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成果報告書詳細
管理番号20170000000750
タイトル*平成28年度中間年報 高性能・高信頼性太陽光発電の発電コスト低減技術開発 太陽電池セル、モジュールの共通基盤技術開発 先端複合技術シリコン太陽電池プロセス共通基盤に関する研究開発(アモルファス・結晶界面における構造及び電気的特性に関する研究)
公開日2017/8/29
報告書年度2016 - 2016
委託先名国立大学法人東京工業大学
プロジェクト番号P15003
部署名新エネルギー部
和文要約
英文要約Title: Development of high performance and reliable PV modules to reduce levelized cost of energy/ Development of common components for solar cells and modules/Research on silicon solar cell process based on advanced combined technologies (Research on the structure and electrical properties of the interface between hydrogenated amorphous silicon based material and crystalline silicon) (FY2015-2017) FY2016 Annual Report, Tokyo Institute of Technology

(1)Detailed analysis of hydrogenated amorphous silicon (a-Si:H) based material/crystalline silicon (c-Si) hetero-interface:
The interface between aluminum oxide (Al2O3) and c-Si was investigated by using temperature-dependent QSSPC measurements. The effective carrier lifetime increased with the measurement temperature. Our numerical simulation revealed that the temperature dependence is not influenced by the interface fixed charge density. The interface defect density and its energy distribution mainly affect the temperature dependence. These results suggest that the temperature dependent QSSPC measurement is useful tool to investigate the oxide material/c-Si interface which is important for surface passivation structure using tunnel oxide.
(2)Development of low damage deposition technique for metal oxide based emitter
Metal oxides are promising materials for the emitter layer of silicon heterojunction (SHJ) solar cells. We investigated the properties of a nitrogen-doped p-type cuprous oxide (p-Cu2O:N) emitter deposited by sputtering techniques. The effective lifetime measurements using i-a-Si:H/n-c-Si/i-a-Si:H/p-Cu2O:N structures revealed that annealing temperature is significantly important for good surface passivation. A conversion efficiency of more than 10% has been obtained from p-Cu2O:N/i-a-Si:H/n-c-Si heterojunction solar cells. The detailed analysis of the solar cells revealed that the optimization of the TCO deposition condition is required to obtain better solar cell performance.
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