Long-lived photoinduced polaron formation in conjugated polyelectrolyte-fullerene assemblies

被引：56

作者：

Huber, Rachel C. ^{[1
]}

Ferreira, Amy S. ^{[1
]}

Thompson, Robert ^{[1
]}

Kilbride, Daniel ^{[1
]}

Knutson, Nicholas S. ^{[1
]}

Devi, Lekshmi Sudha ^{[1
]}

Toso, Daniel B. ^{[2
,3
]}

Challa, J. Reddy ^{[1
]}

Zhou, Z. Hong ^{[2
,3
,4
]}

Rubin, Yves ^{[1
]}

Schwartz, Benjamin J. ^{[1
,4
]}

Tolbert, Sarah H. ^{[1
,4
,5
]}

机构：

[1] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA

[2] Univ Calif Los Angeles, Dept Microbiol Immunol & Mol Genet, Los Angeles, CA 90095 USA

[3] Univ Calif Los Angeles, Biomed Engn Program, Los Angeles, CA 90095 USA

[4] Univ Calif Los Angeles, Calif NanoSyst Inst CNSI, Los Angeles, CA 90095 USA

[5] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

来源：

SCIENCE | 2015年 / 348卷 / 6241期

基金：

美国国家科学基金会; 美国国家卫生研究院;

关键词：

CHARGE-TRANSFER; BULK-HETEROJUNCTION; SOLAR-CELLS; POLYMER; STATE; DYNAMICS; EXCITONS;

D O I：

10.1126/science.aaa6850

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：

The efficiency of biological photosynthesis results from the exquisite organization of photoactive elements that promote rapid movement of charge carriers out of a critical recombination range. If synthetic organic photovoltaic materials could mimic this assembly, charge separation and collection could be markedly enhanced. We show that micelle-forming cationic semiconducting polymers can coassemble in water with cationic fullerene derivatives to create photoinduced electron-transfer cascades that lead to exceptionally long-lived polarons. The stability of the polarons depends on the organization of the polymer-fullerene assembly. Properly designed assemblies can produce separated polaronic charges that are stable for days or weeks in aqueous solution.

引用

页码：1340 / 1343

页数：4

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