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Stabilization of poly(3-hexylthiophene)/PCBM morphology by hydroxyl group end-functionalized P3HT and its application to polymer solar cells |
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| Authors: | Yi-Hao ChenPing-Tsung Huang Keng-Ching LinYu-Jui Huang Chin-Ti Chen |
| Affiliation: | a Department of Chemistry, Fu Jen Catholic University, Taipei 24205, Taiwan, ROC b Department of Physics, Fu Jen Catholic University, Taipei 24205, Taiwan, ROC c Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan, ROC |
| Abstract: | A new concept to stabilize the morphology of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) blend through H-bond formation by using a hydroxyl group end-functionalized P3HT (HOC-P3HT-COH) as a compatibilizer is presented. Domain size of the PCBM crystals in the annealed P3HT/PCBM film is diminished with addition of HOC-P3HT-COH. Surface roughness of the P3HT/PCBM film also becomes smoother with addition of HOC-P3HT-COH. Thermal stability of solar cell device is improved significantly through the H-bond formation between HOC-P3HT-COH and PCBM. A high performance and thermal stable polymer solar cell with 4.06% power conversion efficiency under AM1.5G irradiation is fabricated with 5% HOC-P3HT-COH in P3HT/PCBM layer. |
| Keywords: | Poly(3-hexylthiophene) PCBM End-functionalized P3HT H-bond Compatibilizer |
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