1401696-22-7Relevant academic research and scientific papers
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
Chen, Yung-Lung,Kao, Wei-Shun,Tsai, Che-En,Lai, Yu-Ying,Cheng, Yen-Ju,Hsu, Chain-Shu
supporting information, p. 7702 - 7704 (2013/09/02)
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%.
Synthesis of a new ladder-type benzodi(cyclopentadithiophene) arene with forced planarization leading to an enhanced efficiency of organic photovoltaics
Chen, Yung-Lung,Chang, Chih-Yu,Cheng, Yen-Ju,Hsu, Chain-Shu
, p. 3964 - 3971,8 (2020/09/16)
We have developed a new heptacyclic benzodi(cyclopentadithiophene) (BDCPDT) unit, where 3,7-positions of the central benzo[1,2-b:4,5-b′]dithiophenes (BDT) subunit are covalently rigidified with 3-positons of the two external thiophenes by two carbon bridges, forming two external CPDT rings that share two thiophene rings with the central BDT core. The distannyl-BDCPDT building block was copolymerized with 1,3-dibromo-thieno[3,4-c]pyrrole-4,6-dione (TPD) by Stille polymerization to afford a new alternating donor-acceptor copolymer PBDCPDT-TPD. The implementation of forced planarization greatly suppresses the interannular twisting to extend the effective conjugated length and preserve the interactions between the donor and acceptor segments. The device using the PBDCPDT-TPD/PC71BM (1:3 in wt%) blend processed with dimethyl sulfoxide as an additive delivered a marked PCE of 6.6% which represents a significant enhancement compared to the device using the corresponding nonfused polymer analogue with a PCE of 0.2%.
