Degradation behavior of electrical properties of inverted metamorphic tri-junction solar cells under 1 MeV electron irradiation
| Autor: | Yi Wang, Huijie Zhao, Yiyong Wu, Yanqing Zhang, Chengyue Sun, Jianfeng Lu, Jianwen Xue, Jingdong Xiao, Hongbin Geng |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Photoluminescence Renewable Energy Sustainability and the Environment Chemistry Analytical chemistry 02 engineering and technology Carrier lifetime Electron 021001 nanoscience & nanotechnology 01 natural sciences Fluence Surfaces Coatings and Films Electronic Optical and Magnetic Materials Amplitude Nuclear magnetic resonance 0103 physical sciences Electron beam processing Degradation (geology) Irradiation 0210 nano-technology |
| Zdroj: | Solar Energy Materials and Solar Cells. 157:861-866 |
| ISSN: | 0927-0248 |
| DOI: | 10.1016/j.solmat.2016.08.006 |
| Popis: | In this study, the degradation effects of inverted metamorphic tri-junction (IMM3J) solar cells were investigated after 1 MeV electron irradiation using spectral response and photoluminescence (PL) signal amplitude analysis, as well as electrical property measurements. The results show that, similar to traditional tri-junction (TJ) GaInP/GaAs/Ge solar cells, the electrical properties (such as I sc , V oc , and P max ) degrade as a function of log φ , where φ represents the electron fluence. In particular, the degradation of V oc is more serious than that of I sc because of the sum rule for V oc and the limit rule for I sc in IMM3J cells. Analysis of the spectral response curves indicates that, unlike traditional TJ cells, the bottom In 0.3 Ga 0.7 As (1.0 eV) sub-cell exhibits the most severe damage in the irradiated IMM3J cells. Meanwhile, the PL amplitude measurements qualitatively confirm that the degradation in the effective minority carrier lifetime τ eff of single junction (SJ) In 0.3 Ga 0.7 As cells is more drastic than that of SJ GaAs cells after irradiation. Thus, the output current of the In 0.3 Ga 0.7 As sub-cell should be the rate-limiting cell in the irradiated IMM3J cells. |
| Databáze: | OpenAIRE |
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