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Impact of Highly-Crystalline, Isoindigo-Based Small-Molecular Additives for Enhancing Performance of All-Polymer Solar Cells

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By Han-Hee Cho, Robert Younts, Wonho Frank Lee, Gibok Han
| Royal Society of Chemistry Verified
We have developed a simple yet versatile approach for enhancing the performance of all-polymer solar cells (all-PSCs) using highly crystalline small-molecular additive, 6,6’-dithiopheneisoindigo (DTI). The DTI additive in a blend of PTB7-Th donor and P(NDI2HD-T) acceptor enhances the power conversion efficiency of all-PSCs from 5.9 to 6.8%. Based on the analyses of the electrical, optical, and structural properties of all-PSCs, it is suggested that DTI additives promote tighter ?-?
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