成果報告書詳細
管理番号20090000000075
タイトル*平成20年度中間年報 太陽光発電システム共通基盤技術研究開発 太陽電池評価技術の研究開発
公開日2009/7/30
報告書年度2008 - 2008
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技術開発部 太陽電池グループ
和文要約以下本編抜粋:1.研究開発の内容及び成果等(1)新型太陽電池性能評価技術 1各種新型太陽電池性能評価技術 各種新型太陽電池セルに特有の温度照度特性等の特有な性質を検討した。色素増感太陽電池,有機薄膜太陽電池等の新型太陽電池等では、温度照度特性は結晶Si太陽電池と線形性等が異なるが、温度照度補正式は前年度までに開発した同じものが適用できることを明らかにした。
英文要約Title:R&D of characterization technology of solar cells (FY2006-FY2009) FY2008 Annual Report
1. Performance Characterization Technology for New-Type Solar Cells (1) Characterization technology for various kinds of new-type solar cells : The effects of the temperature and irradiance on the output performance of various kinds of solar cells have been investigated. It has been found that novel devices such as the dye sensitized solar cells (DSC) and organic thin film solar cells (OSC) show different temperature dependence and/or irradiance dependence than conventional solar cells. It has been confirmed that the translation equation developed in the present project is valid also for DSC and OSC. The translation equation is under discussion at IEC as the Japanese proposal. A convenient simulation method to estimate the impact of the revision in the reference solar spectrum of IEC has been developed. (2) Characterization technology at variable conditions : Indoor measurement technology for the I-V curves of PV modules at low temperature range of 15-25 °C has been confirmed by using the module cooling apparatus. In combination with the module heating apparatus developed so far, the I-V curves of PV modules at almost all the temperature range of outdoor operation (15-65 °C) can be evaluated by precise indoor measurements. 2. Accuracy Improvement of calibration technology : The uncertainty of the primary reference cell calibration by the solar simulator method in AIST was analyzed, and it was clarified that the value was 1% or less of an international, highest level. This uncertainty estimation receives the examination of the NITE recognition center which is the international accreditation body in Japan, and the validity is confirmed. Various analyses by the Monte Carlo simulation were executed as part of the uncertainty analysis of the secondary reference module method with using solar simulator. To reduce the difference of systematic errors of the secondary reference module method using solar simulator and natural sunlight method, it was clarified that an improvement which was insufficient but combined was effective to do a uniformity improvement of the solar simulator for the improvement of the difference of the characteristic of the cell which composed the reference module and the measurement individually by the analysis. Moreover, a uniformity allowance of the irradiance to the solar simulator for the measurement of the IEC standard and JIS standard was evaluated by this technique. As a result, it has been understood that the risk that the allowance of the IEC standard (±5%)undervalues than the allowance of JIS(±3%) is high. 3. The long term reliability test of PV modules (1) The combined stresses acceleration test for the equivalent module : The specification of the equivalent mini module for the module B (made by a domestic company B, polycrystalline Si, 150x150mm, 42 cells in series, W990×L1165mm) was designed and we ordered thirty modules and obtained them. The thermal cycle test with UV irradiation in high temperature was carried out. After it, delamination spots appeared in module A (made by domestic company A, polycrystalline Si, 150x150mm, 12 cells in series, W345×L972mm) and swells in back sheet appeared in module C (made by domestic company B, polycrystalline Si, 125x125mm, 16 cells in series, W330×L1212mm). (2) The collection of the outdoor exposure data : As a PV module failure analysis, the visual inspection for the whole PV module systems installed in AIST-MST (mega solar town) was started; a half of those was inspected. The kind, number and tendency of failures were summarized in the system (= company) independence. Though there was a little bit of difference by the system, delamination as the main failure and burnt, cracks, discoloration as the others were observed.
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