Organic bulk heterojunction photovoltaic devices based on polythiophene-graphene composites.
Organic bulk heterojunction photovoltaic devices based on polythiophene-graphene composites.
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DOI：
10.1021/am301204g
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发表时间：
2012-08
影响因子：
9.5
通讯作者：
M. Stylianakis;E. Stratakis;E. Koudoumas;E. Kymakis;S. H. Anastasiadis
中科院分区：
文献类型：
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作者：
M. Stylianakis;E. Stratakis;E. Koudoumas;E. Kymakis;S. H. Anastasiadis
利用氧化石墨烯的功能性羧基，用异硫氰酸苯酯（PITC）处理氧化石墨（GO），合成了溶液处理的石墨烯内容物。 GO是通过天然石墨粉末的氧化制备的，并通过超声处理进行膨胀，以剥离单层或/和多层氧化石墨烯片。功能化氧化石墨烯 GO-PITC 可以分散在聚（3-己基噻吩）（P3HT）中，并可用作本体异质结聚合物光伏电池中的电子受体。当P3HT掺杂GO-PITC时，P3HT的光致发光发生了很大的猝灭，表明电子从P3HT到GO-PITC的强烈转移。 GO-PITC 作为电子受体材料在聚（3-己基噻吩）（P3HT）体异质结光伏器件中的应用得到了证明，与原始 P3HT 相比，功率转换效率提高了 2 个数量级。
A solution-processed graphene content was synthesized by treatment of graphite oxide (GO) with phenyl isothiocyanate (PITC) by taking advantage of the functional carboxyl groups of graphene oxide. The GO was prepared by the oxidation of natural graphite powder and was expanded by ultrasonication in order to exfoliate single or/and few-layered graphene oxide sheets. The functionalized graphene oxide, GO-PITC, can be dispersed within poly-(3-hexylthiophene) (P3HT) and can be utilized as the electron acceptor in bulk heterojunction polymer photovoltaic cells. When P3HT is doped with GO-PITC, a great quenching of the photoluminescence of the P3HT occurred, indicating a strong electron transfer from the P3HT to the GO-PITC. The utilization of GO-PITC as the electron acceptor material in poly-(3-hexylthiophene) (P3HT) bulk heterojunction photovoltaic devices was demonstrated, yielding in a power conversion efficiency enhancement of 2 orders of magnitude compared with that of pristine P3HT.