用于高效双层异质结光伏器件的可溶性 P3HT 接枝石墨烯。

Soluble P3HT-grafted graphene for efficient bilayer-heterojunction photovoltaic devices.

机构信息

Department of Chemical Engineering, Case Western Reserve University, Cleveland, Ohio 44106, USA.

出版信息

ACS Nano. 2010 Oct 26;4(10):5633-40. doi: 10.1021/nn101671t.

PMID:20831214

Abstract

CH(2)OH-terminated regioregular poly(3-hexylthiophene) (P3HT) was chemically grafted onto carboxylic groups of graphene oxide (GO) via esterification reaction. The resultant P3HT-grafted GO sheets (G-P3HT) are soluble in common organic solvents, facilitating the structure/property characterization and the device fabrication by solution processing. The covalent linkage and the strong electronic interaction between the P3HT and graphene moieties in G-P3HT were confirmed by spectroscopic analyses and electrochemical measurements. A bilayer photovoltaic device based on the solution-cast G-P3HT/C(60) heterostructures showed a 200% increase of the power conversion efficiency (η = 0.61%) with respect to the P3HT/C(60) counterpart under AM 1.5 illumination (100 mW/cm(2)).

摘要

通过酯化反应，将 CH(2)OH 端基的规则区域多（3-己基噻吩）（P3HT）化学接枝到氧化石墨烯（GO）的羧基上。所得的 P3HT 接枝氧化石墨烯片（G-P3HT）可溶于常见有机溶剂，便于通过溶液处理进行结构/性能表征和器件制造。通过光谱分析和电化学测量证实了 G-P3HT 中 P3HT 和石墨烯部分之间的共价键合和强电子相互作用。基于溶液浇铸的 G-P3HT/C(60) 异质结构的双层光伏器件在 AM 1.5 照明（100 mW/cm(2)）下，与 P3HT/C(60) 相比，功率转换效率（η = 0.61%）提高了 200%。