A new ladder-type benzodi(cyclopentadithiophene)-based donor–acceptor polymer and a modified hole-collecting PEDOT:PSS layer to achieve tandem solar cells with an open-circuit voltage of 1.62 V
2013
Chen, Yung-Lung | Kao, Wei-Shun | Tsai, Che-En | Lai, Yu-Ying | Cheng, Yen-Ju | Hsu, Chain-Shu
We have developed a new ladder-type conjugated polymer PBDCPDT–FBT and a robust interconnecting layer (ICL) integrating a hole-collecting m-PEDOT:PSS layer with an electron-collecting ZnO layer. The inverted device using PBDCPDT–FBT exhibited a high power conversion efficiency (PCE) of 5.76% with a Vₒc of 0.81 V, a Jₛc of 12.82 mA cm⁻², and a FF of 55.5%. The inverted tandem device incorporating the PBDCPDT–FBT and ICL achieves a Vₒc of 1.62 V leading to a PCE of 7.08%.
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