Influence of solution heating on the properties of PEDOT:PSS colloidal solutions and impact on the device performance of polymer solar cells

被引：37

作者：

Friedel, Bettina ^{[1
,2
]}

Brenner, Thomas J. K. ^{[2
]}

McNeill, Christopher R. ^{[2
]}

Steiner, Ullrich ^{[2
]}

Greenham, Neil C. ^{[2
]}

机构：

[1] Graz Univ Technol, Inst Solid State Phys, A-8010 Graz, Austria

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

来源：

ORGANIC ELECTRONICS | 2011年 / 12卷 / 10期

基金：

英国工程与自然科学研究理事会;

关键词：

Organic solar cell; PEDOT:PSS; Phase transition; Particle size; INDIUM-TIN-OXIDE; PHOTOELECTRON-SPECTROSCOPY; THIN-FILMS; POLY(STYRENE SULFONATE); WORK FUNCTION; PSS; CONDUCTIVITY; STABILITY; LAYER; POLYELECTROLYTES;

D O I：

10.1016/j.orgel.2011.07.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the effects of temperature variation on colloidal solutions of the electrode polymer poly(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid) (PEDOT:PSS) and its consequences for photovoltaic devices using conjugated polymer blends as the photoactive material. By variation of the PEDOT:PSS solution temperature between 20 and 90 degrees C we observed reversible temperature-dependent change in size of the PEDOT:PSS particles. This process is associated with temperature and concentration dependent phase transitions of the PSS electrolyte chains. We found optimum device performance, in particular high quantum efficiency and power conversion efficiency for solar cells, with PEDOT:PSS layers produced from 70 degrees C solutions. After consideration of film morphology, particle size, conductivity and work function, we conclude that improved device performance originates from enhanced conductivity in films deposited from heated solutions. While film conductivity increases mo\notonically with solution temperature, devices produced using solution temperatures greater than 70 degrees C suffer from the increased work function of the PEDOT:PSS layer. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1736 / 1745

页数：10

共 45 条

[1] Nonequilibrium Polymer Rheology in Spin-Cast Films [J].