Tailor-Made Additives for Morphology Control in Molecular Bulk-Heterojunction Photovoltaics

被引：41

作者：

Graham, Kenneth R. ^{[1
,2
]}

Stalder, Romain ^{[1
,2
]}

Wieruszewski, Patrick M. ^{[1
,2
]}

Patel, Dinesh G. ^{[1
,2
]}

Salazar, Danielle H. ^{[1
,2
]}

Reynolds, John R. ^{[1
,2
,3
,4
]}

机构：

[1] Univ Florida, Dept Chem, George & Josephine Butler Polymer Res Lab, Gainesville, FL 32611 USA

[2] Univ Florida, Ctr Macromol Sci & Engn, Gainesville, FL 32611 USA

[3] Georgia Inst Technol, Sch Mat Sci & Engn, Sch Chem & Biochem, Atlanta, GA 30322 USA

[4] Georgia Inst Technol, Ctr Organ Photon & Elect, Atlanta, GA 30322 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2013年 / 5卷 / 01期

关键词：

morphology control; tailor-made additive; bulk-heterojunction; organic photovoltaic; POLYMER SOLAR-CELLS; OPEN-CIRCUIT VOLTAGE; CRYSTAL-GROWTH; PHASE-SEPARATION; INHIBITORS; EFFICIENCY; POLY(3-HEXYLTHIOPHENE); DITHIENOGERMOLE; POLYTHIOPHENE; ENHANCEMENT;

D O I：

10.1021/am301944g

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Tailor-made additives, which are molecules that share the same molecular structure as a parent molecule with only slight structural variations, have previously been demonstrated as a useful means to control crystallization dynamics in solution. For example, tailor-made additives can be added to solutions of a crystallizing parent molecule to alter the crystal growth rate, size, and shape. We apply this strategy as a means to predictably control morphology in molecular bulk-heterojunction (BHJ) photovoltaic cells. Through the use of an asymmetric oligomer substituted with a bulky triisobutylsilyl end group, the morphology of BHJ blends can be controlled resulting in a near doubling (from 1.3 to 2.2%) in power conversion efficiency. The use of tailor-made additives provides promising opportunities for controlling crystallization dynamics, and thereby film morphologies, for many organic electronic devices such as photovoltaics and field-effect transistors.

引用

页码：63 / 71

页数：9