利用官能化石墨烯提升高分子太陽能電池之效率

我們採用改良式Hummer法製備氧化石墨烯（graphene oxide，GO），透過長鏈之辛胺進行官能化，製備辛胺官能化石墨烯（F-GNS）。我們將將不同濃度0.05 mg/ml、0.1 mg/ml、0.3 mg/ml、0.5 mg/ml之F-GNS N-methyl pyrrolidone（NMP）溶液塗佈插層於PEDOT:PSS電動傳輸層與P3HT:PCBM主動層間來製備高分子太陽能電池。研究之太陽能電池元件結構為ITO/PEDOT:PSS/F-GNS/P3HT:PC_(71)BM/Ca/Al。由結果顯示，插層四種不同濃度F-GNS之太陽能電池之短路電流密度與光電轉換效率皆比未插層F-GNS之電池高。其中以濃度0.1 mg/ml F-GNS製備之電池具有最佳提升效果，此電池具有最高的短路電流密度7.45 mA/cm^2與最高光電轉換效率3.03％，與未插層F-GNS之電池比較，短路電流密度與光電轉換效率分別提升了16％與31％。

關鍵字

高分子太陽能電池；官能化石墨烯；光電轉換效率

並列摘要

We prepared graphene oxide (GO) by a modified Hummer's method, and synthesized octylamine functionalized graphene (F-GNS) using long-chain octylamine as the functionalization agent. We investigated the effect of incorporating F-GNS layer between poly (ethylene dioxythiophene) (PEDOT)-polystyrene sulfonic acid (PSS) (PEDOT:PSS) hole transfer layer (HTL) and active layer (P3HT:PC_(71)BM =1:1 weight ratio) on the photovoltaic performance. The cell structure was glass/ITO/PEDOT:PSS/F-GNS/P3HT:PC_(71)BM/Ca/Al. Four concentrations of F-GNS N-methyl pyrrolidone (NMP ) solution were 0.05、0.1、0.3 and 0.5 mg/ml. From these results, we found that the short circuit current density (J_(sc)), and power conversion efficiency (PCE) of the cells with F-GNS are always higher than those of cell without F-GNS. The cell with 0.1 mg/ml F-GNS layer has the highest J_(sc) 7.45 mA/cm^2 and PCE 3.03%. The increases of J_(sc) and PCE were 16% and 31%, when compared to the cell without F-GNS, respectively.

並列關鍵字

polymer solar cell ； functionalized graphene ； power conversion efficiency

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