Direct Optical Generation of Long-Range Charge-Transfer States in Organic Photovoltaics

被引：59

作者：

Ma, Haibo ^{[1
]}

Troisi, Alessandro ^{[2
,3
]}

机构：

[1] Nanjing Univ, Key Lab Mesoscop Chem MOE, Sch Chem & Chem Engn, Inst Theoret & Computat Chem, Nanjing 210093, Jiangsu, Peoples R China

[2] Univ Warwick, Dept Chem, Coventry CV4 7AL, W Midlands, England

[3] Univ Warwick, Ctr Sci Comp, Coventry CV4 7AL, W Midlands, England

来源：

ADVANCED MATERIALS | 2014年 / 26卷 / 35期

基金：

欧洲研究理事会; 中国国家自然科学基金;

关键词：

OPEN-CIRCUIT VOLTAGE; RENORMALIZED EXCITONIC METHOD; SOLAR-CELLS; SEPARATION; DISSOCIATION; ENERGY; INTERFACES; POLYMER; HETEROJUNCTIONS; DELOCALIZATION;

D O I：

10.1002/adma.201402294

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Direct optical excitation of long-range charge-transfer (CT) states in organic photovoltaics is shown to be feasible, a fact that is ascribed to the very low but non-vanishing oscillator strength of each individual transition and the much higher density of states (DOS) as compared with their short-range counterparts. This finding provides a new framework to interpret the low-energy absorption spectra of photovoltaic devices and to correlate this property with the optoelectronic conversion process in working devices.

引用

收藏

页码：6163 / +

页数：6

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