光学
材料科学
发射率
辐射传输
算法
分析化学(期刊)
计算机科学
物理
化学
色谱法
作者
Mounir Zahir,Mourad Benlattar
出处
期刊:Applied Optics
[The Optical Society]
日期:2021-01-08
卷期号:60 (2): 445-445
被引量:8
摘要
It is widely known that the conversion efficiency and lifetime of solar cell modules decrease with higher operating temperatures. To maximize both efficiency and reliability, solar cell modules benefit greatly from the use of daytime passive radiative cooling techniques. In this study, we introduce a simple, low-cost, double-layer coating based on porous T i O 2 as a daytime passive radiative cooling system to achieve sub-ambient operating temperatures in a solar cell module. The top and bottom layers of the implemented design are porous T i O 2 and BK7 (glass), respectively. This solar cell/radiative cooling hybrid design is capable of achieving both high solar absorption in the photovoltaic conversion band 0.3–1.1 µm and high emissivity over 0.96 in the atmospheric transparency window 8–13 µm, while rejecting parasitic solar absorption. At 800 W / m 2 solar heating power, we found that adding the proposed cooling design on top of mono-crystalline silicon (m-Si), the solar cell panel lowered its operating temperature by 18.04°C, leading to a relative (effective) efficiency advantage of 21.56%. Additionally, at steady-state temperature (325 K), the power conversion efficiency of our radiative-cooler-coated m-Si solar cell is estimated to reach 20.46%, in contrast to 16.83% for an uncoated silicon solar cell. When compared with an uncoated silicon solar cell, optoelectronic simulations of our coated silicon solar cell show a short-circuit current density J s c as high as 5.07 m A / c m 2 , and the open circuit voltage V o c increased from 771.78 to 776.3 mV.
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