Synthesis and Photovoltaic Properties of a Solution-Processable Organic Molecule Containing Triphenylamine and DCM Moieties

详细信息    查看全文

• 作者：Chang He ; Qingguo He ; Xiaodi Yang ; Guanglong Wu ; Chunhe Yang ; Fenglian Bai ; Zhigang Shuai ; Lingxuan Wang ; Yongfang Li
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：June 21, 2007
• 年：2007
• 卷：111
• 期：24
• 页码：8661 - 8666
• 全文大小：167K
• 年卷期：v.111,no.24(June 21, 2007)
• ISSN：1932-7455

文摘

A solution processible organic conjugated molecule 2-[2,6-bis-(2-{4-[2-(4-diphenylaminophenyl)vinyl]phenyl}vinyl)pyran-4-ylidene]malononitrile (TPA-DCM-TPA) was designed and synthesized for application inorganic solar cells (OSCs). The molecule consists of two electron-rich triphenylamine moieties and one electron-deficient 2-pyran-4-ylidenemalononitrile unit linked with conjugated bridges. The optical and electrochemicalproperties, the light-induced electron spin resonance (LESR), and the electronic ground state configuration ofthe compound were characterized. TPA-DCM-TPA film showed a broad absorption band covering from350 to 650 nm. The bulk-heterojunction OSCs with the device structure of ITO/PEDOT:PSS/TPA-DCM-TPA:PCBM/LiF/Al or Ba/Al were fabricated, in which TPA-DCM-TPA was used as donor and PCBM asacceptor material. The open-circuit voltage, short-circuit current, and power-conversion efficiency of theoptimized OSC with Ba/Al as cathode, TPA-DCM-TPA:PCBM = 1:3 (w/w), and ca. 85 nm thickness ofthe active layer reached 0.9 V, 2.14 mA/cm², and 0.79%, respectively, under the illumination of AM1.5, 100mW/cm². The results indicate that TPA-DCM-TPA is a promising photovoltaic organic molecule.