registration |

EEE 799 | Dissertation |

Fall 2016 | |
---|---|

Course Number | Course Title |

EEE 352 | Properties Electronic Material |

EEE 492 | Honors Directed Study |

EEE 493 | Honors Thesis |

EEE 499 | Individualized Instruction |

EEE 590 | Reading and Conference |

EEE 592 | Research |

EEE 595 | Continuing Registration |

EEE 599 | Thesis |

EEE 690 | Reading and Conference |

EEE 790 | Reading and Conference |

PHY 792 | Research |

EEE 792 | Research |

MSE 792 | Research |

EEE 795 | Continuing Registration |

EEE 799 | Dissertation |

Summer 2016 | |
---|---|

Course Number | Course Title |

EEE 499 | Individualized Instruction |

EEE 590 | Reading and Conference |

EEE 592 | Research |

EEE 595 | Continuing Registration |

EEE 599 | Thesis |

EEE 690 | Reading and Conference |

EEE 790 | Reading and Conference |

EEE 792 | Research |

EEE 795 | Continuing Registration |

EEE 799 | Dissertation |

Spring 2016 | |
---|---|

Course Number | Course Title |

EEE 436 | Fund of Solid-State Devices |

EEE 492 | Honors Directed Study |

EEE 493 | Honors Thesis |

EEE 499 | Individualized Instruction |

EEE 590 | Reading and Conference |

EEE 591 | Seminar |

EEE 592 | Research |

EEE 595 | Continuing Registration |

EEE 599 | Thesis |

EEE 680 | Practicum |

EEE 690 | Reading and Conference |

EEE 790 | Reading and Conference |

PHY 792 | Research |

MSE 792 | Research |

EEE 792 | Research |

EEE 795 | Continuing Registration |

EEE 799 | Dissertation |

Fall 2015 | |
---|---|

Course Number | Course Title |

EEE 352 | Properties Electronic Material |

EEE 492 | Honors Directed Study |

EEE 493 | Honors Thesis |

EEE 499 | Individualized Instruction |

EEE 590 | Reading and Conference |

EEE 592 | Research |

EEE 595 | Continuing Registration |

EEE 598 | Special Topics |

EEE 599 | Thesis |

EEE 680 | Practicum |

EEE 690 | Reading and Conference |

EEE 790 | Reading and Conference |

PHY 792 | Research |

MSE 792 | Research |

EEE 792 | Research |

EEE 795 | Continuing Registration |

EEE 799 | Dissertation |

Summer 2015 | |
---|---|

Course Number | Course Title |

EEE 493 | Honors Thesis |

EEE 499 | Individualized Instruction |

EEE 590 | Reading and Conference |

EEE 592 | Research |

EEE 595 | Continuing Registration |

EEE 599 | Thesis |

EEE 680 | Practicum |

EEE 690 | Reading and Conference |

EEE 790 | Reading and Conference |

EEE 792 | Research |

EEE 795 | Continuing Registration |

EEE 799 | Dissertation |

Spring 2015 | |
---|---|

Course Number | Course Title |

EEE 465 | Photovoltaic Energy Conversion |

EEE 492 | Honors Directed Study |

EEE 493 | Honors Thesis |

EEE 499 | Individualized Instruction |

EEE 590 | Reading and Conference |

EEE 591 | Seminar |

EEE 592 | Research |

EEE 595 | Continuing Registration |

EEE 599 | Thesis |

EEE 680 | Practicum |

EEE 690 | Reading and Conference |

EEE 790 | Reading and Conference |

EEE 792 | Research |

EEE 795 | Continuing Registration |

EEE 799 | Dissertation |

Fall 2014 | |
---|---|

Course Number | Course Title |

ASU 101-EEE | The ASU Experience |

EEE 436 | Fund of Solid-State Devices |

EEE 492 | Honors Directed Study |

EEE 493 | Honors Thesis |

EEE 499 | Individualized Instruction |

EEE 590 | Reading and Conference |

EEE 591 | Seminar |

EEE 592 | Research |

EEE 595 | Continuing Registration |

EEE 598 | Special Topics |

EEE 599 | Thesis |

EEE 680 | Practicum |

EEE 690 | Reading and Conference |

EEE 790 | Reading and Conference |

EEE 792 | Research |

EEE 795 | Continuing Registration |

EEE 799 | Dissertation |

Summer 2014 | |
---|---|

Course Number | Course Title |

EEE 493 | Honors Thesis |

EEE 499 | Individualized Instruction |

EEE 590 | Reading and Conference |

EEE 592 | Research |

EEE 595 | Continuing Registration |

EEE 599 | Thesis |

EEE 680 | Practicum |

EEE 684 | Internship |

EEE 690 | Reading and Conference |

EEE 790 | Reading and Conference |

EEE 792 | Research |

EEE 795 | Continuing Registration |

EEE 799 | Dissertation |

Spring 2014 | |
---|---|

Course Number | Course Title |

EEE 498 | Pro-Seminar |

EEE 590 | Reading and Conference |

EEE 591 | Seminar |

EEE 592 | Research |

EEE 595 | Continuing Registration |

EEE 599 | Thesis |

EEE 680 | Practicum |

EEE 690 | Reading and Conference |

EEE 790 | Reading and Conference |

EEE 792 | Research |

EEE 795 | Continuing Registration |

EEE 799 | Dissertation |

Fall 2013 | |
---|---|

Course Number | Course Title |

EEE 436 | Fund of Solid-State Devices |

EEE 590 | Reading and Conference |

EEE 591 | Seminar |

EEE 592 | Research |

EEE 595 | Continuing Registration |

EEE 599 | Thesis |

EEE 680 | Practicum |

EEE 690 | Reading and Conference |

EEE 790 | Reading and Conference |

EEE 792 | Research |

EEE 795 | Continuing Registration |

EEE 799 | Dissertation |