銀奈米粒子摻入電洞傳輸層提升高分子太陽能電池之光電轉換效率

Silver Nanodisks Doped in Hole Transport Layer to Enhance the Efficiency of Polymer Solar Cells

歐珍方(Cheng-Fang Ou) ； 王玉慧(Yu-Hui Wang)

《中正嶺學報》 44卷2期 (2015/11) Pp. 61-72

摘要

銀奈米粒子能夠引起局部表面電漿共振效應（LSPR, localized surface Plasmon resonance）來提升光電流。我們將粒徑50至80 nm的圓盤形銀奈米粒子（silver nanodisk）摻入高分子太陽能電池的電洞傳輸層（PEDOT：PSS）來提高電池的性能。電池的結構為ITO/PEDOT：PSS：Ag NPs/P3HT：PC_(61)BM/Ca/Al，摻雜之銀奈米溶液體積比為5%、10%、15%與20%。由結果發現，電池的短路電流密度（J_(sc)）、填充因子（FF）與光電轉換效率（PCE）隨著銀奈米摻雜量增加而增加，摻雜量增至15%時提升至最高值，J_(sc)由未摻雜時之7.12 mA/cm^2增加至8.80 mA/cm^2，提升了23.6%，填充因子由0.49增加至0.65，提升了32.7%，PCE由2.23%增加至3.59%，提升了61.0%。由結果顯示於PEDOT：PSS電洞傳輸層摻雜銀奈米粒子提升太陽能電池的光電特性，可歸因於銀奈米粒子的摻雜能夠增加激子（exciton）產生的速率及激子分離之機率，因此提升了電池的J_(sc)與FF。

關鍵字

銀奈米粒子 ； 高分子太陽能電池 ； 電洞傳輸層 ； 光電轉換效率

並列摘要

The silver nanoparticles (Ag NPs) can induce localized surface plasmon resonance (LSPR) to enhance the photocurrent of a polymer solar cell. We use the Ag nanoparticles to enhance the power conversion efficiency of the polymer solar cells. The silver nanodisks were synthesized and added into the poly (ethylene dioxythiophene) (PEDOT)-polystyrene sulfonic acid (PSS) (PEDOT:PSS) hole transport layer (HTL). The cell structure was ITO/PEDOT:PSS:Ag NPs/P3HT:PCBM/Ca/Al. The short-circuit current density (J_(sc)), fill factor (FF) and power conversion efficiency (PCE) of cells increased with increasing silver nanoparticles volume ratio from 5% to 15%. The cell with 15% volume ratio of Ag NPs in the HTL exhibited the highest J_(sc) of 8.80 mA/cm^2, an increase of 23.6%, the highest FF of 0.65, an increase of 32.7%, and the highest PCE of 3.59%, an increase of 61.0%, compared to the reference cell without Ag NPs. The addition of Ag NPs increased the rate of exciton generation and the probability of exciton dissociation, thereby enhancing the J_(sc) and FF.

並列關鍵字

silver nanoparticles ； polymer solar cell ； hole transport layer ； power conversion efficiency