太陽電池の機器分析による多角的評価

摘要

A Cell, a photovoltaic element of a photovoltaic system, is classified roughly into four groups; crystalline silicon cell, thin film silicon cell, CIS/CIGS thin film cell, and organic cell (dye-sensitized cell and organic thin film cell). Cells, a terminal box, a terminal cable, and other parts are assembled to form a module. The present paper describes evaluation of properties and performance of the cells and modules using analytical methods. For the crystalline silicon cell, the texture of a Si substrate and the 3-D shape and the sintering process of a front Ag electrode were observed, and the properties of light elements contained in polycrystalline silicon were evaluated. For the thin film silicon cell, the texture and the laser patterning of a TCO film were observed and the transmittance of a TCO film was determined. For the CIGS thin film cell, the surface and laser patterning of a Mo back electrode were observed and the composition and crystal structure of a CIGS thin film were determined. For the organic cell, impurities contained in N719 dye were analyzed. For the module, we performed the ultraviolet degradation test and the strength tests of an ethylene-vinyl acetate copolymer (EVA) film used as transparent adhesive sealing film.%太陽電池の発電素子であるセルには，結晶シリコン，薄膜シリコン，化合物系（CIS/CIGS薄膜），有機系（色素増感，有機薄膜）の4種類があり，これらのセルを中心に部材を組み立てモジュールと呼ばれる最終製品となる。ここでは各種セルおよびモジュールの部材を様々な分析手法で特性や性能を評価した結果を示す。結晶シ1）コンでは，Si表面テクスチャー形状，表面Ag電極の3次元形状・焼結過程，多結晶Si中の軽元素についての評価結果を示す。薄膜シリコンでは，TCO膜の表面テクスチャー形状，透過率，レーザーパターニングについての評価結果を示す。化合物系（CIGS薄膜）では，Mo裏面電極の表面およびパターニング形状CIGS薄膜の組成および結晶構造についての評価結果を示す。有機系では色素増感に用いるRu色素N719の不純物分析を行った結果を示す。モジュールでは，接着封止透明フイルムとして用いられるエチレンー酢酸ビニル共重合体（EVA）について紫外線劣化解析，強度試験を行った結果を示す。