Long-range exciton transport in conjugated polymer nanofibers prepared by seeded growth

被引：327

作者：

Jin, Xu-Hui ^{[1
]}

Price, Michael B. ^{[2
]}

Finnegan, John R. ^{[1
]}

Boott, Charlotte E. ^{[1
]}

Richter, Johannes M. ^{[2
]}

Rao, Akshay ^{[2
]}

Menke, Matthew ^{[2
]}

Friend, Richard H. ^{[2
]}

Whittell, George R. ^{[1
]}

Manners, Ian ^{[1
]}

机构：

[1] Univ Bristol, Sch Chem, Bristol BS8, Avon, England

[2] Univ Cambridge, Dept Phys, Cavendish Lab, Cambridge CB3 0HE, England

来源：

SCIENCE | 2018年 / 360卷 / 6391期

基金：

英国工程与自然科学研究理事会;

关键词：

ORGANIC SEMICONDUCTORS; ENERGY-TRANSFER; DIFFUSION LENGTH; PHOTOPHYSICAL PROPERTIES; ROOM-TEMPERATURE; MIGRATION; MICELLES; POLYFLUORENE; ARCHITECTURE; ABSORPTION;

D O I：

10.1126/science.aar8104

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Easily processed materials with the ability to transport excitons over length scales of more than 100 nanometers are highly desirable for a range of light-harvesting and optoelectronic devices. We describe the preparation of organic semiconducting nanofibers comprising a crystalline poly(di-n-hexylfluorene) core and a solvated, segmented corona consisting of polyethylene glycol in the center and polythiophene at the ends. These nanofibers exhibit exciton transfer from the core to the lower-energy polythiophene coronas in the end blocks, which occurs in the direction of the interchain pi-pi stacking with very long diffusion lengths (>200 nanometers) and a large diffusion coefficient (0.5 square centimeters per second). This is made possible by the uniform exciton energetic landscape created by the well-ordered, crystalline nanofiber core.

引用

页码：897 / 900

页数：5

共 33 条

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