Novel high band gap pendant-borylated carbazole polymers with deep HOMO levels through direct +N=B- interaction for organic photovoltaics

被引：4

作者：

Brandt, Rasmus G. ^{[1
,2
]}

Sveegaard, Steffen G. ^{[1
,3
,4
,5
]}

Xiao, Manjun ^{[6
]}

Yue, Wei ^{[1
,2
]}

Du, Zhengkun ^{[1
,2
]}

Qiu, Meng ^{[6
]}

Angmo, Dechan ^{[7
]}

Andersen, Thomas R. ^{[7
,8
]}

Krebs, Frederik C. ^{[7
]}

Yang, Renqiang ^{[6
]}

Yu, Donghong ^{[1
,2
]}

机构：

[1] Aalborg Univ, Dept Chem & Biosci, Fredrik Bajers Vej 7H, DK-9220 Aalborg, Denmark

[2] Sino Danish Ctr Educ & Res SDC, Niels Jensens Vej 2, DK-8000 Aarhus, Denmark

[3] Aarhus Univ, Danish Natl Res Fdn, Ctr DNA Nanotechnol, Dept Chem, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark

[4] Aarhus Univ, iNANO, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark

[5] Unisense Environm AS, Tueager 1, DK-8200 Aarhus N, Denmark

[6] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, CAS Key Lab Biobased Mat, Qingdao 266101, Peoples R China

[7] Tech Univ Denmark, Dept Energy Convers & Storage, Frederiksborgvej 399, DK-4000 Roskilde, Denmark

[8] Univ Newcastle, Ctr Organ Elect, Univ Dr, Callaghan, NSW 2308, Australia

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2016年 / 4卷 / 20期

基金：

新加坡国家研究基金会; 中国国家自然科学基金;

关键词：

OPEN-CIRCUIT VOLTAGE; SOLAR-CELLS; CONJUGATED POLYMERS; OPTICAL-PROPERTIES; BUILDING-BLOCK; ACCEPTOR; EFFICIENT; LENGTH; UNIT;

D O I：

10.1039/c6tc01208f

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this communication, we investigate the direct and still conjugated intramolecular N+=B- interactions in novel high band gap borylated carbazole containing polymers, namely, poly(3,6-(N-di(2,4,6-trimethyl)-phenylboryl-carbazole)-alt- 4,8-di(5-(2-ethylhexyl)thiophene-2-yl)benzo[1,2-b: 4,5-b'] dithiophene) (P(3,6-BCBDT)) and poly(3,6-(N-di(2,4,6-trimethyl)phenylboryl-carbazole)-alt-3,3 '''- didodecyl-2,2': 5',2 '': 5 '',2 '''-quaterthiophene) (P(3,6-BCQT)), which result in ambipolarity, high electron affinity, and deep HOMO levels. The quasi-donor-acceptor nature of the two polymers was confirmed by UV-Vis absorption, electro-chemical property studies, and computer modelling. Band gaps of 2.07 eV for P(3,6-BCBDT) and 2.23 eV for P(3,6-BCQT) were obtained. P(3,6-BCQT) afforded a power conversion efficiency of 1.44%, with a J(sc) of 4.82 mA cm(-2), a V-oc of 0.79 V and a FF of 37%, and P(3,6-BCBDT) performed better with an efficiency of 3.82%, with a J(sc) of 8.31 mA cm(-2), a V-oc of 1.0 V based on its low lying HOMO level, and a FF of 45%.

引用

页码：4393 / 4401

页数：9