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- W3026430892 abstract "Field-effect solar cells (FESCs) are increasingly attractive for 2-D heterojunction solar cells and especially for gate-tunable Schottky-junction solar cells. A prerequisite for applying FESCs is that the gate-leakage (GL) power must be far less than the output power. However, the conduction mechanism of the GL current in a FESC has yet to be described clearly, thereby leading to excessive gate power consumption. In this work, the GL current mechanisms for a silicon FESC are extracted and analyzed using temperature-dependent current-voltage measurements under dark and illuminated conditions. It shows that the GL current for a FESC in the dark is dominated by both temperature-dependent Poole-Frenkel (P-F) emission and hopping conduction, whereas, under illumination changes to the temperature-independent space-charge-limited (SCL) current. Furthermore, whether the incident light power of 62.5, 100, or 125 mW/cm <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sup> is used, or the gate dielectric of SiO2 is replaced by HfO2, the dominant GL current mechanism is consistent. Finally, the trap energy level is approximately calculated as 0.38-0.72 eV based on a P-F emission analysis; the mean trap spacing of 0.01-0.18 nm and the activation energy of approximately 0.02 and 0.05 eV are extracted by a hopping conduction analysis. Meanwhile, a rigorous SCL conduction analysis provides a carrier mobility of 1.4 × 10 <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>-8</sup> cm <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sup> ·V <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>-1</sup> ·s <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>-1</sup> in SiO2 and 5.3 × 10 <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>-8</sup> cm <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sup> ·V <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>-1</sup> ·s <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>-1</sup> in HfO2." @default.
- W3026430892 created "2020-05-29" @default.
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- W3026430892 date "2020-07-01" @default.
- W3026430892 modified "2023-10-18" @default.
- W3026430892 title "Gate-Leakage Current Mechanisms in Silicon Field-Effect Solar Cells" @default.
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- W3026430892 doi "https://doi.org/10.1109/jphotov.2020.2992353" @default.
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