Design and synthesis of small molecules with difluoroquinoxaline units for OSCs

被引：0

作者：

Kong, MinSung ^{[1
]}

Lee, Jihoon ^{[2
]}

Song, Suhee ^{[3
]}

Park, Seong Soo ^{[1
]}

Lee, Gun Dae ^{[1
]}

Lee, Won-Ki ^{[4
]}

Kim, Jin Young ^{[3
]}

Park, Sung Heum ^{[2
]}

Jin, Youngeup ^{[1
]}

机构：

[1] Pukyong Natl Univ, Dept Ind Chem, Busan 48513, South Korea

[2] Pukyong Natl Univ, Dept Phys, Busan 48513, South Korea

[3] Ulsan Natl Inst Sci & Technol UNIST, Dept Energy Engn, Ulsan 44919, South Korea

[4] Pukyong Natl Univ, Dept Polymer Engn, Busan, South Korea

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2020年 / 705卷 / 01期

关键词：

Fluorine atom; polymer; solar cells; synthesis; POLYMER SOLAR-CELLS; PHOTOVOLTAIC CELLS; EFFICIENCY; THIOPHENE; PERFORMANCE; COPOLYMER;

D O I：

10.1080/15421406.2020.1741827

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We designed and synthesized three novel small molecule donors (SM1, SM2 and SM3) that consist of thiophene as the electron-donating end group and 6, 7- difluoroquinoxaline moiety as a novel electron-withdrawing core group. The organic low band gap molecules with 6, 7- difluoroquinoxaline and thiophene units were synthesized using Stille coupling to generate SM1, SM2 and SM3. The absorption of SM2 and SM3 in solution was red shifted due to increased conjugation length of added thiophene units. In case of SM2 and SM3, introduction of hexyl chain in terminal thiophene units improve solubility in organic solvent. The maximum absorption peaks of SM1, SM2 and SM3 in solid thin films were at 482, 505 and 518 nm, respectively. SM3 was red shifted as compare to SM2 due to increased pi-pi stacking of electron donor materials.

引用

页码：79 / 86

页数：8

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