Effect of mixture ratio on the performance of MDMO-PPV:PCBM bulk heterojunction solar cells: A numerical study

✍ Scribed by Ronghua Li; Yingquan Peng; Chaozhu Ma; Runsheng Wang; Ying Wang; Hongwei Xie; Ting Yang; Jipeng Xie; Shenggang Yan; Jiawang Zhang

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 219 KB
• Volume: 172
• Category: Article
• ISSN: 0921-5107
• DOI: 10.1016/j.mseb.2010.06.013

✦ Synopsis

This paper presents a systematic numerical simulation of variation of blending ratio and cathode work function dependence of poly(2-methoxy-5-(3 ,7 -dimethyloctyloxy)-para-phenylene vinylene) (MDMO-PPV):phenyl-C61-butyric acid methyl ester (PCBM) bulk heterojunction (BHJ) solar cells performance for MDMO-PPV concentration between 0 and 100 mol percentage and cathode work function interval 3.7-4.7 eV. From our studies it became evident that the open-circuit voltage (V oc ), short-circuit current (J sc ) and fill factor (FF) decrease with the increasing cathode work function. It is shown that J sc increases almost linearly with the increasing MDMO-PPV concentration from 0 to 60 mol%, and then decreases. With the increasing of MDMO-PPV concentration, FF augments gradually to 76.56% and then plunges to 19.53%. It is also demonstrated that when MDMO-PPV is larger than 45 mol%, the enhancing MDMO-PPV mol percentage is detrimental for the device performance.