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- W3168965411 abstract "In this study, we attempted to elucidate the carrier dynamics behind the abnormal characteristics of photogenerated current and voltage ( <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=m1> <mml:mrow> <mml:msub> <mml:mi>I</mml:mi> <mml:mrow> <mml:mi>Ph</mml:mi> </mml:mrow> </mml:msub> </mml:mrow> </mml:math> and <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=m2> <mml:mrow> <mml:msub> <mml:mi>V</mml:mi> <mml:mrow> <mml:mi>Ph</mml:mi> </mml:mrow> </mml:msub> </mml:mrow> </mml:math> ) at cryogenic temperature in III-nitride optoelectronic semiconductors by employing space-charge theory. To this end, we carefully investigated and analyzed excitation-power-dependent <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=m3> <mml:mrow> <mml:mi>I</mml:mi> <mml:mo>–</mml:mo> <mml:mi>V</mml:mi> </mml:mrow> </mml:math> (PDIV) curves operated by quasiresonant excitation of an AlGaInN-based <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=m4> <mml:mrow> <mml:mi mathvariant=normal>p</mml:mi> <mml:mtext>−</mml:mtext> <mml:mi mathvariant=normal>i</mml:mi> <mml:mtext>−</mml:mtext> <mml:mi mathvariant=normal>n</mml:mi> </mml:mrow> </mml:math> junction semiconductor at 300 K and 15 K. At 300 K, the curves exhibited typical characteristics and were well described by the conventional theory. However, the PDIV curves at 15 K could no longer be described by the conventional theory. To elucidate the mechanism behind this phenomenon, we proposed a model in which the space-charge effect (SCE) plays a key role. Based on this model, we proposed the modified Shockley diode equation, which can explain the PDIV characteristic at 15 K, including the SCE. We also discussed the SCE on the efficiency of devices." @default.
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- W3168965411 date "2021-08-24" @default.
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- W3168965411 title "Space-charge effect on photogenerated-current and -voltage in III-nitride optoelectronic semiconductors" @default.
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- W3168965411 doi "https://doi.org/10.1364/prj.428470" @default.
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