A simultaneous achievement of high performance and extended thermal stability of bulk-heterojunction polymer solar cells using a polythiophene-fullerene block copolymer
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- A simultaneous achievement of high performance and extended thermal stability of bulk-heterojunction polymer solar cells using a polythiophene-fullerene block copolymer
- Yun, Myoung Hee; Kim, Jonggi; Yang, Changduk; Kim, Jin Young
- Atomic force; Bulk heterojunction; Control device; In-phase; Interfacial morphologies; Methyl esters; Poly (3-hexylthiophene); Polymer Solar Cells; Power conversion efficiencies; Simultaneous achievement
- Issue Date
- ELSEVIER SCIENCE BV
- SOLAR ENERGY MATERIALS AND SOLAR CELLS, v.104, no., pp.7 - 12
- We report substantial improvements in efficiency and thermal stability of the poly(3-hexylthiophene):[6.6]-phenyl-C-61-butyric acid methyl ester (PCBM) (P3HT:PCBM) bulk heterojunction (BHJ) system by adding a diblock copolymer P3HT-b-P(St(89)BAz(11))-C-60 (P3HT=poly (3-hexylthiophene), St=styrene, BAz=benzyl aside) as a compatibilizer. Small amounts of the diblock copolymer alter the interfacial morphology between the P3HT and PCBM components, resulting in a noticeable difference in phase segregation of the BHJ films, as evident in atomic force microscopy images. The best performance is observed in the P3HT:PCBM cell with 10% P3HT-b-P(St(89)BAz(11))-C-60, which exhibits substantially improved power conversion efficiency and thermal stability compared to the P3HT:PCBM control device.
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