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

Qinye Bao; Xianjie Liu; Yuxin Xia; Feng Gao; Louis Dominique Kauffmann; Olivier Margeat; Jörg Ackermann; Mats Fahlman

doi:10.1039/c4ta02695k

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

Qinye Bao^*, Xianjie Liu, Yuxin Xia, Feng Gao, Louis Dominique Kauffmann, Olivier Margeat, Jörg Ackermann, Mats Fahlman

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

50 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	17676-17682
Number of pages	7
Journal	Journal of Materials Chemistry A
Volume	2
Issue number	41
DOIs	https://doi.org/10.1039/c4ta02695k
State	Published - 7 Nov 2014
Externally published	Yes

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@article{53bde9ace5ab479abc608a7f7b7580d9,

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

abstract = "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.",

author = "Qinye Bao and Xianjie Liu and Yuxin Xia and Feng Gao and Kauffmann, \{Louis Dominique\} and Olivier Margeat and J{\"o}rg Ackermann and Mats Fahlman",

note = "Publisher Copyright: {\textcopyright} the Partner Organisations 2014.",

year = "2014",

month = nov,

day = "7",

doi = "10.1039/c4ta02695k",

language = "英语",

volume = "2",

pages = "17676--17682",

journal = "Journal of Materials Chemistry A",

issn = "2050-7488",

publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Effects of ultraviolet soaking on surface electronic structures of solution processed ZnO nanoparticle films in polymer solar cells

AU - Bao, Qinye

AU - Liu, Xianjie

AU - Xia, Yuxin

AU - Gao, Feng

AU - Kauffmann, Louis Dominique

AU - Margeat, Olivier

AU - Ackermann, Jörg

AU - Fahlman, Mats

PY - 2014/11/7

Y1 - 2014/11/7

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/84907674001

U2 - 10.1039/c4ta02695k

DO - 10.1039/c4ta02695k

M3 - 文章

AN - SCOPUS:84907674001

SN - 2050-7488

VL - 2

SP - 17676

EP - 17682

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

IS - 41

ER -

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

Abstract

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