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

被引：6
作者：
Liu, Yuan [1 ]
Zhang, Wenjun [2 ]
Zou, Yang [1 ]
Xie, Guohua [1 ]
Fang, Junfeng [2 ]
Yang, Chuluo [1 ]
机构：
[1] Wuhan Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Hubei Key Lab Organ & Polymer Optoelect Mat, Dept Chem, Wuhan 430072, Peoples R China
[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China
来源：
ORGANIC ELECTRONICS | 2016年 / 30卷
基金：
中国国家自然科学基金;
关键词：
Cathode interlayer; Inverted polymer solar cells; Alcohol soluble; Structures and properties; POWER-CONVERSION EFFICIENCY; OPEN-CIRCUIT VOLTAGE; CONJUGATED POLYELECTROLYTE; ORGANIC PHOTOVOLTAICS; SELF-ORGANIZATION; INTER LAYER; MORPHOLOGY; MOLECULES; DONOR;
D O I：
10.1016/j.orgel.2015.12.025
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 p-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 pi-extended structure, and the more hydrophobic interlayer will benefit the device performance with enhanced Jsc and FF. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：182 / 190
页数：9
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