Synthesis of triphenylamine-based thiophene-(N-aryl)pyrrole-thiophene dyes for聽dye-sensitized solar cell applications

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• 作者：Vellaiappillai Tamilavan^a ; Nara Cho^b ; Chulwoo Kim^b ; Jaejung Ko^b ; ^{jko@korea.ac.kr} ; Myung Ho Hyun^a ; ^c ; ^{mhhyun@pusan.ac.kr}
• 关键词：Dye-sensitized solar cells ; 1-(2 ; 6-Diisopropylphenyl)-2 ; 5-di(2-thienyl)pyrrole ; Triphenylamine-based dyes ; Metal-free organic dyes
• 刊名：Tetrahedron
• 出版年：2012
• 期刊代码：107_00404020
• 类别：ch
• 出版时间：22 July, 2012
• 卷：68
• 期：29
• 页码：5890-5897
• 文件大小：1057 K

摘要

Two new triphenylamine-based metal-free organic dyes (TPTDYE-1 and TPTDYE-2) containing 1-(2,6-diisopropylphenyl)-2,5-di(2-thienyl)pyrrole as a new 蟺-conjugated chromophore were synthesized for dye-sensitized solar cell (DSSC) applications. TPTDYE-1 containing three donor groups around the acceptor group was found to show relatively narrow absorption band from 300 nm to 470 nm while TPTDYE-2 having extended 蟺-蟺 delocalization between the donor and acceptor group showed broad absorption band from 300 nm to 550 nm. The electrochemical studies indicate that the HOMO-LUMO energy gap of TPTDYE-1 is considerably wider than that of TPTDYE-2. The dye-sensitized solar cell performance of each dye was investigated, and the TPTDYE-2-sensitized cell was found to show a maximum monochromatic incident photon-to-current conversion efficiency (IPCE) of 75%, a short-circuit photocurrent density (J_sc) of 13.50 mA/cm², an open-circuit voltage (V_oc) of 0.72 V, and a fill factor (FF) of 0.69, corresponding to an overall conversion efficiency of 6.71%under simulated AM 1.5 irradiation (100 mW/cm²). Under the same condition the TPTDYE-1-sensitized cell showed the same IPCE value of 75%with a promising conversion efficiency of 6.00%, a J_sc of 11.11 mA/cm², a V_oc of 0.76 V, and a FF of 0.71.