UV-ozone-treated MoO3 as the hole-collecting buffer layer for high-efficiency solution-processed SQ：PC71BM photovoltaic devices

The enhanced performance of a squaraine compound, with 2,4-bis[4-（N,N-diisobutylamino）-2,6-dihydroxyphenyl] squaraine as the donor and [6,6]-phenyl-C71-butyric acid methyl ester （PC71BM） as the acceptor, in solution-processed or- ganic photovoltaic devices is obtained by using UV-ozone-treated MoO3...

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Published in中国物理B：英文版 no. 3; pp. 608 - 612
Main Author 杨倩倩 杨道宾 赵谡玲 黄艳 徐征 龚伟 樊星 刘志方 黄清雨 馀叙瑢
Format Journal Article
LanguageEnglish
Published 01.03.2014
Subjects
三氧化钼薄膜
二羟基苯基
光电器件
搜集
空穴
缓冲层
能量转换效率
臭氧处理
Online AccessGet full text
ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/23/3/038405

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Summary:The enhanced performance of a squaraine compound, with 2,4-bis[4-（N,N-diisobutylamino）-2,6-dihydroxyphenyl] squaraine as the donor and [6,6]-phenyl-C71-butyric acid methyl ester （PC71BM） as the acceptor, in solution-processed or- ganic photovoltaic devices is obtained by using UV-ozone-treated MoO3 as the hole-collecting buffer layer. The optimized thickness of the MoO3 layer is 8 nm, at which the device shows the best power conversion efficiency （PCE） among all devices, resulting from a balance of optical absorption and charge transport. After being treated by UV-ozone for 10 min, the transmittance of the MoO3 film is almost unchanged. Atomic force microscopy results show that the treated surface morphology is improved. A high PCE of 3.99% under AM 1.5 G illumination （100 mW/cm2） is obtained.
Bibliography:The enhanced performance of a squaraine compound, with 2,4-bis[4-（N,N-diisobutylamino）-2,6-dihydroxyphenyl] squaraine as the donor and [6,6]-phenyl-C71-butyric acid methyl ester （PC71BM） as the acceptor, in solution-processed or- ganic photovoltaic devices is obtained by using UV-ozone-treated MoO3 as the hole-collecting buffer layer. The optimized thickness of the MoO3 layer is 8 nm, at which the device shows the best power conversion efficiency （PCE） among all devices, resulting from a balance of optical absorption and charge transport. After being treated by UV-ozone for 10 min, the transmittance of the MoO3 film is almost unchanged. Atomic force microscopy results show that the treated surface morphology is improved. A high PCE of 3.99% under AM 1.5 G illumination （100 mW/cm2） is obtained.
11-5639/O4
organic photovoltaic devices, hole-collecting buffer layer, MOO3, UV-ozone
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/23/3/038405