体异质结有机太阳能电池性能提高的研究  

Investigation on Performance Enhancement of Bulk Heterojunction Organic Solar Cells

作　　者：苏梦蟾[1] 衣立新[1] 汪洋[2,3] 时玉萌[1] 梁春军[1] 

机构地区：[1]北京交通大学光电子技术研究所,发光与光信息技术教育部重点实验室,北京100044 [2]兰州交通大学光电技术与智能控制教育部重点实验室,甘肃兰州730070 [3]浙江理工大学理学院,浙江杭州310018

出　　处：《光谱学与光谱分析》2008年第4期740-744,共5页Spectroscopy and Spectral Analysis

基　　金：北京市自然科学基金项目(3062016);兰州交通大学光电技术与智能控制教育部重点实验室开放课题资助

摘　　要：制备了四种不同结构的有机太阳能电池器件,器件1ITO/LiF/PEDOT∶PSS/MEH-PPV/C60/Al、器件2ITO/PEDOT∶PSS/MEH-PPV/C60/Al、器件3ITO/LiF/PEDOT∶PSS/MEH-PPV∶C60/C60/Al和器件4ITO/PEDOT∶PSS/MEH-PPV∶C60/C60/Al。测量了它们的电流-电压特性,结果显示在ITO和PEDOT∶PSS之间插入一薄层LiF使得器件性能得到较大提高。其器件1的JSC和FF比器件2的提高了74%和31%;器件3的JSC比器件4的提高了约40%。这主要是由于LiF层有效地抑制了空穴向阳极的传输,并且LiF层在ITO和PEDOT:PSS之间形成了良好的界面特性。因此,这种结构上的改进有效地提高了有机太阳能电池的性能。Four organic solar cells with the different structures were fabricated. The structures are Devicel ITO/LiF/PEDOT ： PSS/MEH-PPV/C60/Al, Device 2 ITO/PEDOT ： PSS/MEH-PPV/C60/Al, Device 3 ITO/LiF/PEDOT ： PSS/MEH-PPV ： C60/C60/Al and Device 4 ITO/PEDOT ： PSS/MEH-PPV ： C60/C60/Al. Then we compared the current-voltage （I-V） characteristics of these devices and found that the insertion of a thin LiF layer between the ITO electrode and the PET）OT ： PSS layer resulted in much improved device performance. The short-circuit current density （Jsc） and fill factor （FF） of Device 1 were enhanced by 74 % and 3 1%, respectively as compared to those of Device 2. The short-circuit current density （Jsc） of Device 3 is about 1.4 times as large as that of Device 4. The increased solar cell performance mostly can be attributed to the fact that the hole transport to the anode can be effectively suppressed by a thin LiF layer, and the thin LiF layer between the ITO electrode and the PEDOT ： PSS layer can form better interface properties. Hence, such change in structure of solar cells improves the performance of the organic solar cells effectively.

关 键 词：有机太阳能电池 氟化锂 短路电流密度(JSC) 开路电压(VOC) 体异质结 填充因子(FF) 

分 类 号：TM914.4[电气工程—电力电子与电力传动]