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Journal of Materials Chemistry A · 2014 ·Vol. 3 ·期 7 ·3777-3784 · IF 0

A new D–A–π–A type organic sensitizer based on substituted dihydroindolo [2,3-b] carbazole and DPP unit with a bulky branched alkyl chain for highly efficient DSCs

Guojian Tian,Shengyun Cai,Xin Li,Hans Ågren,Qiaochun Wang,Jinhai Huang,Jianhua Su

Two new D–A–π–A configuration metal-free organic sensitizers (T1–T2) based on 5,7-dihexyl-6,12-diphenyl-5,7-dihydroindolo[2,3-b]carbazole and a DPP unit with a bulky branched alkyl chain have been synthesized for dye-sensitized solar cells. Due to a bulky branched alkyl chain being attached to the donor and DPP unit, both compounds obtain high Voc values. Under standard global AM 1.5 solar light conditions, the T1 based-device gives a high conversion efficiency of 8.24% with a Jsc of 15.72 mA cm−2, a Voc of 0.74 V and a FF of 0.71. These excellent performances make the donor dihydroindolo[2,3-b] carbazole and DPP unit promising candidates for further application in DSCs.

研究领域: 材料科学 · 能源科学

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Journal of Inorganic and Organometallic Polymers and Materials · 2022 ·Vol. 32 ·期 5 ·1736-1743 · IF 3.518

Novel Polymeric Metal Complexes for Dye Sensitizer: Synthesis and Photovoltaic Performances

Zhang Houpeng,Wu Xianming,Tian Yong,Wang Kaixuan,Tang Shiyu,Zhong Chaofan

Four novel polymeric metal complexes with a D–A–π–A motif, BDTT-PY-Cd, BDTT-PY-Zn, BDTT-PY-Cu and BDTT-PY-Ni, were designed, synthesized and characterized. These polymeric metal complexes were made up with Cd(II), Zn(II), Cu(II), Ni(II) complexes, thienylbenzo-[1,2-b:4,5-b'] dithiophene (BDTT) and the 8-quinolinol derivative, which were used severally as dye sensitzers’ auxiliary electron acceptors (A), electron donor (D) and π bridges as well as the acceptors (A). Under AM 1.5 irradiation (100 mW cm −2 ), the devices of dye sensitized solar cells (DSSC) based on four polymer complexes exhibited short-circuit photocurrent densities ( J sc ) of 17.45 mA cm −2 , 14.75 mA cm −2 , 13.94 mA cm −2 and 12.00 mA cm −2 , as well as attractive power conversion efficiencies (PCE) of were 9.73%, 8.02%, 6.82% and 6.12%, respectively. The photovoltaic conversion efficiency (PCE) and short-circuit photocurrent density ( J sc ) of BDTT-PY-Cd, BDTT-PY-Zn, BDTT-PY-Cu and BDTT-PY-Ni decrease in order because the radius and charge number of the metal ion affect the strength of the coordination bond between the metal ion and the ligand. These results provides a new way of development for efficient and stable dye sensitizers in the future.

研究领域: 材料科学 · 化学

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A new D–A–π–A type organic sensitizer based on substituted dihydroindolo [2,3-b] carbazole and DPP unit with a bulky branched alkyl chain for highly efficient DSCs

Novel Polymeric Metal Complexes for Dye Sensitizer: Synthesis and Photovoltaic Performances