https://scholars.lib.ntu.edu.tw/handle/123456789/504219
標題: | Terthiophene-C60 dyads as donor/acceptor compatibilizers for developing highly stable P3HT/PCBM bulk heterojunction solar cells | 作者: | Raja, R. Liu, W.-S. Hsiow, C.-Y. Rwei, S.-P. WEN-YEN CHIU LEE-YIH WANG |
公開日期: | 2015 | 出版社: | Royal Society of Chemistry | 卷: | 3 | 期: | 27 | 起(迄)頁: | 14401-14408 | 來源出版物: | Journal of Materials Chemistry A | 摘要: | Forming nano-scale interpenetrating networks in electron donor/acceptor blends via phase-separation tuning and maintaining their optimal morphology are of paramount importance for the favorable performance and operational lifetime of bulk heterojunction (BHJ) polymer solar cells. In this work, two fulleropyrrolidine derivatives that bear π-conjugated terthiophene (3T) and two hexyl (H) or ethylhexyl (EH) chains, abbreviated as 3T-H-C60 and 3T-EH-C60, are separately used as a compatibilizer of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). The effect of the loading of such an agent on the photovoltaic properties of solar devices and the morphological stability of the P3HT/PCBM blend was examined. The substitution of PCBM with a tiny amount of 3T-H-C60 or 3T-EH-C60 apparently enhances the short-circuit current density, reflecting the formation of small PCBM clusters within the P3HT matrix. More importantly, optical microscopy, transmission electron microscopy and photoluminescence measurements verify that the presence of 1 wt% 3T-H-C60 or 3 wt% 3T-EH-C60 effectively hinders the thermal motion of PCBM molecules to form micro-scale clusters, leading to an extremely stable morphology even under long-term exposure to elevated temperatures. Accordingly, the power conversion efficiencies of P3HT/PCBM:3T-H-C60 and P3HT/PCBM:3T-EH-C60 devices remain very steady during prolonged aging at 130 °C. This work provides valuable guidelines for the design of an effective compatibilizer for thermally stable polymer/fullerene BHJ solar cells. © 2015 The Royal Society of Chemistry. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/504219 | ISSN: | 20507488 | DOI: | 10.1039/c5ta02953h | SDG/關鍵字: | Butyric acid; Compatibilizers; Heterojunctions; High resolution transmission electron microscopy; Interpenetrating polymer networks; Light transmission; Nanotechnology; Phase separation; Photovoltaic effects; Polymer solar cells; Solar power generation; Transmission electron microscopy; Bulk heterojunction (BHJ); Bulk heterojunction solar cells; Fulleropyrrolidine derivatives; Morphological stability; Photoluminescence measurements; Power conversion efficiencies; Thermally stable polymers; [6 ,6]-phenyl-C61-butyric acid methyl esters; Solar cells |
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