聚(苯撑乙炔-苯并噻二唑)共聚物光伏器件性能

Characterization and photovoltaic devices performance of poly（phenylenevinylene-alt-benzothiadiazole）

摘要: 分别制备了ITO/PEDOT-PSS/C8-PPE-BT+PCBM(1/4,w/w)/Ba/A l、ITO/PEDOT-PSS/C8-PPE-BT+MEH-PPV(1/1,w/w)/Ba/A l两种本体异质结光伏器件,发现这两种器件均表现出光伏效应。其中PPE-BT+PCBM器件表现出较高的能量转换效率达到0.084%,EQE为2.7%,比单层C8-PPE-BT器件的EQE提高了23倍。但当C8-PPE-BT与给体MEH-PPV构成器件时,其能量转换效率较差,分别为3.67×10^-3%和2.54×10^-3%。说明电子在C8-PPE-BT中的迁移率较小,尽管存在光诱导的电荷转移,但在未到达电极就被捕获。

Abstract: Two photovoltaic devices were fabricated with configurations of ITO/PEDOT-PSS/C8-PPE-BT + PCBM（1/4,w/w）/Ba/Al;ITO/PEDOTPSS/C8-PPE-BT + MEH-PPV（1/1,w/w）/Ba/Al,respectively.Both devices show photovoltaic effect.Device based on PPE-BT and PCBM shows the highest η_e of 0.084% and EQE of 2.7% which is enhanced by a factor of 23 compared with that of the pure C8-PPE-BT device.When PPE-BT is blended with MEH-PPV donor,η_e is 3.67×10^-3%,which is lower.Because the electrons mobility are inferior than holes within the copolymers and electrons would be trapped before reaching the electrode.