Improved performance of inverted polymer solar cells by utilizing alcohol-soluble oligofluorenes as efficient cathode interlayers

Yuan Liu; Wenjun Zhang; Yang Zou; Guohua Xie; Junfeng Fang; Chuluo Yang

doi:10.1016/j.orgel.2015.12.025

Improved performance of inverted polymer solar cells by utilizing alcohol-soluble oligofluorenes as efficient cathode interlayers

Yuan Liu
, Wenjun Zhang
, Yang Zou
, Guohua Xie
, Junfeng Fang^*
, Chuluo Yang

^*Corresponding author for this work

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

8 Scopus citations

Abstract

Two star-shaped oligofluorenes with hexakis(fluoren-2-yl)benzene as core are designed and synthesized, namely Tn0 and Tn1. Diethylamino groups are attached to the side chain of fluorene units of Tn0 and Tn1 and enable them alcohol solubility, additional hydrophobic nhexyl chains are grafted on the π-extended fluorene arms of Tn1. Power conversion efficiency (PCE) as high as 8.62% and 8.80% are achieved when utilizing Tn0 and Tn1 as cathode interlayers in inverted polymer solar cells, respectively. The work function of ITO effectively decreased by introducing interlayer, resulting in high Voc of the device, besides, the wetting properties of the interlayers can be tuned by modifying the oligofluorenes with π-extended structure, and the more hydrophobic interlayer will benefit the device performance with enhanced Jsc and FF.

Original language	English
Pages (from-to)	182-190
Number of pages	9
Journal	Organic Electronics
Volume	30
DOIs	https://doi.org/10.1016/j.orgel.2015.12.025
State	Published - Mar 2016
Externally published	Yes

Keywords

Alcohol soluble
Cathode interlayer
Inverted polymer solar cells
Structures and properties

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10.1016/j.orgel.2015.12.025

Cite this

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title = "Improved performance of inverted polymer solar cells by utilizing alcohol-soluble oligofluorenes as efficient cathode interlayers",

abstract = "Two star-shaped oligofluorenes with hexakis(fluoren-2-yl)benzene as core are designed and synthesized, namely Tn0 and Tn1. Diethylamino groups are attached to the side chain of fluorene units of Tn0 and Tn1 and enable them alcohol solubility, additional hydrophobic nhexyl chains are grafted on the π-extended fluorene arms of Tn1. Power conversion efficiency (PCE) as high as 8.62\% and 8.80\% are achieved when utilizing Tn0 and Tn1 as cathode interlayers in inverted polymer solar cells, respectively. The work function of ITO effectively decreased by introducing interlayer, resulting in high Voc of the device, besides, the wetting properties of the interlayers can be tuned by modifying the oligofluorenes with π-extended structure, and the more hydrophobic interlayer will benefit the device performance with enhanced Jsc and FF.",

keywords = "Alcohol soluble, Cathode interlayer, Inverted polymer solar cells, Structures and properties",

author = "Yuan Liu and Wenjun Zhang and Yang Zou and Guohua Xie and Junfeng Fang and Chuluo Yang",

year = "2016",

month = mar,

doi = "10.1016/j.orgel.2015.12.025",

language = "英语",

volume = "30",

pages = "182--190",

journal = "Organic Electronics",

issn = "1566-1199",

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}

TY - JOUR

T1 - Improved performance of inverted polymer solar cells by utilizing alcohol-soluble oligofluorenes as efficient cathode interlayers

AU - Liu, Yuan

AU - Zhang, Wenjun

AU - Zou, Yang

AU - Xie, Guohua

AU - Fang, Junfeng

AU - Yang, Chuluo

PY - 2016/3

Y1 - 2016/3

N2 - Two star-shaped oligofluorenes with hexakis(fluoren-2-yl)benzene as core are designed and synthesized, namely Tn0 and Tn1. Diethylamino groups are attached to the side chain of fluorene units of Tn0 and Tn1 and enable them alcohol solubility, additional hydrophobic nhexyl chains are grafted on the π-extended fluorene arms of Tn1. Power conversion efficiency (PCE) as high as 8.62% and 8.80% are achieved when utilizing Tn0 and Tn1 as cathode interlayers in inverted polymer solar cells, respectively. The work function of ITO effectively decreased by introducing interlayer, resulting in high Voc of the device, besides, the wetting properties of the interlayers can be tuned by modifying the oligofluorenes with π-extended structure, and the more hydrophobic interlayer will benefit the device performance with enhanced Jsc and FF.

AB - Two star-shaped oligofluorenes with hexakis(fluoren-2-yl)benzene as core are designed and synthesized, namely Tn0 and Tn1. Diethylamino groups are attached to the side chain of fluorene units of Tn0 and Tn1 and enable them alcohol solubility, additional hydrophobic nhexyl chains are grafted on the π-extended fluorene arms of Tn1. Power conversion efficiency (PCE) as high as 8.62% and 8.80% are achieved when utilizing Tn0 and Tn1 as cathode interlayers in inverted polymer solar cells, respectively. The work function of ITO effectively decreased by introducing interlayer, resulting in high Voc of the device, besides, the wetting properties of the interlayers can be tuned by modifying the oligofluorenes with π-extended structure, and the more hydrophobic interlayer will benefit the device performance with enhanced Jsc and FF.

KW - Alcohol soluble

KW - Cathode interlayer

KW - Inverted polymer solar cells

KW - Structures and properties

UR - https://www.scopus.com/pages/publications/84952648429

U2 - 10.1016/j.orgel.2015.12.025

DO - 10.1016/j.orgel.2015.12.025

M3 - 文章

AN - SCOPUS:84952648429

SN - 1566-1199

VL - 30

SP - 182

EP - 190

JO - Organic Electronics

JF - Organic Electronics

ER -

Improved performance of inverted polymer solar cells by utilizing alcohol-soluble oligofluorenes as efficient cathode interlayers

Abstract

Keywords

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