Increased efficiency in small molecule organic photovoltaic cells through electrode modification with self-assembled monolayers

被引：72

作者：

Beaumont, N. ^{[1
]}

Hancox, I. ^{[1
]}

Sullivan, P. ^{[1
]}

Hatton, R. A. ^{[1
]}

Jones, T. S. ^{[1
]}

机构：

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

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2011年 / 4卷 / 05期

基金：

英国工程与自然科学研究理事会;

关键词：

HETEROJUNCTION SOLAR-CELLS; ITO ELECTRODES; INJECTION; IONIZATION; DIODES; ENERGY; C-60;

D O I：

10.1039/c1ee00005e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report that through the incorporation of polar self-assembled monolayers (SAMs) at the indium tin oxide (ITO)/donor interface in chloroaluminium phthalocyanine (ClAlPc)/C(60) discrete heterojunction organic photovoltaic (OPV) cells, the power conversion efficiency can be dramatically increased. This enhanced performance is due to better alignment between the hole-extracting electrode Fermi level and the highest occupied molecular orbital (HOMO) of the ClAlPc donor, as well as an improved surface compatibility which provides a more optimised electrode/donor interface. Optimised cells demonstrate an increase of similar to 85% in open circuit voltage which results in a near three-fold increase in power conversion efficiency from 1.3% to 3.3% under 1 sun illumination. Comparative studies are made using cells based on two other organic donor materials, copper phthalocyanine (CuPc) and boron sub-phthalocyanine (SubPc).

引用

页码：1708 / 1711

页数：4

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