کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
78216 49320 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Space charge effects on the maximum efficiency and parametric design of a photon-enhanced thermionic solar cell
ترجمه فارسی عنوان
اثرات شار فضایی بر حداکثر کارایی و طراحی پارامتری سلول خورشیدی گرمایشی افزایش یافته توسط فوتون
کلمات کلیدی
سلول خورشیدی گرماسونی افزایش یافته توسط فوتون، هزینه فضا، مواد کاتدی، حداکثر بازده، طراحی پارامتریک
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


• An existing model of solar cells is updated to include space charge effects.
• Space charge effects are quantitatively analyzed.
• The maximum efficiency of a photon-enhanced thermionic solar cell is calculated.
• The influences of key parameters on the efficiency are discussed.

With the help of the Langmuir space charge theory, the performance of a photon-enhanced thermionic solar cell (PETSC) limited by space charge is discussed. It is found that space charge effects become important for the PETSC when the gap width between two electrodes is a few microns or more. At these distances, near-field heat transfer effects are negligible because the gaps are larger than the characteristic wavelength of the thermal radiation, as given by Wien's displacement law. The effects of the energy band gap, electron affinity and temperature of the cathode on the efficiency of the PETSC are analyzed in detail. The maximum efficiency of the PETSC limited by the space charge is calculated under different constraint conditions. Although the maximum efficiency obtained here is much smaller than that calculated theoretically by Schwede et al., Nature Materials 9 (2010) 762, it may be higher than those of traditional solar cells and thermionic devices as long as the gap width of two electrodes is rationally designed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy Materials and Solar Cells - Volume 121, February 2014, Pages 137–143
نویسندگان
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