World's Best Scientists 2026 revealed!

D-Index & Metrics

Materials Science

D-Index
60
Citations
15801
World Ranking
6953
National Ranking
1750

Engineering and Technology

D-Index
60
Citations
15611
World Ranking
2149
National Ranking
680

Research.com Recognitions

  • 2018 - Fellow of American Physical Society (APS) Citation For outstanding contributions in the field of IIIV semiconductor physics and multijunction photovoltaic science and groundbreaking work in the materials physics of ordering in IIIV alloys and optics and device physics for novel structures and record solar conversion efficiencies

Overview

Daniel J. Friedman is affiliated with the National Renewable Energy Laboratory in the United States. Their work focuses on the physics and materials science aspects of semiconductor technologies, particularly in relation to photovoltaic systems. The scientist's contributions relate to understanding and enhancing the properties of III-V semiconductor alloys and the physics underlying multijunction photovoltaic devices.

Friedman's recognized expertise encompasses the materials physics of ordering phenomena in III-V alloys and the optical and device physics associated with novel semiconductor structures. These areas are central to advancing solar conversion efficiency in photovoltaic applications.

In 2018, Daniel J. Friedman was awarded the Fellow of the American Physical Society (APS). The citation for the award highlights outstanding contributions in the field of III-V semiconductor physics and multijunction photovoltaic science, including groundbreaking research into the materials physics of ordering in III-V alloys and the physics of optics and device design for innovative structures and solar conversion efficiency improvements.

Best Publications

  • Band Anticrossing in GaInNAs Alloys

    W. Shan;W. Walukiewicz;J. W. Ager;E. E. Haller

  • 40.8% efficient inverted triple-junction solar cell with two independently metamorphic junctions

    J. F. Geisz;D. J. Friedman;J. S. Ward;A. Duda

  • High-efficiency GaInP∕GaAs∕InGaAs triple-junction solar cells grown inverted with a metamorphic bottom junction

    J. F. Geisz;Sarah Kurtz;M. W. Wanlass;J. S. Ward

  • 1-eV solar cells with GaInNAs active layer

    D.J. Friedman;J.F. Geisz;S.R. Kurtz;J.M. Olson

  • 29.5%‐efficient GaInP/GaAs tandem solar cells

    K. A. Bertness;Sarah R. Kurtz;D. J. Friedman;A. E. Kibbler

  • III-N-V semiconductors for solar photovoltaic applications

    J F Geisz;D J Friedman

  • Nitrogen-Activated Transitions, Level Repulsion, and Band Gap Reduction in GaAs 1-x N x with x < 0.03

    J. D. Perkins;A. Mascarenhas;Yong Zhang;J. F. Geisz

  • Photocurrent of 1 eV GaInNAs lattice-matched to GaAs

    J.F. Geisz;D.J. Friedman;J.M. Olson;S.R. Kurtz

  • Optical enhancement of the open-circuit voltage in high quality GaAs solar cells

    M. A. Steiner;J. F. Geisz;I. García;D. J. Friedman

  • Enhanced external radiative efficiency for 20.8 efficient single-junction GaInP solar cells

    J. F. Geisz;M. A. Steiner;I. García;S. R. Kurtz

  • Structural changes during annealing of GaInAsN

    Sarah Kurtz;J. Webb;L. Gedvilas;D. Friedman

  • Thermophotovoltaic Efficiency of 40

    Alina LaPotin;Kevin L. Schulte;Myles A. Steiner;Kyle Buznitsky

  • Dilute nitride GaInNAs and GaInNAsSb solar cells by molecular beam epitaxy

    David B. Jackrel;Seth Robert Bank;Homan B. Yuen;Mark A. Wistey

  • Effect of nitrogen on the band structure of GaInNAs alloys

    W. Shan;W. Walukiewicz;J. W. Ager;E. E. Haller

  • Progress and challenges for next-generation high-efficiency multijunction solar cells

    D.J. Friedman

  • Multi-junction, monolithic solar cell using low-band-gap materials lattice matched to GaAs or Ge

    Jerry M. Olson;Sarah R. Kurtz;Daniel J. Friedman

  • Building a Six-Junction Inverted Metamorphic Concentrator Solar Cell

    John F. Geisz;Myles A. Steiner;Nikhil Jain;Kevin L. Schulte

  • Band Anticrossing in III-N-V Alloys

    W. Shan;W. Walukiewicz;K.M. Yu;J.W. Ager

  • Application of a novel multiple scattering approach to photoelectron diffraction and Auger electron diffraction

    A.P. Kaduwela;D.J. Friedman;C.S. Fadley

  • Final-state effects in photoelectron diffraction

    D.J. Friedman;C.S. Fadley

Frequent Co-Authors

John F. Geisz
John F. Geisz National Renewable Energy Laboratory
Sarah Kurtz
Sarah Kurtz University of California, Merced
J. M. Olson
J. M. Olson National Renewable Energy Laboratory
Myles A. Steiner
Myles A. Steiner National Renewable Energy Laboratory
Charles S. Fadley
Charles S. Fadley University of California, Davis
I. Lindau
I. Lindau Stanford University
Andrew G. Norman
Andrew G. Norman National Renewable Energy Laboratory
W. E. Spicer
W. E. Spicer Stanford University
Richard R. King
Richard R. King Arizona State University
Mowafak Al-Jassim
Mowafak Al-Jassim National Renewable Energy Laboratory

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

If you're interested in expanding your expertise beyond engineering and technology, a variety of online degrees can help you diversify your skillset and enhance your career prospects. For those aiming to strengthen their communication skills—an essential asset for engineers working in multidisciplinary teams—an online master’s in communication can equip you with advanced techniques in interpersonal, organizational, and technical communication.

Aspiring entrepreneurs or professionals passionate about launching startups may benefit from an mba in entrepreneurship, which covers innovation management, business planning, and venture finance. Alternatively, those seeking a more general business foundation might consider online mba programs no gmat, allowing you to enhance your strategic management and leadership abilities without the added barrier of entrance exams.

For individuals drawn to organizing complex projects or leading cross-functional teams, an online project management degree can provide practical tools and recognized certifications in planning, execution, and oversight. These related degrees open a range of career pathways, supporting both technical and leadership ambitions across today’s technology-driven workplaces.

Best Scientists Citing Daniel J. Friedman

Trending Scientists