Calibration standards and measurement accuracy of absolute electroluminescence and internal properties in multi-junction and arrayed solar cells
Calibration standards and measurement accuracy of absolute electroluminescence and internal properties in multi-junction and arrayed solar cells
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DOI：
10.1117/12.2211726
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发表时间：
2016-03
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通讯作者：
M. Yoshita;Lin Zhu;Changsu Kim;T. Mochizuki;Tetsuya Nakamura;M. Imaizumi;Shaoqiang Chen;Hidehiro Kubota;Y. Kanemitsu;H. Akiyama
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文献类型：
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作者：
M. Yoshita;Lin Zhu;Changsu Kim;T. Mochizuki;Tetsuya Nakamura;M. Imaizumi;Shaoqiang Chen;Hidehiro Kubota;Y. Kanemitsu;H. Akiyama
我们开发了绝对电致发光（EL）测量的方法和校准标准，用于多结和阵列太阳能电池各种内部特性的无接触评估，如开路电压、外部和内部辐射效率以及发光耦合效率。比较了使用的几种独立校准方法：1）校准的EL成像系统，2）大面积光电二极管的接近测量，3）积分球系统，以及4）具有圆形孔径的平面发光二极管。比较澄清了每种方法的优点和缺点，并在30%的不确定度内表现出一致性，导致开路电压测量的不确定度为7 meV。
We developed methodologies and calibration standards for absolute electroluminescence (EL) measurements for CONTACT-LESS evaluation of various internal properties of multi-junction and arrayed solar cells, such as open-circuit voltages, external and internal radiative efficiencies, and luminescence-coupling efficiency. Several independent calibration methods were compared that used: 1) a calibrated EL imaging system, 2) proximity measurement with a large-area photodiode, 3) an integrating-sphere system, and 4) planar light-emitting diodes with a circular aperture. The comparison clarified the advantages and disadvantages of each method, and showed consistency within 30% uncertainty, resulting in a 7-meV uncertainty in open-circuit voltage measurements.