Molecular engineering of push-pull chromophore for efficient bulk-heterojunction morphology in solution processed small molecule organic photovoltaics

被引：60

作者：

Ko, Haye Min ^{[1
]}

Choi, Hyunbong ^{[1
]}

Paek, Sanghyun ^{[1
]}

Kim, Kyungjun ^{[1
]}

Song, Kihyung ^{[2
]}

Lee, Jae Kwan ^{[3
,4
]}

Ko, Jaejung ^{[1
]}

机构：

[1] Korea Univ, Dept Adv Mat Chem, Chungnam 330700, South Korea

[2] Korea Natl Univ Educ, Dept Chem, Chungbuk 363791, South Korea

[3] Hoseo Univ, Dept Green Energy Engn, Chungnam 336795, South Korea

[4] Hoseo Univ, Res Ctr Convergence Technol, Chungnam 336795, South Korea

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2011年 / 21卷 / 20期

关键词：

LOW-BAND-GAP; SOLAR-CELLS; CONJUGATED POLYMERS; PHASE-SEPARATION; DYE; OLIGOTHIOPHENE; PERFORMANCE; DERIVATIVES; DESIGN;

D O I：

10.1039/c1jm10667h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The synthesis and characterization of new push-pull chromophores, bisDMFA-diTh-CA, bisDMFA-diTh-MMN, and bisDMFA-diTh-MIMN from 5'-(4-(bis(9,9-dimethyl-9H-fluoren-2-yl) aniline (bisDMFA) electron donating, dithiophene bridging, and various electron withdrawing moieties, cyanoacrylic acid (CA), methylene malononitrile (MMN), and methylene indenylidene malononitrile (MIMN), were demonstrated for efficient solution processed BHJ solar cells. The photophysical properties, the hole mobilities from the space charge limitation of current (SCLC) J-V characteristics, and surface morphologies of these materials/PCBM bulk-heterojunction films were also investigated. The best power conversion efficiency of 3.66% (+/- 0.12) with J(sc) = 11.82 m Lambda/cm(2), FF = 0.35, and V-oc = 0.90 V was observed in the BHJ film fabricated with the bisDMFA-diTh-MMN/C-71-PCBM composite with 3% 1-chloronaphthalene (CN), which is an efficiency similar to 82% and similar to 49% higher than before and after post-annealing without treatment of CN, respectively.

引用

页码：7248 / 7253

页数：6

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