Noise-induced quantum coherence drives photo-carrier generation dynamics at polymeric semiconductor heterojunctions

被引：115

作者：

Bittner, Eric R. ^{[1
,2
,3
]}

Silva, Carlos ^{[2
,3
]}

机构：

[1] Univ Houston, Dept Chem & Phys, Houston, TX 77204 USA

[2] Univ Montreal, Dept Phys, Montreal, PQ H3C 3J7, Canada

[3] Univ Montreal, Regrp Quebecois Mat Pointe, Montreal, PQ H3C 3J7, Canada

来源：

NATURE COMMUNICATIONS | 2014年 / 5卷

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

NANOSTRUCTURED ORGANIC PHOTOVOLTAICS; DONOR-ACCEPTOR COPOLYMERS; HOT EXCITON DISSOCIATION; CHARGE SEPARATION; CONJUGATED POLYMERS; ELECTRON-TRANSFER; SOLAR-CELLS; HEAT ENGINE; ENERGY; DELOCALIZATION;

D O I：

10.1038/ncomms4119

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：

Here we report on an exciton/lattice model of the electronic dynamics of primary photo excitations in a polymeric semiconductor heterojunction that includes both polymer pi-stacking, energetic disorder and phonon relaxation. Our model indicates that that in polymer/fulerene heterojunction systems, resonant tunnelling processes brought about by environmental fluctuations couple photo excitations directly to photocurrent producing charge-transfer states on <100 fs time scales. Moreover, we find this process to be independent of the location of energetic disorder in the system, and hence we expect exciton fission via resonant tunnelling to polarons to be a ubiquitous feature of these systems.

引用

页数：8

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