成果報告書詳細
管理番号20130000000808
タイトル*平成24 年度中間年報 太陽エネルギー技術研究開発 革新的太陽光発電技術研究開発 (革新型太陽電池国際研究拠点整備事業) 高効率集光型太陽電池セル、モジュール及びシステムの開発 (日EU 共同開発) 集光型太陽電池セル、モジュールの標準測定技術の開発(WP4)
公開日2014/8/27
報告書年度2012 - 2012
委託先名独立行政法人産業技術総合研究所
プロジェクト番号P07015
部署名新エネルギー部
和文要約
英文要約Title: R&D on innovative Solar Cells (International Research Center for Innovative Solar Cell Program) "Ultra-high efficiency concentration photovoltaics (CPV) cells, modules and systems (WP 4:Development of characterization tools for CPV cells, modules and systems)"(FY2011-FY2013) FY2012 Annual Report

1. Measurement techniques for multi-junction concentrator PV (CPV) cells
Performance of the solar simulator for measuring concentrator PV cells was investigated in detail. Spatial uniformity of the irradiance within the effective area at different concentration levels (40 - 700 suns) and different spectral bands (top, middle and bottom wavelength bands) were investigated. Experimental results showed that the spatial uniformity is dependent on both the spectral band and the concentration level.
The first round-robin performance measurement intercomparison with Fraunhofer ISE has been carried out. Two kinds of triple-junction PV cells for concentrator use (GaInP/GaAs/Ge and GaInP/GaAs/InGaAs) were used in the event. Good agreement in the measurement results of Isc, Voc, Pmax and FF under 1 sun of within 1.8% was confirmed. The agreement under concentrated light of 40 - 700 suns was about 5%. These results have demonstrated that improvement in the measurement reproducibility and uncertainty is expected, by further investigating these uniformity effects and by developing appropriate correction procedure. Accurate measurement of the incident light is also a major technical issue.

2. Characterization technologies for CPV mini-modules
Angular dependence of the performance of CPV mini-modules was investigated outdoors by using natural sunlight and indoors by using highly parallel continuous solar simulator (HPCSS) light. The angular dependences measured indoors and outdoors showed slight difference due to the circum solar component of natural sunlight and lager angular divergence of HPCSS. These effects are estimated to contribute to the measured Isc of by about 1.7%. The spectral agreement of the HPCSS with the reference solar spectrum and was confirmed to be +/- 1.6%,2.5%, and 3.3% for the spectral bands of the top, middle, and bottom cells, respectively. The estimated output current of each component cell under HPCSS could be controlled to within 2 - 3% of that under the reference solar spectrum and several natural sunlight spectrum. The I-V curves measured indoors and outdoors also agreed within 2 - 3%. Further improvement is expected by correcting for the spectrum and angular divergence of the solar simulator. Round-robin performance measurement intercomparison of CPV mini-modules with Fraunhofer ISE is carried out.
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