Effects of ultraviolet soaking on surface electronic structures of solution processed ZnO nanoparticle films in polymer solar cells

被引：50

作者：

Bao, Qinye ^{[1
]}

Liu, Xianjie ^{[1
]}

Xia, Yuxin ^{[1
]}

Gao, Feng ^{[1
]}

Kauffmann, Louis-Dominique ^{[2
]}

Margeat, Olivier ^{[3
]}

Ackermann, Jorg ^{[3
]}

Fahlman, Mats ^{[1
]}

机构：

[1] Linkoping Univ, Dept Phys Chem & Biol, SE-58183 Linkoping, Sweden

[2] GenesInk, F-13790 Rousset, France

[3] Aix Marseille Univ, CNRS, CINaM UMR 7325, F-13288 Marseille, France

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2014年 / 2卷 / 41期

基金：

瑞典研究理事会;

关键词：

ZINC-OXIDE; THIN-FILM; CONJUGATED POLYELECTROLYTE; ORGANIC PHOTOVOLTAICS; HIGHLY EFFICIENT; INTERFACE; LAYER; INTERLAYER; BLENDS; CONDUCTIVITY;

D O I：

10.1039/c4ta02695k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We systematically show the effect of UV-light soaking on surface electronic structures and chemical states of solution processed ZnO nanoparticle (ZnONP) films in UHV, dry air and UV-ozone. UV exposure in UHV induces a slight decrease in work function and surface-desorption of chemisorbed oxygen, whereas UV exposure in the presence of oxygen causes an increase in work function due to oxygen atom vacancy filling in the ZnO matrix. We demonstrate that UV-light soaking in combination with vacuum or oxygen can tune the work function of the ZnONP films over a range exceeding 1 eV. Based on photovoltaic performance and diode measurements, we conclude that the oxygen atom vacancy filling occurs mainly at the surface of the ZnONP films and that the films consequently retain their n-type behavior despite a significant increase in the measured work function.

引用

页码：17676 / 17682

页数：7

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