成果報告書詳細
管理番号20120000000373
タイトル*平成23年度中間年報 太陽エネルギー技術研究開発 太陽光発電システム次世代高性能技術の開発 有機薄膜太陽電池モジュール創製に関する研究開発(高分子系有機薄膜太陽電池モジュールの研究開発)
公開日2013/6/25
報告書年度2011 - 2011
委託先名住友化学株式会社
プロジェクト番号P07015
部署名新エネルギー部
和文要約和文要約等(以下本編抜粋)
平成24年度の中間目標として、セル効率8%、モジュール効率6%、耐久性として相対効率低下10%以下(JIS規格C8938)、平成26年度の最終目標として、セル効率12%、モジュール効率10%、耐久性として相対効率低下10%以下(JIS規格C8938)の特性を有する有機薄膜太陽電池の開発を推進中。当社が担当の高分子系有機薄膜太陽電池の開発状況について報告する。
当社は、これまでに、長波長域に吸収を有する独自ポリマーの開発に成功しており、今年度、ポリマー側鎖修飾による高効率化を検討した。各種側鎖修飾検討の結果、モルフォロジーの制御が可能となり、90%を超える高い消光率の実現に成功した。このような高い消光率は、良好な相分離サイズが実現できたことを示唆しており、その結果、単セルで8.6%(2mm角)の過去最高効率を達成した。
 より広範囲の光を活用し、更なる高効率化が期待できるタンデムセルの検討では、最新材料の適用や膜厚の最適化などで、昨年度よりも高い効率を実現し、産総研の精密測定で8.5%(1cm角)と、中間目標を上回る効率を達成した。
大型サブモジュールの検討については、スクライブによるパターニングを検討し、開口率80%の実現に成功した。更にこれまでに検討した高効率化技術も適用した結果、産総研での精密測定にて、有機薄膜太陽電池としては世界最高レベルの効率4.2%(da)(20cm角)を達成した。
英文要約Title : High Performance PV Generation System for the Future. Development of module of organic thin-film solar cell(Sub-theme : Development of module of organic thin-film solar cell using conjugated polymer) (FY2010-FY2012) FY2011 Annual Report
 
In order to achieve the national target for introducing photovoltaic power generation system of 53GW by 2030, inexpensive and less resource-s limitedation organic thin film solar cell (OPV) modules are going to be investigated and developed. The intermediate target performances in 2012 are cell efficiency of 8%, module efficiency of 6% and relative efficiencydurability drop of less than 10% (Japanese Industrial Standards C8938) as durability. The final target performances in 2014 are cell efficiency of 12%, module efficiency of 10% and relative durability efficiency drop of less than 10% (Japanese Industrial Standards C8938) as durability. Five organizations including our company, Sumitomo Chemical, cooperate to achieve the objective. Sumitomo Chemical is in charge of the research and development of the OPV modules using conjugated polymers. For a concreteThe policy for research and development policies are as follows:. (1) Creation of composition from materials for high efficiency photoelectric conversion materials. (2) Development of production technology for high-performance and large-sizescale modules production technology. We have already found our originalnovel low band gap polymers having 900nm absorption edge wavelength, called polymer A, by which larger efficiency thanthat 15% would potentially be of potential efficiency can be expected. We have reported that 8.1% was achieved by morphology control and increaseding of molecular weight of polymer A last year. In this year we tried to achieve the higher efficiency by modification of side chains of polymers to control the morphology. As thea result, we succeeded to ssfully controlled the morphology and more than 90% of fluorescence quenching efficiencies for fluorescence was observed. The high fluorescence quenching efficiencies for fluorescence means shows the exciton generated by the absorption of light reaches well to the p/n interfaces and suggests that the phase separation size is almost close to the ideal optimized size. As aa result, we achieved our best efficiency of 8.6% which is our best efficiency to date. Regarding the development of tandem cells that we can expect higher efficiency because of use oftilizing wide range of light, we reported efficiency of 8.19% efficiency last year. In this year, we succeeded to get higher efficiency by appliedying the latest material and the optimization of film thickness, and successfully achieved higher efficiency of 8.5%(1cm2) measured at AIST, which exceeds the intermediate target of this project. Regarding the development of modules, we have reported the 3.1%(ap)(aperture ratio: 70%) efficiency of sub-module of 20cm x 20cm size last year which is fabricated by the method of stripe coating. In this year, we started to try the scribing as a patterning method, by using scribing thatwhich we can expect higher aperture ratio. As a result, we succeded tossfully achievedrealize aperture ratio of 80% aperture ratio. In addition, since we also applied our technologiesy for higher efficiency in this system additionally, so that we achieved 4.2%(ap) measured at AIST. This result was published in the solar cell efficiency tables (version 39)(Prog. Photovolt: Res. Appl. 2012; 20:12-20)as the world record of OPV sub-module at that time.
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