S
Steven W. Johnston
Researcher at National Renewable Energy Laboratory
Publications - 24
Citations - 565
Steven W. Johnston is an academic researcher from National Renewable Energy Laboratory. The author has contributed to research in topics: Carrier lifetime & Photovoltaic system. The author has an hindex of 9, co-authored 24 publications receiving 457 citations.
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Journal ArticleDOI
Dilute nitride GaInNAs and GaInNAsSb solar cells by molecular beam epitaxy
David B. Jackrel,Seth R. Bank,Homan B. Yuen,Mark A. Wistey,James S. Harris,Aaron J. Ptak,Steven W. Johnston,Daniel J. Friedman,Sarah Kurtz +8 more
TL;DR: In this article, the use of biased deflection plates during GaInNAs growth improved the performance of dilute nitride solar cells and achieved the best performance in terms of dark current density, open-circuit voltage, and fill factor.
Journal ArticleDOI
Thin-Film Solar Cells with 19% Efficiency by Thermal Evaporation of CdSe and CdTe
Tursun Ablekim,Joel N. Duenow,Xin Zheng,Helio Moutinho,John Moseley,Craig L. Perkins,Steven W. Johnston,Patrick O’Keefe,Eric Colegrove,David S. Albin,Matthew O. Reese,Wyatt K. Metzger +11 more
TL;DR: CdTe-based solar cells exhibiting 19% power conversion efficiency were produced using widely available thermal evaporation deposition of the absorber layers on SnO2-coated glass with or without a t...
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Temperature Coefficients of Perovskite Photovoltaics for Energy Yield Calculations
Taylor Moot,Jay B. Patel,Jay B. Patel,Gabriel McAndrews,Gabriel McAndrews,Eli J. Wolf,Eli J. Wolf,Eli J. Wolf,Daniel Morales,Daniel Morales,Isaac E. Gould,Isaac E. Gould,Bryan A. Rosales,Caleb C. Boyd,Caleb C. Boyd,Caleb C. Boyd,Lance M. Wheeler,Philip A. Parilla,Steven W. Johnston,Laura T. Schelhas,Michael D. McGehee,Michael D. McGehee,Joseph M. Luther +22 more
TL;DR: The temperature coefficients for maximum power (TPCE), open circuit voltage (VOC), and short circuit current (JSC) are standard specifications included in data sheets for any commercially available pho...
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Measuring temperature-dependent activation energy in thermally activated processes: A 2D Arrhenius plot method
TL;DR: The case study of deep level emission in a Cu(In,Ga)Se(2) solar cell using the 2D Arrhenius plot method reveals clear temperature dependent behavior of E(a) and nu(0), which has not been observable by its 1D predecessors.
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Relationship of Open-Circuit Voltage to CdTe Hole Concentration and Lifetime
Joel N. Duenow,James M. Burst,David S. Albin,Matthew O. Reese,Soren A. Jensen,Steven W. Johnston,Darius Kuciauskas,Santosh K. Swain,Tursun Ablekim,Kelvin G. Lynn,Alan L. Fahrenbruch,Wyatt K. Metzger +11 more
TL;DR: In this paper, the correlation of bulk CdTe and CdZnTe material properties with experimental open-circuit voltage (V oc) through fabrication and characterization of diverse single-crystal solar cells with different dopants was investigated.