Fluorene/Thiophene-Based Conjugated Polymers Comprising Dibenzo[d]thiazol-2-yl methane and Malononitrile Pendants for Photovoltaic Devices

• Main Authors: Yao-Huang Chen, 陳耀煌
• Other Authors: 鄭如忠
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/64775064041456505024

碩士 === 國立中興大學 === 化學工程學系所 === 99 === Novel fluorine/thiophene-based conjugated polymers with dibenzo [d] thiazol -2-yl methane and malononitrile based pendants were synthesized via Suzuki coupling reactions. All polymers exhibited good solubility in organic solvents and stable thermal properties. The introduction of dibenzo [d] thiazol-2-yl methane and malononitrile as side chains would broaden the absorption of solar spectra and modulate the band gap of polymers. With the various ratios of fluorine and thiophene, the HOMO level was located at an ideal range (-5.2~-5.8 eV). The photovoltaic characteristics- the Voc values are ranged from 0.62 to 0.65 eV; the Jsc values ranged from 1.40 to 4.34 mA/cm2; the FF values ranged from 0.25 to 0.27; the PCE values ranged from 0.23 to 0.73 %. The best performance of photovoltaic device was obtained using PFDBT-2Th/PCBM blend (1:1 w/w) as photo-energy conversion layer. The PCE of 0.73 %, a Voc of 0.62 eV, a Jsc of 4.34 mA/cm2, and a FF of 0.27 were achieved.